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Komatsu WA320-6 Wheel Loader Shop Manual CEBM022801 – PDF DOWNLOAD
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Komatsu WA320-6 Wheel Loader Shop Manual
SERIAL NUMBER : WA320-6 A35001 and up
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Description
Komatsu WA320-6 Wheel Loader Shop Manual
FILE DETAILS:
Komatsu WA320-6 Wheel Loader Shop Manual
Brands: Komatsu
Equipment Type: Wheel Loader
Manuals Type: Shop Manual
Machine Model: WA320-6
Serial Number: A35001 and up
Book Code: CEBM022801
Language: English
Pages: 1396
File Format: Portable Document Format (PDF)
DESCRIPTION:
Komatsu WA320-6 Wheel Loader Shop Manual
1 GENERAL:
This shop manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to full effect at every opportunity. This shop manual mainly contains the necessary technical information for operations performed in a service workshop. For ease of understanding, the manual is divided into the following sections. These sections are further divided into each main group of components.
GENERAL:
This section lists the general machine dimensions, performance specifications, component weights, and fuel, coolant and lubricant specification charts.
STRUCTURE AND FUNCTION:
This section explains the structure and function of each component. It serves not only to give an understanding of the structure, but also serves as reference material for troubleshooting.
STANDARD VALUE TABLE:
This section explains the standard values for new machine and judgement criteria for testing, adjusting and troubleshooting. This standard value table is used to check the standard values in testing and adjusting and to judge parts in troubleshooting.
TESTING AND ADJUSTING:
This section explains checks to be made before and after performing repairs, as well as adjustments to be made at completion of the checks and repairs.
TROUBLESHOOTING:
This section explains how to find out failed parts and how to repair them. The troubleshooting is divided by failure modes. The “S mode” of the troubleshooting related to the engine may be also explained in the
DISASSEMBLY AND ASSEMBLY
This section explains the order to be followed when removing, installing, disassembling or assembling each component, as well as precautions to be taken for these operations.
MAINTENANCE STANDARD
This section gives the judgement standards when inspecting disassembled parts.
AIR CONDITIONING
This section explains the air conditioning system, structure and function, troubleshooting, disassembly, and assembly.
DIAGRAMS AND DRAWINGS
This section has the foldout drawings for the machine.
TABLE OF CONTENTS:
Komatsu WA320-6 Wheel Loader Shop Manual
CEBM022801 - WA320-6 snA35001 and up.......................................................... 1 CONTENTS.................................................................................. 2 REVISED PAGES............................................................................. 3 SAFETY.................................................................................... 15 Safety Notice......................................................................... 15 IMPORTANT SAFETY NOTICE........................................................... 15 General Precautions............................................................... 15 Preparations for Work............................................................. 16 Precautions During Work........................................................... 16 Seat Belt Inspection.................................................................. 17 GENERAL................................................................................... 18 HOW TO READ THE SHOP MANUAL............................................................... 19 Volumes............................................................................... 19 Distribution and Updating............................................................. 19 Filing Method......................................................................... 19 Revised Edition Mark.................................................................. 19 Revisions............................................................................. 19 Symbols............................................................................... 19 HOISTING INSTRUCTIONS..................................................................... 20 Hoisting.............................................................................. 20 Making Signs/Hand Signals............................................................. 20 Precautions........................................................................... 20 Precautions for Sling Work........................................................ 20 Precautions for Using Mobile Crane................................................ 21 Precautions for Using Overhead Hoist Crane........................................ 21 Selecting Wire Ropes.................................................................. 22 AIR CONDITIONER CIRCUITS.................................................................. 23 Precautions for Handling Hoses and Tubes.............................................. 23 Disconnecting Hoses and Tubes..................................................... 23 Connecting Hoses and Tubes........................................................ 23 MAINTENANCE STANDARD TERMS................................................................ 24 HANDLING ELECTRIC AND HYDRAULIC EQUIPMENT................................................. 26 Handling Electric Equipment........................................................... 26 Handling Wiring Harnesses and Connectors.......................................... 26 Main Failures Occurring in Wiring Harness......................................... 26 Removing, Installing, and Drying Connectors and Wiring Harnesses.................. 27 Handling Controller............................................................... 31 Troubleshooting Electric Circuits................................................. 31 Handling Hydraulic Equipment.......................................................... 32 Handling Connectors Used for Engines.................................................. 33 Slide Lock Type................................................................... 33 Pull Lock Type.................................................................... 34 Push Lock Type.................................................................... 34 Turn-housing Type (Round Green Connector)......................................... 