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KOMATSU D155A-6 BULLDOZER SHOP MANUAL SEN02854-16 – PDF DOWNLOAD
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Description
KOMATSU D155A-6 BULLDOZER SHOP MANUAL SEN02854-16 – PDF DOWNLOAD
FILE DETAILS:
KOMATSU D155A-6 BULLDOZER SHOP MANUAL SEN02854-16 – PDF DOWNLOAD
Language : English
Pages : 1732
Downloadable : Yes
File Type : PDF
IMAGES PREVIEW OF THE MANUAL:
TABLE OF CONTENTS:
KOMATSU D155A-6 BULLDOZER SHOP MANUAL SEN02854-16 – PDF DOWNLOAD
Cover................................................................................................... 1 00 Index and foreword................................................................................... 3 Index............................................................................................... 3 Composition of shop manual...................................................................... 4 Table of contents............................................................................... 6 Foreword and general information.................................................................... 17 Safety notice................................................................................... 18 How to read the shop manual..................................................................... 23 Explanation of terms for maintenance standard................................................... 25 Handling of electric equipment and hydraulic component.......................................... 27 Handling of connectors newly used for engines................................................... 36 How to read electric wire code.................................................................. 39 Precautions when carrying out operation......................................................... 42 Method of disassembling and connecting push-pull type coupler................................... 45 Standard tightening torque table................................................................ 48 Conversion table................................................................................ 52 01 Specification........................................................................................ 59 Specification and technical data.................................................................... 59 Specification dimension drawings................................................................ 60 Specifications.................................................................................. 61 Weight table.................................................................................... 67 Table of fuel, coolant and lubricants........................................................... 70 10 Structure, function and maintenance standard......................................................... 73 Engine and cooling system........................................................................... 73 Radiator, oil cooler............................................................................ 74 Engine mount.................................................................................... 81 Cooling fan pump................................................................................ 82 Cooling fan motor............................................................................... 90 Power train, Part 1................................................................................. 97 Power train skeleton............................................................................ 98 Overall drawing of power train unit............................................................. 100 Power train hydraulic piping drawing............................................................ 102 Damper, universal joint......................................................................... 104 Torque converter, PTO........................................................................... 106 Transmission.................................................................................... 114 Transmission ECMV............................................................................... 130 Main relief valve and torque converter relief valve............................................. 136 Lubricating oil relief valve.................................................................... 138 Scavenging pump................................................................................. 140 Power train and steering lubrication pump....................................................... 142 Power train, Part 2................................................................................. 145 Work equipment pump............................................................................. 146 Work equipment cooler bypass valve.............................................................. 159 Steering, brake control......................................................................... 160 Steering unit................................................................................... 162 Steering control valve.......................................................................... 176 Steering clutch ECMV, steering brake ECMV....................................................... 178 Parking brake solenoid valve.................................................................... 184 Sudden stop prevention valve.................................................................... 186 Final drive..................................................................................... 189 Sprocket........................................................................................ 194 Undercarriage and frame............................................................................. 197 Track frame..................................................................................... 198 Recoil spring................................................................................... 200 Idler........................................................................................... 202 Track roller.................................................................................... 204 Carrier roller.................................................................................. 206 Track shoe...................................................................................... 208 Main frame...................................................................................... 214 Suspension...................................................................................... 216 Hydraulic system.................................................................................... 219 Work equipment hydraulic piping diagram......................................................... 220 Work equipment control piping diagram........................................................... 224 Work equipment control.......................................................................... 226 Hydraulic tank and filter....................................................................... 228 Accumulator..................................................................................... 231 PPC valve....................................................................................... 232 Work equipment lock valve....................................................................... 244 Control valve................................................................................... 246 Work equipment cylinder......................................................................... 268 Piston valve.................................................................................... 270 Quick drop valve................................................................................ 272 Self pressure reducing valve.................................................................... 