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Komatsu D375A-6 Bulldozer Service Repair Manual – PDF Download
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- Komatsu D375A-6 Bulldozer Service Repair Manual
- SERIAL NUMBERS 60001 and up
- PUBLICATION NUMBER:SEN05006-09
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Description
Komatsu D375A-6 Bulldozer Service Repair Manual
Description:
Komatsu D375A-6 Bulldozer Service Repair Manual
- 1) Before carrying out any greasing or repairs, read all the safety labels stuck to the machine. For the locations of the safety labels and detailed explanation of precautions, see the Operation and Maintenance Manual.
- 2) Decide a place in the repair workshop to keep tools and removed parts. Always keep the tools and parts in their correct places. Always keep the work area clean and make sure that there is no dirt, water, or oil on the floor. Smoke only in the areas provided for smoking. Never smoke while working.
- 3) When carrying out any operation, always wear safety shoes and helmet. Do not wear loose work clothes, or clothes with buttons missing. q Always wear the safety glasses when hitting parts with a hammer q Always wear safety glasses when grinding parts with a grinder, etc.
- 4) When carrying out any operation with 2 or more workers, always agree on the operating procedure before starting. Always inform your fellow workers before starting any step of the operation. Before starting work, hang UNDER REPAIR warning tag in the operator’s compartment.
- 5) Only qualified workers must carry out work and operation which require license or qualification.
- 6) Keep all tools in good condition, learn the correct way to use them, and use the proper ones of them. Before starting work, thoroughly check the tools, machine, forklift, service car, etc.
Table of Contents:
Komatsu D375A-6 Bulldozer Service Repair Manual
COVER ................................................................................................................................................................................................ 1 Notice of revision.................................................................................................................................................................................... 3 00 Index and Foreword................................................................................................................................................................................. 12 Table of contents................................................................................................................................................................................. 13 Forword and general information................................................................................................................................................................... 26 Safety notice................................................................................................................................................................................. 26 How to read the shop manual................................................................................................................................................................... 31 Explanation of terms for maintenance standard................................................................................................................................................. 33 Handling of electric equipment and hydraulic components....................................................................................................................................... 35 Handling of connectors newly used for engines................................................................................................................................................. 44 How to read electric wire code................................................................................................................................................................ 47 Precautions when carrying out work............................................................................................................................................................ 50 Method of disassembling and connecting push-pull type coupler................................................................................................................................. 53 Standard tightening torque table.............................................................................................................................................................. 56 List of Abbreviation.......................................................................................................................................................................... 60 Conversion table.............................................................................................................................................................................. 64 01 Specification...................................................................................................................................................................................... 70 Specification and technical data.................................................................................................................................................................. 72 Specification drawing......................................................................................................................................................................... 72 Specifications................................................................................................................................................................................ 73 Weight table.................................................................................................................................................................................. 78 Table of fuel, coolant and lubricants......................................................................................................................................................... 80 10 Structure and function............................................................................................................................................................................. 82 Engine and cooling system......................................................................................................................................................................... 85 Cooling system................................................................................................................................................................................ 85 Cooling fan pump.............................................................................................................................................................................. 87 Cooling fan motor............................................................................................................................................................................. 107 Power train....................................................................................................................................................................................... 113 Power train................................................................................................................................................................................... 113 Overall drawing of power train unit........................................................................................................................................................... 115 Power train hydraulic equipment arrangement drawing........................................................................................................................................... 117 Damper and universal joint.................................................................................................................................................................... 119 Torque converter and PTO...................................................................................................................................................................... 121 Torque converter control valve................................................................................................................................................................ 127 Main relief valve and torque converter relief valve........................................................................................................................................... 129 Lockup clutch ECMV and stator clutch ECMV..................................................................................................................................................... 131 Scavenging pump............................................................................................................................................................................... 136 Transmission control.......................................................................................................................................................................... 137 PCCS lever.................................................................................................................................................................................... 139 Transmission.................................................................................................................................................................................. 143 Transmission ECMV............................................................................................................................................................................. 157 Transmission lubricating oil relief valve..................................................................................................................................................... 162 Steering and brake control.................................................................................................................................................................... 163 Transfer unit, bevel gear shaft and steering.................................................................................................................................................. 165 Steering control valve........................................................................................................................................................................ 171 Steering clutch ECMV and Steering brake ECMV.................................................................................................................................................. 173 Parking brake valve........................................................................................................................................................................... 180 Sudden stop prevention valve.................................................................................................................................................................. 182 Final drive................................................................................................................................................................................... 184 Undercarriage and frame........................................................................................................................................................................... 189 Track frame................................................................................................................................................................................... 189 Idler cushion................................................................................................................................................................................. 191 Track roller bogie............................................................................................................................................................................ 192 Main frame.................................................................................................................................................................................... 193 Suspension.................................................................................................................................................................................... 195 Hydraulic system.................................................................................................................................................................................. 198 Work equipment hydraulic piping diagram....................................................................................................................................................... 198 PPC control piping diagram.................................................................................................................................................................... 202 Work equipment control........................................................................................................................................................................ 203 Hydraulic tank................................................................................................................................................................................ 205 Accumulator................................................................................................................................................................................... 207 PPC lock valve................................................................................................................................................................................ 208 PPC valve..................................................................................................................................................................................... 210 Piston valve.................................................................................................................................................................................. 221 Quick drop valve.............................................................................................................................................................................. 222 Pin puller switch............................................................................................................................................................................. 223 Pin puller solenoid valve..................................................................................................................................................................... 224 Blade control lever (only for the machine with dual tilt specification)....................................................................................................................... 226 Work equipment pump........................................................................................................................................................................... 227 Control valve................................................................................................................................................................................. 239 Self-pressure reducing valve.................................................................................................................................................................. 264 Work equipment.................................................................................................................................................................................... 271 Cylinder stay................................................................................................................................................................................. 271 Cab and its attachments........................................................................................................................................................................... 272 Cab mount..................................................................................................................................................................................... 272 Cab........................................................................................................................................................................................... 273 Electrical system................................................................................................................................................................................. 