36 PRECAUTIONS FOR OPERATIONS................................................................ 37 Precautions when Carrying Out Removal Work............................................ 37 Precautions when Carrying Out Installation Work....................................... 38 Precautions when Completing the Operation............................................. 39 PUSH-PULL COUPLER......................................................................... 40 Type 1................................................................................ 40 Disconnection..................................................................... 40 Connection........................................................................ 40 Type 2................................................................................ 41 Disconnection..................................................................... 41 Connection........................................................................ 41 Type 3................................................................................ 42 Disconnection..................................................................... 42 Connection........................................................................ 42 COATING MATERIALS......................................................................... 43 STANDARD TIGHTENING TORQUE................................................................ 45 Standard Tightening Tables............................................................ 45 For Bolts and Nuts................................................................ 45 For Split Flange Bolts............................................................ 46 For O-Ring Boss Piping Joints..................................................... 46 For O-Ring Boss Plugs............................................................. 47 For Hoses (Taper-Seal Type and Face-Seal Type).................................... 47 For Face Seal Joints.............................................................. 48 For 102, 107, and 114 Engine Series (Bolts and Nuts).............................. 48 For 102, 107, and 114 Engine Series (Eye Joints).................................. 49 For 102, 107, and 114 Engine Series (Taper Screws)................................ 49 CONVERSION TABLES......................................................................... 50 Method of Using the Conversion Table.................................................. 50 01 GENERAL.................................................................................... 57 SPECIFICATIONS............................................................................ 58 Dimension Drawing..................................................................... 58 Specification Tables.................................................................. 60 WEIGHT TABLE.............................................................................. 66 FUEL, COOLANT, AND LUBRICANTS............................................................. 68 10 STRUCTURE, FUNCTION ANDMAINTENANCE STANDARD................................................ 71 ENGINE AND COOLING SYSTEM................................................................. 75 Engine and Transfer Mount............................................................. 75 Damper................................................................................ 76 Cooling System........................................................................ 78 Cooling System Hydraulic Piping Diagram............................................... 79 Cooling Fan Motor..................................................................... 80 Hydraulic Motor................................................................... 84 Suction Safety Valve.............................................................. 85 Reversible Valve.................................................................. 87 Flow Control Valve (continuously-variable type)................................... 88 POWER TRAIN SYSTEM........................................................................ 89 Drive Line Components................................................................. 89 Power Train System Diagram............................................................ 90 Drive Shaft........................................................................... 92 HST Hydraulic Piping Diagram.......................................................... 93 HST Pump.............................................................................. 94 Operation......................................................................... 96 High-Pressure Relief Valve........................................................ 97 Low-pressure Relief Valve......................................................... 99 HST Charge Pump................................................................... 100 Speed-Related Valve (DA Valve).................................................... 102 High-Pressure Cutoff Valve........................................................ 103 HST Motor............................................................................. 104 HST Motor 1....................................................................... 104 HST Motor 2....................................................................... 106 EP Servo Valve.................................................................... 108 HA Servo Valve.................................................................... 109 Directional Shuttle Valve......................................................... 110 Transfer.............................................................................. 112 Input Shaft....................................................................... 116 Output Shaft...................................................................... 120 Outline........................................................................... 124 Operation of Clutch............................................................... 125 Power Transmitting Route.......................................................... 126 Clutch Solenoid Valve............................................................. 128 DRIVE AXLE SYSTEM......................................................................... 130 Front and Rear Axles.................................................................. 130 Front Axle........................................................................ 130 Rear Axle......................................................................... 132 Differential.......................................................................... 