273 Work equipment...................................................................................... 281 Cylinder stay................................................................................... 282 Blade........................................................................................... 284 Ripper.......................................................................................... 288 Cutting edge, end bit........................................................................... 286 Cab and its attachments............................................................................. 295 Cab mount + ROPS pin............................................................................ 296 ROPS cab........................................................................................ 297 ROPS floor...................................................................................... 298 Air conditioner................................................................................. 299 Electrical system................................................................................... 301 Engine control.................................................................................. 302 Engine control system........................................................................... 303 Deceleration potentiometer...................................................................... 304 Monitor system.................................................................................. 306 Sensors......................................................................................... 325 Palm command control system..................................................................... 328 KOMTRAX system.................................................................................. 331 20 Standard value table................................................................................. 335 Standard service value table........................................................................ 335 Standard value table for engine................................................................. 336 Standard value table for machine................................................................ 337 30 Testing and adjusting................................................................................ 347 Testing and adjusting, Part 1....................................................................... 347 Tools for testing, adjusting, and troubleshooting............................................... 349 Sketches of special tools....................................................................... 353 Measuring engine speed.......................................................................... 354 Measuring intake air pressure (boost pressure).................................................. 356 Measuring exhaust temperature................................................................... 358 Measuring exhaust gas color..................................................................... 360 Adjusting valve clearance....................................................................... 361 Measuring compression pressure.................................................................. 362 Measuring blow-by pressure...................................................................... 364 Measuring engine oil pressure................................................................... 365 Handling fuel system parts...................................................................... 366 Releasing residual pressure from fuel system.................................................... 366 Measuring fuel pressure......................................................................... 367 Measuring fuel return rate and fuel leakage..................................................... 368 Bleeding air from fuel circuit.................................................................. 372 Measuring fuel circuit for leakage.............................................................. 374 Testing and adjusting alternator belt tension................................................... 375 Testing and adjusting air conditioner compressor belt tension................................... 376 Measuring fan speed............................................................................. 377 Measuring fan circuit oil pressure.............................................................. 379 Bleeding air from fan pump...................................................................... 380 Bleeding air from work equipment pump........................................................... 381 Adjusting fuel control dial and decelerator pedal............................................... 382 Testing and adjusting, Part 2....................................................................... 385 Measuring power train oil pressure.............................................................. 387 Adjusting transmission output shaft speed sensor................................................ 395 Simple test procedure for brake performance..................................................... 396 Adjusting brake pedal........................................................................... 397 Adjusting parking brake lever................................................................... 399 Emergency escape method when power train has trouble............................................ 401 Adjusting idler clearance....................................................................... 404 Testing and adjusting track shoe tension........................................................ 406 Measuring and adjusting work equipment oil pressure............................................. 407 Measuring control circuit basic pressure........................................................ 410 Measuring work equipment lock solenoid valve output pressure (PPC valve basic pressure)......... 411 Measuring PPC valve output pressure............................................................. 412 Adjusting work equipment PPC valve play......................................................... 414 Measuring ripper pin puller solenoid valve output pressure...................................... 416 Testing parts which cause hydraulic drift of blade and ripper................................... 417 Measuring internal leakage of work equipment cylinder........................................... 418 Releasing residual pressure from work equipment cylinder........................................ 419 Bleeding air from work equipment cylinder....................................................... 419 Adjusting work equipment lock lever............................................................. 420 Adjusting blade................................................................................. 421 Adjusting operator's cab........................................................................ 423 Testing and adjusting, Part 3....................................................................... 429 Special functions of machine monitor (EMMS)..................................................... 430 Testing and adjusting, Part 4....................................................................... 491 Handling of power supply circuit of engine controller........................................... 492 Preparation work for troubleshooting of electrical system....................................... 493 Pm Clinic....................................................................................... 495 40 Troubleshooting...................................................................................... 507 Failure code table and fuse locations............................................................... 