275 Engine control................................................................................................................................................................................ 275 Engine control system......................................................................................................................................................................... 276 CRI engine control system..................................................................................................................................................................... 285 Monitor system................................................................................................................................................................................ 287 Machine monitor............................................................................................................................................................................... 289 Lamp system................................................................................................................................................................................... 308 Engine preheat (electrical intake air heater) control......................................................................................................................................... 309 Palm command control system................................................................................................................................................................... 310 Sensor........................................................................................................................................................................................ 313 Vehicle health monitoring system (VHMS)....................................................................................................................................................... 319 ORBCOMM system................................................................................................................................................................................ 325 20 Standard value table............................................................................................................................................................................... 328 Standard service value table...................................................................................................................................................................... 330 Standard value table for engine............................................................................................................................................................... 330 Standard value table for machine.............................................................................................................................................................. 331 30 Testing and adjusting.............................................................................................................................................................................. 340 Tools for testing, adjusting, and troubleshooting................................................................................................................................................. 343 Tools for testing, adjusting, and troubleshooting............................................................................................................................................. 343 Engine and cooling system......................................................................................................................................................................... 345 Testing engine speed.......................................................................................................................................................................... 345 Testing intake air pressure (boost pressure).................................................................................................................................................. 349 Testing exhaust temperature................................................................................................................................................................... 351 Testing exhaust gas color..................................................................................................................................................................... 355 Adjusting valve clearance..................................................................................................................................................................... 357 Measuring compression pressure................................................................................................................................................................ 359 Testing blow-by pressure...................................................................................................................................................................... 364 Testing engine oil pressure................................................................................................................................................................... 363 Testing EGR valve drive oil pressure.......................................................................................................................................................... 365 Handling of fuel system devices............................................................................................................................................................... 367 Releasing residual pressure from fuel system.................................................................................................................................................. 368 Testing fuel pressure......................................................................................................................................................................... 369 Handling of reduced cylinder mode operation................................................................................................................................................... 370 Handling of no injection cranking operation................................................................................................................................................... 370 Testing leakage from pressure limiter and return rate from injector........................................................................................................................... 371 Bleeding air from fuel circuit................................................................................................................................................................ 374 Testing fuel circuit for leakage.............................................................................................................................................................. 376 Replacing and adjusting alternator and air conditioner compressor belt........................................................................................................................ 377 Measuring fan speed........................................................................................................................................................................... 378 Testing fan circuit oil pressure.............................................................................................................................................................. 379 Bleeding air from fan pump.................................................................................................................................................................... 380 Adjusting fuel control dial and decelerator pedal............................................................................................................................................. 381 Power train....................................................................................................................................................................................... 383 Testing power train oil pressure.............................................................................................................................................................. 383 Adjusting transmission output speed sensor.................................................................................................................................................... 401 Simple test procedure for brake performance................................................................................................................................................... 402 Adjusting brake pedal and parking brake lever................................................................................................................................................. 403 Adjusting position of pccs lever console...................................................................................................................................................... 406 Emergency escape method when there is failure in power train.................................................................................................................................. 407 Undercarriage and frame........................................................................................................................................................................... 409 Inspecting wear of sprocket................................................................................................................................................................... 409 Testing and adjusting track shoe tension...................................................................................................................................................... 410 Hydraulic system.................................................................................................................................................................................. 411 Measuring and adjusting work equipment oil pressure........................................................................................................................................... 411 Testing control circuit main pressure......................................................................................................................................................... 414 Testing PPC valve output pressure............................................................................................................................................................. 415 Adjusting play of PPC valve................................................................................................................................................................... 417 Testing output pressure of ripper pin-puller solenoid valve................................................................................................................................... 418 Checking location of cause of hydraulic drift of blade and ripper............................................................................................................................. 419 Testing leakage inside work equipment cylinder................................................................................................................................................ 420 Releasing remaining pressure in work equipment cylinders...................................................................................................................................... 421 Bleeding air from work equipment cylinders.................................................................................................................................................... 421 Adjusting ripper lever position............................................................................................................................................................... 422 Work equipment.................................................................................................................................................................................... 423 Adjusting work equipment lock lever........................................................................................................................................................... 423 Adjusting blade............................................................................................................................................................................... 424 Cab and its attachments........................................................................................................................................................................... 426 Testing and adjusting operator's cab.......................................................................................................................................................... 426 Electrial system.................................................................................................................................................................................. 435 Special functions of machine monitor (EMMS)................................................................................................................................................... 435 Handling of voltage circuit of engine controller.............................................................................................................................................. 496 Adjustment method when controller has been replaced........................................................................................................................................... 497 Preparation work for troubleshooting of electrical system..................................................................................................................................... 501 Inspection procedure of diode................................................................................................................................................................. 505 Handling of optional devices.................................................................................................................................................................. 506 Request for opening ORBCOMM terminal.......................................................................................................................................................... 507 Initialization procedures for VHMS controller................................................................................................................................................. 509 Using method of KOMTRAX functions of ORBCOMM terminal......................................................................................................................................... 524 Precautions for replacing VHMS controller..................................................................................................................................................... 527 Pm Clinic service................................................................................................................................................................................. 533 Pm Clinic service............................................................................................................................................................................. 533 40 Troubleshooting.................................................................................................................................................................................... 545 General Information on troubleshooting............................................................................................................................................................ 553 Points to remember when troubleshooting....................................................................................................................................................... 553 Sequence of events in troubleshooting......................................................................................................................................................... 554 Checks before troubleshooting................................................................................................................................................................. 