134 Front Differential................................................................ 134 Rear Differential................................................................. 138 Torque Proportioning Differential................................................. 142 Limited Slip Differential (if equipped)........................................... 144 Final Drive........................................................................... 148 Front Final Drive................................................................. 148 Rear Final Drive.................................................................. 150 STEERING SYSTEM........................................................................... 153 Steering Piping Diagram............................................................... 153 Steering Column....................................................................... 154 Priority Valve........................................................................ 155 Orbitrol Valve........................................................................ 159 Operation......................................................................... 162 Connection of Hand Pump and Sleeve................................................ 166 Cushion Valve......................................................................... 168 Steering Cylinder..................................................................... 170 Emergency Steering Piping Diagram (if equipped)....................................... 172 Emergency Steering Valve (if equipped)................................................ 174 Steering Relief Valve (if equipped)................................................... 178 BRAKE SYSTEM.............................................................................. 180 Brake Piping Diagram.................................................................. 180 Charge Valve.......................................................................... 182 Brake Valve........................................................................... 186 Braking Operation..................................................................... 188 Inching Valve......................................................................... 191 Accumulator (for Brake)............................................................... 192 Slack Adjuster........................................................................ 194 Brakes................................................................................ 196 Front Brake....................................................................... 196 Rear Brake........................................................................ 198 Parking Brake System.................................................................. 201 Brake Control..................................................................... 201 Parking Brake..................................................................... 202 UNDERCARRIAGE AND FRAME................................................................... 204 Axle Mounting and Center Hinge Pin.................................................... 204 Tires................................................................................. 209 Radial Tire....................................................................... 209 Bias Tire......................................................................... 210 HYDRAULIC SYSTEM.......................................................................... 212 Work Equipment Hydraulic Piping Diagram............................................... 212 Work Equipment Control Lever Linkage.................................................. 214 Multi-Function Mono-Lever Type.................................................... 214 2-Lever Type (if equipped)........................................................ 215 Hydraulic Tank........................................................................ 216 Breather.......................................................................... 217 4-Gear Pump........................................................................... 218 Work Equipment Control Valve.......................................................... 220 2-Spool Type...................................................................... 220 3-Spool Type...................................................................... 224 Relief Valve...................................................................... 228 Safety-Suction Valve.............................................................. 229 Suction Valve..................................................................... 230 Operation of Work Equipment Control Valve......................................... 231 Cutoff Valve.......................................................................... 238 PPC Valve............................................................................. 241 Work Equipment PPC Valve: Mono Lever Type......................................... 241 Work Equipment PPC Valve: 2-Lever Type (if equipped).............................. 247 Attachment PPC Valve.............................................................. 254 Lock Valve (for PPC Circuit).......................................................... 256 Accumulator (for PPC Circuit)......................................................... 257 ECSS Valve............................................................................ 258 Accumulator (for ECSS)................................................................ 261 Work Equipment............................................................................ 262 Work Equipment Linkage................................................................ 262 Bucket................................................................................ 264 Bucket Positioner and Boom Kickout.................................................... 266 Operation of Proximity Switch..................................................... 268 Work Equipment Cylinders.............................................................. 274 Lift Cylinder..................................................................... 274 Bucket Cylinder................................................................... 274 CAB ENVIRONMENT........................................................................... 275 Cab................................................................................... 275 Air Conditioner....................................................................... 