507 Failure codes table............................................................................. 508 Fuse locations.................................................................................. 514 General information on troubleshooting.............................................................. 519 Points to remember when troubleshooting......................................................... 520 Sequence of events in troubleshooting........................................................... 521 Check before troubleshooting.................................................................... 522 Classification and procedures for troubleshooting............................................... 523 Information in troubleshooting table............................................................ 526 Connection table for connector pin numbers...................................................... 528 T- branch box and T- branch adapter table....................................................... 564 Troubleshooting by failure and error codes, Part 1.................................................. 569 Failure code [1500L0]........................................................................... 571 Failure code [15SAL1]........................................................................... 572 Failure code [15SALH]........................................................................... 574 Failure code [15SBL1]........................................................................... 576 Failure code [15SBLH]........................................................................... 578 Failure code [15SEL1]........................................................................... 580 Failure code [15SELH]........................................................................... 582 Failure code [15SFL1]........................................................................... 584 Failure code [15SFLH]........................................................................... 586 Failure code [15SGL1]........................................................................... 588 Failure code [15SGLH]........................................................................... 590 Failure code [2201L1]........................................................................... 592 Failure code [2201LH]........................................................................... 594 Failure code [2202L1]........................................................................... 596 Failure code [2202LH]........................................................................... 598 Failure code [2300KM]........................................................................... 600 Failure code [2301L1]........................................................................... 601 Failure code [2301LH]........................................................................... 603 Failure code [2302L1]........................................................................... 605 Failure code [2302LH]........................................................................... 607 Failure code [7RFAKA]........................................................................... 609 Failure code [AA10NX]........................................................................... 611 Failure code [AB00MA]........................................................................... 613 Failure code [B@BAZG]........................................................................... 615 Failure code [B@BCNS]........................................................................... 616 Failure code [B@BCZK]........................................................................... 617 Failure code [B@CENS]........................................................................... 618 Failure code [B@HANS]........................................................................... 619 Failure code [CA111]............................................................................ 620 Failure code [CA115]............................................................................ 622 Failure code [CA122]............................................................................ 624 Failure code [CA123]............................................................................ 627 Failure code [CA131]............................................................................ 628 Failure code [CA132]............................................................................ 630 Failure code [CA135]............................................................................ 631 Failure code [CA141]............................................................................ 634 Failure code [CA144]............................................................................ 635 Failure code [CA145]............................................................................ 637 Failure code [CA153]............................................................................ 638 Failure code [CA154]............................................................................ 640 Failure code [CA187]............................................................................ 640 Failure code [CA221]............................................................................ 641 Failure code [CA222]............................................................................ 644 Failure code [CA227]............................................................................ 645 Troubleshooting by failure and error codes, Part 2.................................................. 649 Failure code [CA234]............................................................................ 651 Failure code [CA238]............................................................................ 652 Failure code [CA263]............................................................................ 654 Failure code [CA265]............................................................................ 656 Failure code [CA271]............................................................................ 657 Failure code [CA272]............................................................................ 659 Failure code [CA273]............................................................................ 661 Failure code [CA274]............................................................................ 663 Failure code [CA322]............................................................................ 665 Failure code [CA323]............................................................................ 667 Failure code [CA324]............................................................................ 669 Failure code [CA325]............................................................................ 671 Failure code [CA331]............................................................................ 673 Failure code [CA332]............................................................................ 675 Failure code [CA342]............................................................................ 677 Failure code [CA351]............................................................................ 678 Failure code [CA352]............................................................................ 681 Failure code [CA386]............................................................................ 682 Failure code [CA441]............................................................................ 684 Failure code [CA442]............................................................................ 684 Failure code [CA449]............................................................................ 685 Failure code [CA451]............................................................................ 