555 Classification and procedures for troubleshooting............................................................................................................................................. 580 Failure codes table........................................................................................................................................................................... 583 Phenomena and troubleshooting numbers......................................................................................................................................................... 589 Information in troubleshooting table.......................................................................................................................................................... 591 Troubleshooting method for disconnecting wiring harness of pressure sensor system............................................................................................................. 593 Connection table for connector pin numbers.................................................................................................................................................... 596 Connectors table and arrangement drawing...................................................................................................................................................... 632 T-branch box and T-branch adapter table....................................................................................................................................................... 646 Fuse locations table.......................................................................................................................................................................... 649 Troubleshooting by failure code................................................................................................................................................................... 653 Failure code [1380MW] Lock up clutch: Slip.................................................................................................................................................... 653 Failure code [1500L0] Transmission clutch: Abnormal........................................................................................................................................... 654 Failure code [15E0MW] Transmission clutch: Slip............................................................................................................................................... 655 Failure code [15SAL1] Forward clutch: Fill high............................................................................................................................................... 656 Failure code [15SALH] Forward clutch: Fill Low................................................................................................................................................ 658 Failure code [15SBL1] Reverse clutch: Fill high............................................................................................................................................... 660 Failure code [15SBLH] Reverse clutch: Fill Low................................................................................................................................................ 662 Failure code [15SEL1] Speed 1st clutch: Fill high............................................................................................................................................. 664 Failure code [15SELH] Speed 1st clutch: Fill Low.............................................................................................................................................. 666 Failure code [15SFL1] Speed 2nd clutch: Fill high............................................................................................................................................. 668 Failure code [15SFLH] Speed 2nd clutch: Fill Low.............................................................................................................................................. 670 Failure code [15SGL1] Speed 3rd clutch: Fill high............................................................................................................................................. 672 Failure code [15SGLH] Speed 3rd clutch: Fill Low.............................................................................................................................................. 674 Failure code [15SJL1] L/U: Fill high.......................................................................................................................................................... 676 Failure code [15SJLH] L/U: Fill low........................................................................................................................................................... 678 Failure code [1800MW] P/T clutch: Slip........................................................................................................................................................ 680 Failure code [2201L1] Right clutch: Fill high................................................................................................................................................. 682 Failure code [2201LH] Right clutch: Fill low.................................................................................................................................................. 684 Failure code [2202L1] Left clutch: Fill high.................................................................................................................................................. 686 Failure code [2202LH] Left clutch: Fill low................................................................................................................................................... 688 Failure code [2300NR] Brake Themal Load Abnormality........................................................................................................................................... 690 Failure code [2301L1] Right brake: Fill high.................................................................................................................................................. 692 Failure code [2301LH] Right brake: Fill low................................................................................................................................................... 694 Failure code [2301NR] Steering Brake RH Themal Load Abnormality............................................................................................................................... 696 Failure code [2302L1] Left brake: Fill high................................................................................................................................................... 698 Failure code [2302LH] Left brake: Fill low.................................................................................................................................................... 700 Failure code [2302NR] Steering Brake LH Themal Load Abnormality............................................................................................................................... 702 Failure code [7RFAKA] ECM ACC CUT RELAY: Disconnection........................................................................................................................................ 704 Failure code [7RFAKB] ECM ACC CUT RELAY: Short circuit........................................................................................................................................ 706 Failure code [AA10NX] Air Cleaner Clogging.................................................................................................................................................... 708 Failure code [AB00MA] Battery Charge Abnormal................................................................................................................................................. 710 Failure code [B@BAZG] Eng Oil Press Low....................................................................................................................................................... 710 Failure code [B@BAZK] Eng Oil Level Low....................................................................................................................................................... 711 Failure code [B@BCNS] Eng Water Overheat...................................................................................................................................................... 712 Failure code [B@BCZK] Eng Water Level Low..................................................................................................................................................... 713 Failure code [B@CENS] T/C Oil Overheat........................................................................................................................................................ 714 Failure code [B@HANS] Hyd Oil Overheat........................................................................................................................................................ 715 Failure code [B@HAZK] Hyd Oil Level Low....................................................................................................................................................... 716 Failure code [CA111] ECM Critical Internal Failure............................................................................................................................................ 718 Failure code [CA115] Eng Ne and Bkup Speed Sens Error......................................................................................................................................... 720 Failure code [CA122] Chg Air Press Sensor High Error.......................................................................................................................................... 722 Failure code [CA123] Chg Air Press Sensor Low Error........................................................................................................................................... 724 Failure code [CA131] Throttle Sensor High Error............................................................................................................................................... 726 Failure code [CA132] Throttle Sensor Low Error................................................................................................................................................ 728 Failure code [CA135] Eng Oil Press Sensor High Error.......................................................................................................................................... 730 Failure code [CA141] Eng Oil Press Sensor Low Error........................................................................................................................................... 732 Failure code [CA144] Coolant Temp Sens High Error............................................................................................................................................. 734 Failure code [CA145] Coolant Temp Sens Low Error.............................................................................................................................................. 736 Failure code [CA153] Chg Air Temp Sensor High Error........................................................................................................................................... 738 Failure code [CA154] Chg Air Temp Sensor Low Error............................................................................................................................................ 740 Failure code [CA187] Sens Supply 2 Volt Low Error............................................................................................................................................. 742 Failure code [CA212] Eng Oil Temp Sensor High Error........................................................................................................................................... 744 Failure code [CA213] Eng Oil Temp Sensor Low Error............................................................................................................................................ 746 Failure code [CA221] Ambient Press Sens High Error............................................................................................................................................ 748 Failure code [CA222] Ambient Press Sens Low Error............................................................................................................................................. 750 Failure code [CA227] Sens Supply 2 Volt High Error............................................................................................................................................ 752 Failure code [CA234] Eng Overspeed............................................................................................................................................................ 753 Failure code [CA238] Ne Speed Sens Supply Volt Error.......................................................................................................................................... 754 Failure code [CA263] Fuel Temp Sensor High Error.............................................................................................................................................. 756 Failure code [CA265] Fuel Temp Sensor Low Error............................................................................................................................................... 758 Failure code [CA271] IMV/PCV1 Short Error..................................................................................................................................................... 760 Failure code [CA272] IMV/PCV1 Open Error...................................................................................................................................................... 761 Failure code [CA273] PCV2 Short Error......................................................................................................................................................... 762 Failure code [CA274] PCV2 Open Error.......................................................................................................................................................... 763 Failure code [CA322] Inj #1 (L#1) Open/Short Error............................................................................................................................................ 764 Failure code [CA323] Inj #5 (L#5) Open/Short Error............................................................................................................................................ 766 Failure code [CA324] Inj #3 (L#3) Open/Short Error............................................................................................................................................ 768 Failure code [CA325] Inj #6 (L#6) Open/Short Error............................................................................................................................................ 770 Failure code [CA331] Inj #2 (L#2) Open/Short Error............................................................................................................................................ 772 Failure code [CA332] Inj #4 (L#4) Open/Short Error............................................................................................................................................ 774 Failure code [CA342] Calibration Code Incompatibility......................................................................................................................................... 776 Failure code [CA351] Injectors Drive Circuit Error............................................................................................................................................ 777 Failure code [CA352] Sens Supply 1 Volt Low Error............................................................................................................................................. 778 Failure code [CA386] Sens Supply 1 Volt High Error............................................................................................................................................ 780 Failure code [CA441] Battery Voltage Low Error................................................................................................................................................ 781 Failure code [CA442] Battery Voltage High Error............................................................................................................................................... 