276 Air Conditioner Piping Diagram.................................................... 276 Refrigerant Circuit Diagram....................................................... 278 Air Conditioner Unit.............................................................. 279 Blower and Intake Unit............................................................ 282 Compressor........................................................................ 284 Condenser......................................................................... 285 Receiver.......................................................................... 286 Air Conditioner Panel............................................................. 288 ELECTRICAL SYSTEM......................................................................... 292 Machine Monitor System................................................................ 292 System Circuit Diagram............................................................ 294 Machine Monitor................................................................... 296 Items Displayed on Monitor........................................................ 297 Machine Monitor Operation Switches.................................................... 306 Setting Machine Monitor........................................................... 307 Troubleshooting Function.......................................................... 308 Character Display Function........................................................ 308 Operator Mode Functions........................................................... 309 Service Mode Functions............................................................ 312 Input and Output Signals.......................................................... 317 Electrical System (HST Controller System)............................................. 325 Input and Output Signals Diagram.................................................. 325 HST Controller Gearshifting Control Function...................................... 326 HST Controller Protection Function................................................ 332 Cooling Fan Control Function...................................................... 335 System Circuit Diagram............................................................ 340 HST Controller........................................................................ 343 ECSS System........................................................................... 345 ELECTRONIC TRANSMISSION CONTROL........................................................... 347 KOMTRAX Terminal System............................................................... 347 KOMTRAX Terminal.................................................................. 349 Engine Starting Circuit............................................................... 351 Engine Stopping Circuit............................................................... 353 Preheating Circuit.................................................................... 354 Engine Output Lowering Function....................................................... 355 Automatic Warm-up Function............................................................ 355 Parking Brake Circuit................................................................. 356 Max. Traction Switch (if equipped).................................................... 358 Multi-Function Knob................................................................... 359 Modification of Multi-Function Lever.............................................. 360 Sensors............................................................................... 363 Speed Sensor...................................................................... 363 HST Oil Temperature Sensor........................................................ 365 Brake Oil Temperature Sensor...................................................... 365 HST Oil Pressure Sensor........................................................... 366 HST Oil Filter Clogging Sensor.................................................... 366 Coolant Level Sensor.............................................................. 367 Fuel Level Sensor................................................................. 368 Accelerator Pedal Sensor.......................................................... 369 Air Cleaner Clogging Sensor....................................................... 371 Water-in-Fuel Sensor.............................................................. 372 Boom Kick-Out Proximity Switch.................................................... 373 Bucket Positioner Proximity Switch................................................ 373 20 STANDARD VALUE TABLES...................................................................... 375 STANDARD VALUE TABLES..................................................................... 377 Standard Value Table for Engine....................................................... 377 Standard Value Table for Chassis...................................................... 378 MACHINE POSTURE........................................................................... 383 30 TESTING AND ADJUSTING...................................................................... 385 TOOLS..................................................................................... 389 Tools for Testing, Adjusting, and Troubleshooting..................................... 389 ENGINE COMPONENTS......................................................................... 395 Engine Speed.......................................................................... 395 Measure Engine Speed (Low and High Idle).......................................... 395 Measure HST Stall Speed........................................................... 395 Measure Hydraulic Stall Speed..................................................... 396 Measure HST Stall and Hydraulic Stall (Full Stall) Speed.......................... 396 Exhaust Gas Color..................................................................... 397 Using Handy Smoke Checker A1...................................................... 397 Using Smoke Meter A2.............................................................. 397 Adjusting Valve Clearance............................................................. 399 Measuring Engine Compression.......................................................... 401 Measuring Blow-by Pressure............................................................ 