686 Failure code [CA452]............................................................................ 689 Failure code [CA553]............................................................................ 690 Failure code [CA554]............................................................................ 692 Failure code [CA559]............................................................................ 693 Failure code [CA689]............................................................................ 699 Failure code [CA731]............................................................................ 702 Failure code [CA757]............................................................................ 703 Failure code [CA778]............................................................................ 704 Failure code [CA1633]........................................................................... 707 Failure code [CA2185]........................................................................... 709 Failure code [CA2186]........................................................................... 711 Failure code [CA2249]........................................................................... 711 Failure code [CA2555]........................................................................... 712 Failure code [CA2556]........................................................................... 713 Failure code [D110KA]........................................................................... 715 Failure code [D110KB]........................................................................... 717 Failure code [D130KA]........................................................................... 719 Failure code [D130KB]........................................................................... 722 Failure code [D161KA]........................................................................... 724 Failure code [D161KB]........................................................................... 726 Failure code [D190KA]........................................................................... 728 Failure code [D190KB]........................................................................... 730 Troubleshooting by failure and error codes, Part 3.................................................. 733 Failure code [D5ZKKX]........................................................................... 735 Failure code [DAFRKR]........................................................................... 738 Failure code [DB2RKR]........................................................................... 740 Failure code [DB90KR]........................................................................... 743 Failure code [DBE0KK]........................................................................... 745 Failure code [DBE0KT]........................................................................... 748 Failure code [DBE6KK]........................................................................... 749 Failure code [DBE7KK]........................................................................... 751 Failure code [DBE9KQ]........................................................................... 754 Failure code [DD12KA]........................................................................... 756 Failure code [DD12KB]........................................................................... 758 Failure code [DD13KA]........................................................................... 760 Failure code [DD13KB]........................................................................... 762 Failure code [DD14KA]........................................................................... 764 Failure code [DD14KB]........................................................................... 766 Failure code [DDDDKA]........................................................................... 768 Failure code [DDDDKB]........................................................................... 770 Failure code [DDDDKX]........................................................................... 772 Failure code [DGT1KA]........................................................................... 773 Failure code [DGT1KX]........................................................................... 775 Failure code [DH21KA]........................................................................... 777 Failure code [DH21KB]........................................................................... 779 Failure code [DK10KX]........................................................................... 781 Failure code [DK30KA]........................................................................... 784 Failure code [DK30KB]........................................................................... 786 Failure code [DK30KX]........................................................................... 788 Failure code [DK30KZ]........................................................................... 788 Failure code [DK30L8]........................................................................... 789 Failure code [DK31KA]........................................................................... 790 Failure code [DK31KB]........................................................................... 792 Failure code [DK40KA]........................................................................... 794 Failure code [DK40KB]........................................................................... 796 Failure code [DK55KX]........................................................................... 798 Failure code [DK55KZ]........................................................................... 798 Failure code [DK55L8]........................................................................... 799 Failure code [DK56KA]........................................................................... 800 Failure code [DK56KB]........................................................................... 802 Troubleshooting by failure and error codes, Part 4.................................................. 805 Failure code [DK57KA]........................................................................... 808 Failure code [DK57KB]........................................................................... 810 Failure code [DKH1KA]........................................................................... 812 Failure code [DKH1KB]........................................................................... 814 Failure code [DLT3KA]........................................................................... 816 Failure code [DLT3KB]........................................................................... 818 Failure code [DW7BKA]........................................................................... 820 Failure code [DW7BKB]........................................................................... 822 Failure code [DWN3KA]........................................................................... 824 Failure code [DWN3KB]........................................................................... 826 Failure code [DWN3KY]........................................................................... 828 Failure code [DWN5KA]........................................................................... 830 Failure code [DWN5KB]........................................................................... 832 Failure code [DXH4KA]........................................................................... 834 Failure code [DXH4KB]........................................................................... 836 Failure code [DXH4KY]........................................................................... 