782 Failure code [CA449] Rail Press Very High Error............................................................................................................................................... 783 Failure code [CA451] Rail Press Sensor High Error............................................................................................................................................. 784 Failure code [CA452] Rail Press Sensor Low Error.............................................................................................................................................. 786 Failure code [CA553] Rail Press High Error.................................................................................................................................................... 788 Failure code [CA554] Rail Press Sensor In Range Error......................................................................................................................................... 789 Failure code [CA559] Rail Press Low Error..................................................................................................................................................... 790 Failure code [CA689] Eng Ne Speed Sensor Error................................................................................................................................................ 794 Failure code [CA731] Eng Bkup Speed Sens Phase Error.......................................................................................................................................... 796 Failure code [CA757] All Continuous Data Lost Error........................................................................................................................................... 797 Failure code [CA778] Eng Bkup Speed Sensor Error.............................................................................................................................................. 798 Failure code [CA1228] EGR Valve Servo Error 1................................................................................................................................................. 800 Failure code [CA1625] EGR Valve Servo Error 2................................................................................................................................................. 801 Failure code [CA1633] KOMNET Datalink Timeout Error........................................................................................................................................... 802 Failure code [CA2185] Throt Sens Sup Volt High Error.......................................................................................................................................... 803 Failure code [CA2186] Throt Sens Sup Volt Low Error........................................................................................................................................... 804 Failure code [CA2249] Rail Press Very Low Error............................................................................................................................................... 805 Failure code [CA2271] EGR Valve Pos Sens High Error........................................................................................................................................... 806 Failure code [CA2272] EGR Valve Pos Sens Low Error............................................................................................................................................ 808 Failure code [CA2351] EGR Valve Sol Current High Error........................................................................................................................................ 810 Failure code [CA2352] EGR Valve Sol Current Low Error......................................................................................................................................... 812 Failure code [D110KB] Battery Relay: Drive Short Circuit...................................................................................................................................... 814 Failure code [D130KA] Neutral relay: Disconnection............................................................................................................................................ 816 Failure code [D130KB] Neutral relay: Short circuit............................................................................................................................................ 818 Failure code [D161KA] Back-up alarm releay: Disconnection..................................................................................................................................... 820 Failure code [D161KB] Back-up alarm releay: Short circuit..................................................................................................................................... 822 Failure code [D182KZ] Preheater Relay Abnormality............................................................................................................................................. 824 Failure code [D190KA] ACC signal relay: Disconnection......................................................................................................................................... 826 Failure code [D190KB] ACC signal relay: Short circuit......................................................................................................................................... 828 Failure code [D1EFKA] Pre lub. motor relay: Disconnection..................................................................................................................................... 830 Failure code [D1EFKB] Pre lub. motor relay: Short circuit..................................................................................................................................... 832 Failure code [DAFRKR] Monitor: Can communication lost (PT).................................................................................................................................... 834 Failure code [dAFRKR] Monitor: CAN communication lost (WE).................................................................................................................................... 835 Failure code [DAFRMC] CAN Discon (Monitor Detected)........................................................................................................................................... 836 Failure code [DB2RKR] ENG cont.: Can communication lost (PT).................................................................................................................................. 841 Failure code [dB2RKR] ENG controller: CAN communication lost (WE)............................................................................................................................. 844 Failure code [DB90KT] WE controller: Abnormality in controller................................................................................................................................ 845 Failure code [DB91KK] WE controller: Source voltage reduction................................................................................................................................. 846 Failure code [DB92KK] WE controller: Output voltage reduction................................................................................................................................. 848 Failure code [DB97KK] WE cont.: Sensor voltage 5 V (2) reduction.............................................................................................................................. 850 Failure code [DB99KQ] WE controller: Type select signal....................................................................................................................................... 852 Failure code [DB9RKR] WE controller: Can communication lost (PT).............................................................................................................................. 853 Failure code [DBB0KK] VHMS controller:Source voltage reduction................................................................................................................................ 856 Failure code [DBB0KQ] VHMS connector connection abnormality................................................................................................................................... 858 Failure code [DBB3KK] VHMS controller: Source voltage reduction............................................................................................................................... 860 Failure code [DBB5KP] VHMS: Output sensor1 voltage reduction.................................................................................................................................. 862 Failure code [DBB6KP] VHMS:Output sensor2 voltage reduction................................................................................................................................... 864 Failure code [DBB7KP] VHMS:Output sensor3 voltage reduction................................................................................................................................... 866 Failure code [DBBQKR] PT cont.: Can communication lost (VHMS)................................................................................................................................. 867 Failure code [DBE0KT] PT controller: Abnormality in controller................................................................................................................................ 867 Failure code [DBE1KK] PT controller: Source voltage reduction................................................................................................................................. 868 Failure code [DBE2KK] PT controller: Output voltage reduction................................................................................................................................. 870 Failure code [DBE5KK] PT cont.: Sensor voltage 5 V (1) reduction.............................................................................................................................. 872 Failure code [DBE6KK] PT cont.: Sensor voltage 24 V reduction................................................................................................................................. 874 Failure code [DBE7KK] PT cont.: Sensor voltage 5 V (2) reduction.............................................................................................................................. 876 Failure code [DBE9KQ] PT controller: Type select signal....................................................................................................................................... 878 Failure code [DBERKR] PT controller: Can communication lost (WE).............................................................................................................................. 879 Failure code [DD12KA] Shift up Sw: Disconnection.............................................................................................................................................. 882 Failure code [DD12KB] Shift up Sw: Short circuit.............................................................................................................................................. 884 Failure code [DD13KA] Shift down Sw: Disconnection............................................................................................................................................ 886 Failure code [DD13KB] Shift down Sw: Short circuit............................................................................................................................................ 888 Failure code [DD14KA] Parking lever Sw: Dissconnection........................................................................................................................................ 890 Failure code [DD14KB] Parking lever Sw: Short circuit......................................................................................................................................... 892 Failure code [DDB9L4] Reverse SW Signal disagreement.......................................................................................................................................... 894 Failure code [DDE2KA] Pre lub. oil press sw: Disconnection.................................................................................................................................... 896 Failure code [DDK3L4] Forward SW Signal disagreement.......................................................................................................................................... 898 Failure code [DDK5KA] Shift switch disconnection.............................................................................................................................................. 900 Failure code [DDK5KB] Shift switch short circuit.............................................................................................................................................. 902 Failure code [DDN2LD] Blade tilt RH pressure SW abnormality................................................................................................................................... 904 Failure code [DDN3LD] Blade tilt LH pressure SW abnormality................................................................................................................................... 906 Failure code [DDN7KA] WEQ Knob Sw (down): Disconnection....................................................................................................................................... 908 Failure code [DDN7KB] WEQ Knob Sw (down): Short circuit....................................................................................................................................... 910 Failure code [DDN9KA] WEQ Knob Sw (up): Disconnection......................................................................................................................................... 912 Failure code [DDN9KB] WEQ Knob Sw (up): Short circuit......................................................................................................................................... 914 Failure code [DDNALD] Blade lift up pressure SW abnormality................................................................................................................................... 916 Failure code [DDNBLD] Ripper lift up pressure SW abnormality.................................................................................................................................. 918 Failure code [DDNCLD] Ripper lift down pressure SW abnormality................................................................................................................................ 920 Failure code [DDNDLD] Ripper tilt in pressure SW abnormality.................................................................................................................................. 922 Failure code [DDNELD] Ripper tilt back pressure SW abnormality................................................................................................................................ 924 Failure code [DDNFLD] Blade lift down pressure SW abnormality................................................................................................................................. 926 Failure code [DDNLKA] Weq lock Sw: Disconnection.............................................................................................................................................. 928 Failure code [DDNLKB] Weq lock Sw: Short circuit.............................................................................................................................................. 930 Failure code [DDT5KA] Neutral switch disconnection............................................................................................................................................ 932 Failure code [DDT5KB] Neutral switch short circuit............................................................................................................................................ 934 Failure code [DDT5KQ] Lever SPEC selection signal disagreement................................................................................................................................ 936 Failure code [DDTSL1] S/C: Fill high.......................................................................................................................................................... 938 Failure code [DDTSLH] S/C: Fill low........................................................................................................................................................... 940 Failure code [DGE5KX] Ambient temp sensor abnormality......................................................................................................................................... 