404 Measuring Engine Oil Pressure......................................................... 406 Intake Air (Boost) Pressure........................................................... 407 Measuring with Monitoring Function................................................ 407 Measuring with Measuring Tool..................................................... 408 FUEL SYSTEM............................................................................... 409 Handling Fuel System Equipment........................................................ 409 Releasing Residual Pressure in Fuel System............................................ 409 Measuring Fuel Pressure............................................................... 410 Measuring Pressure in Fuel Low-pressure Circuit................................... 410 Measuring Pressure in Fuel Return Circuit......................................... 411 Measuring Fuel Negative-Pressure Circuit Pressure................................. 412 Fuel Delivery, Return, and Leak Rate.................................................. 413 Measuring Supply Pump Delivery.................................................... 413 Measuring Return Rate from Supply Pump............................................ 415 Measuring Leakage from Pressure Limiter........................................... 416 Measuring Return Rate from Injector............................................... 417 Bleeding Air from Fuel Circuit........................................................ 418 Testing Leakage in Fuel System........................................................ 419 Handling Reduced Cylinder Mode Operation.............................................. 420 Handling No-Injection Cranking Operation.............................................. 420 Handling Controller Voltage Circuit................................................... 420 EXHAUST SYSTEM AND PIPING................................................................. 421 Checking Muffler and Muffler Stack for Looseness and Damage........................... 421 Checking Muffler Function............................................................. 421 Checking Installed Condition of Cylinder Head and Manifolds........................... 421 Checking Engine Piping for Damage and Looseness....................................... 421 BELTS..................................................................................... 422 Air Conditioner Compressor Belt....................................................... 422 Testing the Tension............................................................... 422 Adjusting the Tension............................................................. 422 Replacing Alternator Belt............................................................. 423 ACCELERATOR PEDAL......................................................................... 424 Testing Operating Effort.............................................................. 424 Testing Operating Angle............................................................... 425 DIRECTIONAL LEVER......................................................................... 426 Checking Operating Effort............................................................. 426 Checking Travel....................................................................... 426 POWER TRAIN OIL PRESSURES................................................................. 427 HST Oil Pressure...................................................................... 427 Testing High-Pressure Cutoff Oil Pressure......................................... 427 Testing Low-Pressure Relief Pressure.............................................. 428 Testing Servo Piston Control Pressure (DA Pressure)............................... 429 Testing Servo Piston Actuating Pressure........................................... 430 Adjusting High-Pressure Cutoff Valve.............................................. 430 Adjusting Low-Pressure Relief Valve............................................... 431 Adjusting DA Pressure............................................................. 432 Testing Clutch Control Pressure....................................................... 433 STEERING SYSTEM........................................................................... 435 Steering Wheel........................................................................ 435 Measuring Play.................................................................... 435 Measuring Operating Effort........................................................ 436 Measuring Operating Time.......................................................... 436 Steering Oil Pressure................................................................. 437 Measuring Main Relief Pressure.................................................... 437 Adjusting Main Relief Pressure.................................................... 439 Bleeding Air from Steering Circuit.................................................... 440 HYDRAULIC DRIVE FAN....................................................................... 441 Measuring Fan Speed................................................................... 441 Measuring Fan Drive Oil Pressure...................................................... 442 WHEEL BRAKE SYSTEM........................................................................ 443 Measuring Pressing Angle of Brake Pedal............................................... 443 Brake Pedal Linkage................................................................... 444 Testing........................................................................... 444 Adjusting......................................................................... 444 Measuring Brake Performance........................................................... 445 Accumulator Charge.................................................................... 446 Measuring......................................................................... 446 Adjusting......................................................................... 447 Measuring Brake Oil Pressure.......................................................... 448 Testing Wear of Wheel Brake Disc...................................................... 451 Bleeding Air from Brake Circuit....................................................... 452 Releasing Residual Pressure in Brake Accumulator Circuit.............................. 453 PARKING BRAKE SYSTEM...................................................................... 