838 Failure code [DXH5KA]........................................................................... 840 Failure code [DXH5KB]........................................................................... 842 Failure code [DXH5KY]........................................................................... 844 Failure code [DXH6KA]........................................................................... 846 Failure code [DXH6KB]........................................................................... 848 Failure code [DXH6KY]........................................................................... 850 Failure code [DXH7KA]........................................................................... 852 Failure code [DXH7KB]........................................................................... 854 Failure code [DXH7KY]........................................................................... 856 Failure code [DXH8KA]........................................................................... 858 Failure code [DXH8KB]........................................................................... 860 Failure code [DXH8KY]........................................................................... 862 Failure code [DXH9KA]........................................................................... 864 Failure code [DXH9KB]........................................................................... 866 Failure code [DXH9KY]........................................................................... 868 Failure code [DXHAKA]........................................................................... 870 Failure code [DXHAKB]........................................................................... 872 Failure code [DXHAKY]........................................................................... 874 Failure code [DXHBKA]........................................................................... 876 Failure code [DXHBKB]........................................................................... 878 Failure code [DXHBKY]........................................................................... 880 Failure code [DXHCKA]........................................................................... 882 Failure code [DXHCKB]........................................................................... 884 Failure code [DXHCKY]........................................................................... 886 Failure code [DXJ4KA]........................................................................... 888 Failure code [DXJ4KB]........................................................................... 890 Troubleshooting of electrical system (E-mode)....................................................... 893 Before carrying out troubleshooting for electrical system....................................... 895 Information in troubleshooting table............................................................ 899 E-1 When starting switch turned ON, machine monitor displays nothing............................ 901 E-2 When starting switch turned ON (before starting engine), basic check item lights up......... 904 E-3 Engine does not start (Engine does not turn)................................................ 906 E-4 Preheater does not operate.................................................................. 909 E-5 Precaution item lights up while engine is running........................................... 913 E-6 Emergency stop item lights up while engine is running....................................... 915 E-7 Engine coolant temperature gauge does not indicate normally................................. 919 E-8 Fuel level gauge does not indicate normally................................................. 921 E-9 Power train oil temperature gauge (multi-gauge) does not indicate normally.................. 924 E-10 Hydraulic temperature gauge (multi-gauge) does not indicate normally....................... 926 E-11 Contents of display by machine monitor are different from applicable machine............... 929 E-12 Machine monitor does not display some items................................................ 929 E-13 Function switch does not work.............................................................. 930 E-14 Operation mode does not change............................................................. 931 E-15 Gearshift mode does not change............................................................. 932 E-16 Customize function does not operate normally............................................... 933 E-17 Customize memory function does not operate normally........................................ 934 E-18 Alarm buzzer cannot be stopped............................................................. 935 E-19 Air conditioner does not operate normally (including air conditioner fault history)........ 936 E-20 When starting switch is turned OFF, service meter is not displayed......................... 960 E-21 Machine monitor cannot be set in service mode.............................................. 960 E-22 Ripper pin puller cylinder does not operate................................................ 961 E-23 Backup alarm does not sound or does not stop............................................... 963 E-24 Headlamp, rear lamp, and ripper point lamp do not light up................................. 965 E-25 Windshield wiper and window washer do not operate.......................................... 971 E-26 KOMTRAX terminal does not operate normally................................................. 999 E-27 Fan does not reverse.......................................................................1001 E-28 Gear cannot be shifted.....................................................................1003 E-29 Electric priming pump does not operate or does not stop automatically......................1004 Troubleshooting of hydraulic and mechanical system (H-mode).........................................1009 Information in troubleshooting table............................................................1011 H-1 Power is low (Drawbar pull is low)..........................................................1012 H-2 Machine does not travel (at 2nd or 3rd gear speed)..........................................1014 H-3 Machine does not start at any gear speed....................................................1016 H-4 Machine can travel only forward or in reverse...............................................1018 H-5 When gear speed or travel direction is changed, time lag is large...........................1020 H-6 Steering is not possible....................................................................1022 H-7 Steering is possible only on one side.......................................................1024 H-8 Steering overrun occurs.....................................................................1026 H-9 Brake does not work.........................................................................1027 H-10 Power train oil is overheated..............................................................1029 H-11 Speed of all work equipment is low.........................................................1031 H-12 No work equipment moves....................................................................1033 H-13 Blade lift speed or power is low...........................................................1035 H-14 Blade tilt speed or power is low...........................................................1037 H-15 Ripper lift speed or power is low..........................................................1039 H-16 Ripper tilt speed or power is low..........................................................1041 H-17 Hydraulic drift of blade lift is large.....................................................1043 H-18 Hydraulic drift of blade tilt is large.....................................................1044 H-19 Hydraulic drift of