942 Failure code [DGS1KX] Hyd oil temp: signal abnormal........................................................................................................................................... 944 Failure code [DGT1KA] T/C oil temp sensor: Abnormal........................................................................................................................................... 946 Failure code [DGT1KX] T/C oil temp sensor: Abnormal........................................................................................................................................... 948 Failure code [DGT5KA] F exhaust temp sensor disconnection..................................................................................................................................... 950 Failure code [DGT5KB] F exhaust temp sensor short circuit..................................................................................................................................... 952 Failure code [DGT6KA] R exhaust temp sensor disconnection..................................................................................................................................... 954 Failure code [DGT6KB] R exhaust temp sensor short circuit..................................................................................................................................... 956 Failure code [DH21KA] Weq pressure sensor: Disconnection...................................................................................................................................... 958 Failure code [DH21KB] Weq pressure sensor: Short circuit...................................................................................................................................... 960 Failure code [DHE5KB] ENG blow-by pressure sensor disconnection............................................................................................................................... 962 Failure code [DHE5KY] ENG blow-by pressure sensor short circuit............................................................................................................................... 964 Failure code [DHT3KX] T/M oil pressure sensor abnormality..................................................................................................................................... 966 Failure code [DHT5KA] T/C in-pressure sensor: Disconnection................................................................................................................................... 968 Failure code [DHT5KB] T/C in-pressure sensor: Short circuit................................................................................................................................... 970 Failure code [DHT7KA] T/C out-pressure sensor: Disconnection.................................................................................................................................. 972 Failure code [DHT7KB] T/C out-pressure sensor: Short circuit.................................................................................................................................. 974 Failure code [DK10KA] Fuel control Dial: Disconnection........................................................................................................................................ 976 Failure code [DK10KB] Fuel control Dial: Short circuit........................................................................................................................................ 978 Failure code [DK30KA] ST lever 1: Disconnection............................................................................................................................................... 980 Failure code [DK30KB] ST lever 1: Short circuit............................................................................................................................................... 982 Failure code [DK30KX] ST lever: Out of normal range........................................................................................................................................... 984 Failure code [DK30KZ] ST lever: Disconnection or short circuit................................................................................................................................ 984 Failure code [DK30L8] ST lever: Signal mismatch............................................................................................................................................... 985 Failure code [DK31KA] ST lever 2: Disconnection............................................................................................................................................... 986 Failure code [DK31KB] ST lever 2: Short circuit............................................................................................................................................... 988 Failure code [DK40KA] Brake potentiometer: Disconnection...................................................................................................................................... 990 Failure code [DK40KB] Brake potentiometer: Short circuit...................................................................................................................................... 992 Failure code [DK55KX] FR lever: Out of normal range........................................................................................................................................... 994 Failure code [DK55KZ] FR lever: Disconnection or short circuit................................................................................................................................ 994 Failure code [DK55L8] FR lever: Signal mismatch............................................................................................................................................... 995 Failure code [DK56KA] FR lever 1: Disconnection............................................................................................................................................... 996 Failure code [DK56KB] FR lever 1: Short circuit............................................................................................................................................... 998 Failure code [DK57KA] FR lever 2: Disconnection...............................................................................................................................................1000 Failure code [DK57KB] FR lever 2: Short circuit...............................................................................................................................................1002 Failure code [DK60KA] Acceleration sensor: Disconnection......................................................................................................................................1004 Failure code [DK60KB] Acceleration sensor: Short circuit......................................................................................................................................1006 Failure code [DKH1KA] Pitch angle sensor: Disconnection.......................................................................................................................................1008 Failure code [DKH1KB] Pitch angle sensor: Short circuit.......................................................................................................................................1010 Failure code [DLF1KA] T/C out-speed sensor: Disconnection.....................................................................................................................................1012 Failure code [DLM3KA] Fan rev. sensor: Disconnection..........................................................................................................................................1013 Failure code [DLM3MB] Fan control: Decline....................................................................................................................................................1014 Failure code [DLT3KA] T/M out-speed sensor: Disconnection.....................................................................................................................................1015 Failure code [DLT3KB] T/M out-speed sensor: Abnormal..........................................................................................................................................1016 Failure code [DW59KA] Blade dual selector SOL disconnection...................................................................................................................................1017 Failure code [DW59KB] Blade dual selector SOL short circuit...................................................................................................................................1018 Failure code [DW59KY] Blade dual selector SOL hot short.......................................................................................................................................1019 Failure code [DW5AKA] Blade pitch selector SOL disconnection..................................................................................................................................1020 Failure code [DW5AKB] Blade pitch selector SOL short circuit..................................................................................................................................1021 Failure code [DW5AKY] Blade pitch selector SOL Short circuit..................................................................................................................................1022 Failure code [DW7BKA] Fan rev EPC: Disconnection..............................................................................................................................................1023 Failure code [DW7BKB] Fan rev EPC: Short circuit..............................................................................................................................................1024 Failure code [DWN3KA] Ssp solenoid: Disconnection.............................................................................................................................................1025 Failure code [DWN3KB] Ssp solenoid: Short circuit.............................................................................................................................................1026 Failure code [DWN3KY] SSP solenoid: Short circuit.............................................................................................................................................1028 Failure code [DWN5KA] Fan pump solenoid 1: Disconnection......................................................................................................................................1030 Failure code [DWN5KB] Fan pump solenoid 1: Short circuit......................................................................................................................................1031 Failure code [DWN5KY] Fan pump solenoid 1: Short circuit......................................................................................................................................1032 Failure code [DWNCKA] Fan pump solenoid 2: Disconnection......................................................................................................................................1034 Failure code [DWNCKB] Fan pump solenoid 2: Short circuit......................................................................................................................................1035 Failure code [DWNCKY] Fan pump solenoid 2: Short circuit......................................................................................................................................1036 Failure code [DXH1KA] Lock-up ECMV: Disconnection.............................................................................................................................................1038 Failure code [DXH1KB] Lock-up ECMV: Short circuit.............................................................................................................................................1039 Failure code [DXH1KY] Lock-up ECMV: Short circuit.............................................................................................................................................1040 Failure code [DXH4KA] 1st clutch ECMV: Disconnection..........................................................................................................................................1042 Failure code [DXH4KB] 1st clutch ECMV: Short circuit..........................................................................................................................................1043 Failure code [DXH4KY] 1st clutch ECMV: Short circuit..........................................................................................................................................1044 Failure code [DXH5KA] 2nd clutch ECMV: Disconnection..........................................................................................................................................1046 Failure code [DXH5KB] 2nd clutch ECMV: Short circuit..........................................................................................................................................1047 Failure code [DXH5KY] 2nd clutch ECMV: Short circuit..........................................................................................................................................1048 Failure code [DXH6KA] 3rd clutch ECMV: Disconnection..........................................................................................................................................1050 Failure code [DXH6KB] 3rd clutch ECMV: Short circuit..........................................................................................................................................1051 Failure code [DXH6KY] 3rd clutch ECMV: Short circuit..........................................................................................................................................1052 Failure code [DXH7KA] R clutch ECMV: Disconnection............................................................................................................................................1054 Failure code [DXH7KB] R clutch ECMV: Short circuit............................................................................................................................................1055 Failure code [DXH7KY] R clutch ECMV: Short circuit............................................................................................................................................1056 Failure code [DXH8KA] F clutch ECMV: Disconnection............................................................................................................................................1058 Failure code [DXH8KB] F clutch ECMV: Short circuit............................................................................................................................................1059 Failure code [DXH8KY] F clutch ECMV: Short circuit............................................................................................................................................1060 Failure code [DXH9KA] Right clutch ECMV: Disconnection........................................................................................................................................1062 Failure code [DXH9KB] Right clutch ECMV: Short circuit........................................................................................................................................1063 Failure code [DXH9KY] Right clutch ECMV: Short circuit........................................................................................................................................1064 Failure code [DXHAKA] Left clutch ECMV: Disconnection.........................................................................................................................................1066 Failure code [DXHAKB] Left clutch ECMV: Short circuit.........................................................................................................................................1067 Failure code [DXHAKY] Left clutch ECMV: Short circuit.........................................................................................................................................1068 Failure code [DXHBKA] Right brake ECMV: Disconnection.........................................................................................................................................1070 Failure code [DXHBKB] Right brake ECMV: Short circuit.........................................................................................................................................1071 Failure code [DXHBKY] Right brake ECMV: Short circuit.........................................................................................................................................1072 Failure code [DXHCKA] Left brake ECMV: Disconnection..........................................................................................................................................1074 Failure code [DXHCKB] Left brake ECMV: Short circuit..........................................................................................................................................1075 Failure code [DXHCKY] Left brake ECMV: Short circuit..........................................................................................................................................1076 Failure code [DXJBKA] S/C ECMV: Disconnection.................................................................................................................................................1078 Failure code [DXJBKB] S/C ECMV: Short circuit.................................................................................................................................................1079 Failure code [DXJBKY] S/C ECMV: Short circuit.................................................................................................................................................1080 Failure code [DY2HKA] Pre lub. motor: Disconnection...........................................................................................................................................1082 Failure code [F@BBZL] ENG blow-by pressure high level.........................................................................................................................................1084 Failure code [F@BYNR] F exhaust temp high level (2)...........................................................................................................................................1085 Failure code [F@BYNS] F exhaust temp high level (1)...........................................................................................................................................1086 Failure code [F@BZNR] R exhaust temp high level (2)...........................................................................................................................................1087 Failure code [F@BZNS] R exhaust temp high level (1)...........................................................................................................................................1088 Troubleshooting of electrical system (E-mode).....................................................................................................................................................1089 Information contained in troubleshooting table................................................................................................................................................1089 E-1 Engine does not start (starting motor does not turn)......................................................................................................................................1091 E-2 Preheater does not operate................................................................................................................................................................1094 E-3 When starting switch is turned ON, machine monitor displays nothing.......................................................................................................................1098 E-4 When starting switch is turned ON (before starting engine), basic check item lights up....................................................................................................1100 E-5 Precaution item lights up while engine is running.........................................................................................................................................1102 E-6 Emergency stop item lights up while engine is running.....................................................................................................................................1104 E-7 Engine coolant temperature gauge does not indicate normally...............................................................................................................................1105 E-8 Fuel gauge does not indicate properly.....................................................................................................................................................1106 E-9 Power train oil temperature gauge (multi-gauge) does not indicate normally................................................................................................................1108 E-10 Hydraulic temperature gauge (multi-gauge) does not indicate normally.....................................................................................................................1109 E-11 Contents of display by machine monitor are different from applicable machine.............................................................................................................1110 E-12 Machine monitor does not display some items..............................................................................................................................................1110 E-13 Function switch does not work............................................................................................................................................................1110 E-14 Operation mode does not change...........................................................................................................................................................1111 E-15 Gearshift mode does not change...........................................................................................................................................................1111 E-16 Customize function does not operate normally.............................................................................................................................................1112 E-17 Customize memory function does not operate normally......................................................................................................................................1112 E-18 Alarm buzzer does not sound or does not stop.............................................................................................................................................1113 E-19 When starting switch is turned OFF, service meter is not displayed.......................................................................................................................1113 E-20 Machine monitor cannot be set in service mode............................................................................................................................................1113 E-21 The ripper pin puller cylinder does not operate..........................................................................................................................................1114 E-22 Horn does not sound or does not stop.....................................................................................................................................................1116 E-23 Back-up alarm does not sound or does not stop............................................................................................................................................1118 E-24 Fan does not reverse.....................................................................................................................................................................1120 E-25 The head lamp and rear lamp do not light up..............................................................................................................................................1121 E-26 Windshield wiper does not operate........................................................................................................................................................1128 E-27 Window washer does not operate...........................................................................................................................................................1134 E-28 Electric priming pump does not operate or does not stop automatically....................................................................................................................1140 E-29 Orbcomm terminal does not operate normally (Data are not transmitted)....................................................................................................................1142 E-30 Gear cannot be shifted...................................................................................................................................................................1144 Troubleshooting of hydraulic and mechanical system (H-mode).......................................................................................................................................1145 Information in troubleshooting table..........................................................................................................................................................1145 List of Failure Modes and Causes..............................................................................................................................................................1146 H-1 Machine lacks power(or drawbar pull)......................................................................................................................................................1148 H-2 Machine cannot travel (at 2nd or 3rd each speed)..........................................................................................................................................1150 H-3 Machine cannot travel at any gear speeds..................................................................................................................................................1151 H-4 Machine travels only in one direction, forward or reverse.................................................................................................................................1152 H-5 Large time lag at gear shifting or directional change.....................................................................................................................................1153 H-6 Machine connot turn.......................................................................................................................................................................1154 H-7 Machine turns only to one side............................................................................................................................................................1155 H-8 Machine overruns at turnning..............................................................................................................................................................1156 H-9 Brake does not work.......................................................................................................................................................................1156 H-10 Torque converter does not lock up........................................................................................................................................................1157 H-11 Power train oil overheats................................................................................................................................................................1158 H-12 All work equipment operates too slow or lacks power......................................................................................................................................1159 H-13 All work equipment does not operate......................................................................................................................................................1160 H-14 Blade lift cylinder speed is too slow or lacks power.....................................................................................................................................1161 H-15 Blade tilt cylinder speed is too slow or lacks power.....................................................................................................................................1161 H-16 Ripper lift cylinder speed is too slow or lacks power....................................................................................................................................1162 H-17 Ripper tilt cylinder speed is too slow or lacks power....................................................................................................................................1162 H-18 Excessive hydraulic drift of blade lift cylinder.........................................................................................................................................1163 H-19 Excessive hydraulic drift of blade tilt cylinder.........................................................................................................................................1163 H-20 Excessive hydraulic drift of ripper lift cylinder........................................................................................................................................1164 H-21 Ripper pin puller cylinder does not operate (machine with giant ripper)..................................................................................................................1164 H-22 Blade pitch does not work (machine with dual tilt specification).........................................................................................................................1165 H-23 Abnormal noise from around work equipment pump...........................................................................................................................................1165 H-24 Abnormal fan rotation(noise and/or vibration are abnormally large or engine overheats)...................................................................................................1166 Troubleshooting of engine (S-mode)................................................................................................................................................................1168 Method of using troubleshooting chart.........................................................................................................................................................1168 S-1 Engine does not start easily..............................................................................................................................................................1172 S-2 Engine does not start.....................................................................................................................................................................1174 S-3 Engine does not rev up smoothly (response-up is poor).....................................................................................................................................1178 S-4 Engine stops during operation.............................................................................................................................................................1180 S-5 Engine does not rotate smoothly (hunting).................................................................................................................................................1181 S-6 Engine lacks power (or output shortage)...................................................................................................................................................1182 S-7 Exhaust smoke is black (Incomplete combustion)............................................................................................................................................1184 S-8 Oil is consumption is excessive(or exhaust smoke is blue).................................................................................................................................1186 S-9 Engine oil becomes contaminated quickly...................................................................................................................................................1187 S-10 Fuel consumption is excessive............................................................................................................................................................1188 S-11 Oil mixes into coolant(coolant blows back or is reduced).................................................................................................................................1189 S-12 Engine pressure monitor lights up (drop in engine oil pressure)..........................................................................................................................1190 