ripper lift is large....................................................1045 H-20 Ripper pin puller cylinder does not operate................................................1046 H-21 Abnormal sound comes out from around work equipment pump...................................1047 H-22 Fan speed is abnormal (Sound and/or vibration are abnormally large or engine overheats)....1048 Troubleshooting of engine (S-mode)..................................................................1051 Method of using troubleshooting chart...........................................................1053 S-1 Starting performance of engine is poor.....................................................1056 S-2 Engine does not start......................................................................1057 S-3 Engine does not pick up smoothly...........................................................1060 S-4 Engine stops during operation..............................................................1061 S-5 Engine does not rotate smoothly............................................................1062 S-6 Engine lack output (or lacks power)........................................................1063 S-7 Exhaust gas is black (incomplete combustion)...............................................1064 S-8 Oil consumption is excessive (or exhaust gas is blue)......................................1065 S-9 Oil becomes dirty quickly..................................................................1066 S-10 Fuel consumption is excessive.............................................................1067 S-11 Oil is in coolant (or coolant spurts back or coolant level goes down).....................1068 S-12 Oil pressure drops........................................................................1069 S-13 Oil level rises (Entry of coolant or fuel)................................................1070 S-14 Coolant temperature becomes too high (Overheating)........................................1071 S-15 Abnormal noise is made....................................................................1072 S-16 Vibration is excessive....................................................................1073 S-17 Air cannot be bled from fuel circuit......................................................1074 50 Disassembly and assembly.............................................................................1077 General information on disassembly and assembly.....................................................1077 How to read this manual.........................................................................1078 Coating materials list..........................................................................1080 Special tool list...............................................................................1083 Sketches of special tools.......................................................................1091 Engine and cooling system...........................................................................1103 Removal and installation of fuel supply pump assembly...........................................1104 Removal and installation of fuel injector assembly..............................................1113 Removal and installation of cylinder head assembly..............................................1122 Removal and installation of radiator assembly...................................................1140 Removal and installation of aftercooler assembly................................................1146 Removal and installation of engine assembly.....................................................1153 Removal and installation of engine hood assembly................................................1162 Removal and installation of engine front seal...................................................1166 Removal and installation of engine rear seal....................................................1170 Removal and installation of fuel tank assembly..................................................1176 Removal and installation of cooling fan drive assembly..........................................1181 Removal and installation of fan motor assembly..................................................1185 Power train, Part 1.................................................................................1189 Removal and installation of damper assembly.....................................................1190 Disassembly and assembly of damper assembly.....................................................1195 Removal and installation of power train unit assembly...........................................1201 Disconnection and connection of power train unit assembly.......................................1213 Power train, Part 2.................................................................................1221 Disassembly and assembly of PTO assembly........................................................1222 Disassembly and assembly of torque converter assembly...........................................1231 Disassembly and assembly of transmission assembly...............................................1237 Disassembly and assembly of steering case assembly..............................................1256 Power train, Part 3.................................................................................1275 Removal and installation of final drive assembly................................................1276 Disassembly and assembly of final drive assembly................................................1283 Undercarriage and frame.............................................................................1301 Removal and installation of track frame assembly................................................1303 Removal and installation of idler assembly......................................................1310 Disassembly and assembly of idler assembly......................................................1318 Removal and installation of recoil spring assembly..............................................1322 Disassembly and assembly of recoil spring assembly..............................................1325 Removal and installation of track roller assembly...............................................1330 Disassembly and assembly of track roller assembly...............................................1337 Removal and installation of 1st bogie assembly..................................................1339 Removal and installation of 2nd, 3rd, and 4th bogie assemblies..................................1349 Disassembly and assembly of bogie assembly......................................................1358 Removal and installation of carrier roller assembly.............................................1361 Disassembly and assembly of carrier roller assembly.............................................1364 Removal and installation of pivot shaft assembly................................................1369 Separation and connection of track shoe assembly................................................1372 General disassembly and assembly of track shoe..................................................1377 Disassembly and assembly of 1 link in field.....................................................1390 Disassembly and assembly of master link.........................................................1395 Removal and installation of equalizer bar assembly..............................................1399 Disassembly and assembly of equalizer bar assembly..............................................1404 Removal and installation of segment teeth.......................................................1406 Hydraulic system....................................................................................1411 Removal and installation of hydraulic tank assembly.............................................1412 