S-13 Oil level rises (Coolant or fuel mixes into oil).........................................................................................................................................1191 S-14 Coolant temperature rises too high (overheating).........................................................................................................................................1193 S-15 Abnormal noise is heard..................................................................................................................................................................1194 S-16 Vibration is excessive...................................................................................................................................................................1195 S-17 Air cannot be bled from fuel circuit (when air bleeding is performed after filter is replaced or fuel is used up and then air is bled, engine does not start or it starts but stalls)....1196 50 Disassembly and assembly...........................................................................................................................................................................1199 General information on disassembly and assembly...................................................................................................................................................1202 How to read this manual.......................................................................................................................................................................1202 Coating materials list........................................................................................................................................................................1204 Special tools list............................................................................................................................................................................1207 Sketches of special tools.....................................................................................................................................................................1214 Engine and cooling system.........................................................................................................................................................................1222 Removal and installation of fuel supply pump assembly.........................................................................................................................................1222 Removal and installation of fuel injector assembly............................................................................................................................................1226 Removal and installation of cylinder head assembly............................................................................................................................................1231 Removal and installation of radiator guard assembly...........................................................................................................................................1247 Removal and installation of cooling assembly (radiator, after cooler, and hydraulic oil cooler)...............................................................................................1252 Removal and installation of radiator..........................................................................................................................................................1257 Removal and installation of hydraulic oil cooler..............................................................................................................................................1259 Removal and installation of aftercooler.......................................................................................................................................................1260 Removal and installation of engine assembly...................................................................................................................................................1261 Removal and installation of engine hood assembly..............................................................................................................................................1268 Removal and installation of engine front seal.................................................................................................................................................1271 Removal and installation of engine rear seal..................................................................................................................................................1273 Removal and installation of fan drive assembly................................................................................................................................................1277 Removal and installation of fan motor assembly................................................................................................................................................1279 Removal and installation of fuel tank assembly................................................................................................................................................1281 Power train.......................................................................................................................................................................................1284 Removal and installation of damper assembly...................................................................................................................................................1284 Disassembly and assembly of damper assembly...................................................................................................................................................1288 Removal and installation of power train unit assembly.........................................................................................................................................1291 Disconnection and connection of power train unit assembly.....................................................................................................................................1298 Disassembly and assembly of PTO assembly......................................................................................................................................................1307 Disassembly and assembly of torque converter assembly.........................................................................................................................................1313 Disassembly and assembly of TORQFLOW transmission assembly....................................................................................................................................1323 Disassembly and assembly of steering case assembly............................................................................................................................................1351 Removal and installation of power train pump and lubrication pump assembly....................................................................................................................1367 Removal and installation of scavenging pump assembly..........................................................................................................................................1368 Removal and installation of final drive assembly..............................................................................................................................................1369 Disassembly and assembly of final drive assembly..............................................................................................................................................1371 Undercarriage and frame...........................................................................................................................................................................1384 Removal and installation of track frame assembly..............................................................................................................................................1384 Removal and installation of idler assembly....................................................................................................................................................1389 Disassembly and assembly of idler assembly....................................................................................................................................................1390 Removal and installation of recoil spring assembly............................................................................................................................................1394 Disassembly and assembly of recoil spring assembly............................................................................................................................................1399 Removal and installation of track roller assembly.............................................................................................................................................1401 Disassembly and assembly of track roller assembly.............................................................................................................................................1404 Removal and installation of carrier roller assembly...........................................................................................................................................1407 Disassembly and assembly of carrier roller assembly...........................................................................................................................................1408 Removal and installation of bogie assembly....................................................................................................................................................1412 Disassembly and assembly of bogie assembly....................................................................................................................................................1417 Removal and installation of first bogie assembly..............................................................................................................................................1419 Separation and connection of track shoe assembly..............................................................................................................................................1424 Overall disassembly and assembly of track shoe................................................................................................................................................1428 Link press press-fitting jig dimensions.......................................................................................................................................................1445 Disassembly and assembly of one link assembly in the field....................................................................................................................................1446 Disassembly and assembly of master link.......................................................................................................................................................1451 Removal and installation of pivot shaft assembly..............................................................................................................................................1455 Removal and installation of equalizer bar.....................................................................................................................................................1456 Disassembly and assembly of equalizer bar bushing.............................................................................................................................................1460 Removal and installation of segment tooth.....................................................................................................................................................1462 Hydraulic system..................................................................................................................................................................................1464 Removal and installation of hydraulic tank assembly...........................................................................................................................................1464 Removal and installation of work equipment pump assembly......................................................................................................................................1467 Removal and installation of fan pump assembly.................................................................................................................................................1471 Removal and installation of control valve assembly............................................................................................................................................1473 Disassembly and assembly of control valve assembly............................................................................................................................................1475 Disassembly and assembly of blade PPC valve assembly..........................................................................................................................................1480 Disassembly and assembly of ripper PPC valve assembly.........................................................................................................................................1483 Disassembly and assembly of hydraulic cylinder assembly.......................................................................................................................................1485 Disassembly and assembly of ripper pin puller cylinder assembly...............................................................................................................................1493 Work equipment....................................................................................................................................................................................1496 Removal and installation of blade assembly....................................................................................................................................................1496 Disassembly and assembly of blade assembly....................................................................................................................................................1498 Disassembly and assembly of giant ripper assembly.............................................................................................................................................1502 Cab and its attachments...........................................................................................................................................................................1506 Removal and installation of ROPS guard........................................................................................................................................................1506 Removal and installation of operator’s cab assembly...........................................................................................................................................1507 Removal and installation of floor frame assembly..............................................................................................................................................1511 Removal and installation of air conditioner unit assembly.....................................................................................................................................1516 Electrical system.................................................................................................................................................................................1526 Removal and installation of transmission controller assembly and steering controller assembly.................................................................................................1526 Removal and installation of engine controller assembly........................................................................................................................................1527 Removal and installation of VHMS controller assembly..........................................................................................................................................1529 Removal and installation of machine monitor assembly..........................................................................................................................................1530 