Removal and installation of hydraulic pump assembly.............................................1418 Disassembly and assembly of hydraulic cylinder assembly.........................................1429 Work equipment......................................................................................1441 Removal and installation of blade assembly......................................................1442 Disassembly and assembly of multi-shank ripper..................................................1446 Cab and its attachments.............................................................................1451 Removal and installation of operator's cab assembly.............................................1452 Removal and installation of operator's cab glass (adhered window glass).........................1457 Removal and installation of operator's cab and floor frame assembly.............................1467 Electrical system...................................................................................1479 Removal and installation of air conditioner unit assembly.......................................1480 Removal and installation of engine controller assembly..........................................1487 Removal and installation of power train controller..............................................1490 Removal and installation of KOMTRAX assembly....................................................1493 60 Air conditioner......................................................................................1497 Structure, function, testing, adjusting, and troubleshooting........................................1497 Structure and function..........................................................................1499 Air conditioner component...................................................................1499 Configuration and function of refrigerating cycle...........................................1500 Outline of refrigerating cycle..............................................................1501 Air conditioner unit........................................................................1503 Functions of major components in the air conditioner unit...................................1505 Control plate...............................................................................1507 Compressor..................................................................................1509 Condenser...................................................................................1510 Receiver drier..............................................................................1511 Testing, adjusting and troubleshooting..........................................................1513 Caution about refrigerant...................................................................1513 Troubleshooting procedure...................................................................1514 Basic flow of troubleshooting...........................................................1514 Block diagram...............................................................................1515 Circuit diagram and arrangement of connector pins...........................................1516 Detail of air conditioner unit..............................................................1518 Part and connector locations................................................................1520 Testing air leakage (duct)..................................................................1527 Testing with self-diagnosis function........................................................1529 Testing temperature control.................................................................1532 Testing vent (mode) changeover..............................................................1535 Testing Recirc/Fresh changeover.............................................................1538 Testing inner sensor........................................................................1540 Testing evaporator temperature sensor.......................................................1541 Testing sunlight sensor.....................................................................1544 Testing (dual) pressure switch for refrigerant..............................................1545 Testing relays and diodes...................................................................1547 Troubleshooting chart 1.....................................................................1549 Troubleshooting chart 2.....................................................................1550 Troubleshooting for electrical system (E mode)..............................................1553 E-1 Power supply system (Air conditioner does not operate)..............................1554 E-2 Compressor system (Air is not cooled)...............................................1558 E-3 Blower motor system (No air comes out or air flow is abnormal)......................1562 E-4 Temperature cannot be controlled....................................................1568 E-5 Vent (mode) cannot be changed over..................................................1571 E-6 Recirc/Fresh air cannot be changed over.............................................1574 Troubleshooting with gauge pressure.........................................................1577 Connection of service tool..................................................................1579 Precautions for connecting air conditioner piping...........................................1580 Handling of compressor oil..................................................................1581 1. Control of compressor oil............................................................1581 2. Adding of compressor oil.............................................................1581 3. Compressor replacement...............................................................1582 4. Applying compressor oil for O-ring...................................................1582 90 Diagrams and drawings................................................................................1585 Hydraulic diagrams and drawings.....................................................................1585 Power train hydraulic circuit diagram...........................................................1587 Hydraulic circuit diagram Serial No.: 85001 - 85024.............................................1589 Hydraulic circuit diagram Serial No.: 85025 and up..............................................1591 Electrical diagrams and drawings....................................................................1595 Electrical circuit diagram......................................................................1597 Electrical circuit diagram for inside cab.......................................................1625 Connector/electrical wiring connection table....................................................1627 Wiring harness diagram..........................................................................1693
DESCRIPTION:
KOMATSU D155A-6 BULLDOZER SHOP MANUAL SEN02854-16 – PDF DOWNLOAD
Composition of shop manual
The contents of this shop manual are shown together with Form No. in a list.
Note 1: Always keep the latest version of this manual in accordance with this list and utilize accordingly. The marks shown to the right of Form No. denote the following: Q: New issue (to be filed additionally) q: Revision (to be replaced for each Form No.)
Note 2: This shop manual can be supplied for each Form No.
Note 3: To file this shop manual in the special binder for management, handle it as follows:
• Place a divider on the top of each section in the file after matching the Tub No. with No. indicated next to each Section Name shown in the table below:
• File overview and other materials in sections in the order shown below and utilize them accordingly.
S.S 25/12/24