60 Maintenance Standard...............................................................................................................................................................................1533 Engine and cooling system.........................................................................................................................................................................1535 Engine mount..................................................................................................................................................................................1535 Cooling fan pump..............................................................................................................................................................................1537 Cooling fan motor.............................................................................................................................................................................1544 Power train.......................................................................................................................................................................................1546 Power train unit..............................................................................................................................................................................1546 Damper and universal joint....................................................................................................................................................................1548 Torque converter and PTO......................................................................................................................................................................1551 Main relief valve and torque converter relief valve...........................................................................................................................................1554 Lockup clutch ECMV and stator clutch ECMV.....................................................................................................................................................1555 Scavenging pump...............................................................................................................................................................................1556 Transmission control..........................................................................................................................................................................1557 Transmission..................................................................................................................................................................................1558 Transmission lubricating oil relief valve.....................................................................................................................................................1562 Power train and lubrication pump..............................................................................................................................................................1563 Transfer, bevel gear shaft and steering unit..................................................................................................................................................1564 Steering control valve........................................................................................................................................................................1570 Steering clutch ECMV and steering brake ECMV..................................................................................................................................................1571 Parking brake valve...........................................................................................................................................................................1572 Final drive...................................................................................................................................................................................1573 Sprocket......................................................................................................................................................................................1576 Undercarriage and frame...........................................................................................................................................................................1578 Track frame...................................................................................................................................................................................1578 Idler cushion.................................................................................................................................................................................1580 Idler.........................................................................................................................................................................................1582 Track roller..................................................................................................................................................................................1584 Carrier roller................................................................................................................................................................................1586 Track roller bogie............................................................................................................................................................................1587 Track shoe....................................................................................................................................................................................1588 Main frame....................................................................................................................................................................................1592 Suspension....................................................................................................................................................................................1594 Hydraulic system..................................................................................................................................................................................1599 PPC valve.....................................................................................................................................................................................1599 Hydraulic cylinder............................................................................................................................................................................1604 Quick drop valve..............................................................................................................................................................................1607 Work equipment pump...........................................................................................................................................................................1608 Control valve.................................................................................................................................................................................1611 Self-pressure reducing valve..................................................................................................................................................................1623 Work equipment....................................................................................................................................................................................1625 Cylinder stay.................................................................................................................................................................................1625 Blade.........................................................................................................................................................................................1626 Cutting edge and end bit......................................................................................................................................................................1630 Ripper........................................................................................................................................................................................1632 80 Appendix...........................................................................................................................................................................................1635 Air Conditioner...................................................................................................................................................................................1637 Caution about refrigerant.....................................................................................................................................................................1637 Air conditioner component.....................................................................................................................................................................1638 Configuration and function of refrigeration cycle.............................................................................................................................................1640 Outline of refrigeration cycle................................................................................................................................................................1641 Air conditioner unit..........................................................................................................................................................................1644 Blower unit...................................................................................................................................................................................1648 FRESH/RECIRC air changeover damper............................................................................................................................................................1649 Compressor....................................................................................................................................................................................1650 Condenser.....................................................................................................................................................................................1651 Receiver drier................................................................................................................................................................................1652 Air conditioner control panel.................................................................................................................................................................1654 Procedure for testing and troubleshooting.....................................................................................................................................................1656 Circuit diagram and arrangement of connector pins.............................................................................................................................................1658 System diagram................................................................................................................................................................................1660 Part and connector locations..................................................................................................................................................................1662 Testing temperature control...................................................................................................................................................................1666 Testing FRESH/RECIC air changeover............................................................................................................................................................1666 Testing relay.................................................................................................................................................................................1668 Troubleshooting chart 1.......................................................................................................................................................................1670 Troubleshooting chart 2.......................................................................................................................................................................1672 Information in troubleshooting table..........................................................................................................................................................1674 Troubleshooting for power supply system (Air conditioner does not operate)....................................................................................................................1676 Troubleshooting for compressor system (Air is not cooled).....................................................................................................................................1678 Troubleshooting for blower motor system (Air does not come out or air flow is abnormal).......................................................................................................1682 Troubleshooting for temperature control.......................................................................................................................................................1688 Troubleshooting for FRESH/RECIRC air changeover...............................................................................................................................................1690 Troubleshooting with gauge pressure...........................................................................................................................................................1692 Connection of service tool....................................................................................................................................................................1694 Precautions for disconnecting and connecting..................................................................................................................................................1696 Handling of compressor oil....................................................................................................................................................................1698 90 Diagrams and Drawings..............................................................................................................................................................................1701 Hydraulic diagrams and drawings...................................................................................................................................................................1703 Symbols used in hydrauric cirxuit diagrams....................................................................................................................................................1703 Power train hydraulic circuit diagram.........................................................................................................................................................1705 Hydraulic circuit diagram.....................................................................................................................................................................1706 Electrical diagrams and drawings..................................................................................................................................................................1708 Symbol use in electric circuit diagram........................................................................................................................................................1708 Electrical circuit diagram....................................................................................................................................................................1712 INDEX.................................................................................................................................................................................................1726
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KOMATSU D375A-6 BULLDOZER SERVICE REPAIR MANUAL – PDF DOWNLOAD:
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