454 Testing Parking Brake Performance..................................................... 454 Parking Brake Control Cable........................................................... 455 Testing........................................................................... 455 Adjusting......................................................................... 455 WORK EQUIPMENT SYSTEM..................................................................... 456 Work Equipment Control Lever.......................................................... 456 Measuring Operating Effort........................................................ 456 Measuring Travel.................................................................. 456 Work Equipment Hydraulic Pressure..................................................... 457 Measuring......................................................................... 457 Adjusting......................................................................... 457 PPC Oil Pressure...................................................................... 459 Measuring PPC Valve Basic Pressure................................................ 459 Measuring PPC Valve Output Pressure............................................... 460 Bleeding Air from Hydraulic Circuit................................................... 461 Bleeding Air from Work Equipment PPC Circuit...................................... 461 Bleeding Air from Cylinders....................................................... 461 Releasing Residual Pressure in Hydraulic Circuit...................................... 462 Between Each Hydraulic Cylinder and Control Valve................................. 462 In Brake Accumulator Circuit...................................................... 462 In PPC Accumulator Circuit........................................................ 462 Work Equipment Positioners............................................................ 463 Bucket Positioner................................................................. 463 Boom Kickout Switch............................................................... 464 Proximity Switch Operation Pilot Lamp................................................. 465 ELECTRICAL SYSTEM TROUBLESHOOTING......................................................... 466 Procedure for Testing Diodes.......................................................... 466 When Using Digital Type Circuit Tester............................................ 466 When Using Analog Type Circuit Tester............................................. 467 Preparation for Troubleshooting Electric System....................................... 468 Machine Monitor................................................................... 468 HST Controller.................................................................... 469 KOMTRAX Terminal.................................................................. 470 Sensors............................................................................... 471 Boost Pressure and Temperature Sensor (BOOST PRESS & IMT)......................... 471 Supply Pump IMV Solenoid (FUEL REGULATOR)......................................... 471 Common Rail Pressure Sensor (FUEL RAIL PRESS)..................................... 472 Engine Coolant Temperature Sensor (COOLANT TEMP).................................. 472 KOMTRAX TERMINAL SYSTEM................................................................... 473 Terminal Installed at Plant Before Shipment........................................... 473 Terminal Retrofitted Machine After Shipment........................................... 473 Starting Operation.................................................................... 473 Application for the Start of Use.................................................. 476 Komtrax Terminal Lamps................................................................ 477 Contents of 7-Segment and Dot Displays for CPU.................................... 479 MACHINE MONITOR SYSTEM.................................................................... 480 Adjusting Machine Monitor............................................................. 480 Adjusting for Replaced, Reassembled, or Added Sensor/Controller....................... 481 Adjustment for User’s Needs........................................................... 482 Special Functions of Machine Monitor (EMMS)........................................... 483 Normal and Special Functions of Machine Monitor................................... 484 Functions and Flow of Service Mode.................................................... 485 Operator Mode......................................................................... 488 Service Meter Display Function (1)................................................ 488 Traction Level Selection Function (2)............................................. 488 HST Function Selection Function (3)............................................... 488 Odometer Display Function (4)..................................................... 489 Maintenance Monitoring Function (5)............................................... 489 Telephone Number Input Function (6)............................................... 489 Language Selection Function (7)................................................... 489 Monitor Brightness Adjustment Function (8)........................................ 490 Travel Speed/Engine Speed Display Selecting Function (9).......................... 490 Travel Speed/Engine Speed Display/Non-Display Selecting Function (10)............. 491 Action Code Display Function (11)................................................. 491 Failure Code Display Function (12)................................................ 492 Service Mode.......................................................................... 493 Switching to Service Mode and Screen Display (1).................................. 493 Electrical System Fault History Display Function (ELECTRIC FAULT) (2)............. 495 Mechanical System Fault History Display Function (MACHINE FAULT) (3).............. 497 Real-Time Monitoring Function (REAL-TIME MONITOR) (4)............................. 498 Real-Time Monitoring Code Tables.................................................. 501 Engine Reduced-Cylinder Function (CYLINDER CUT-OUT) (5)........................... 515 No-Injection Cranking Function (6)................................................ 516 Adjustment Function (TUNING) (7).................................................. 517 Maintenance Monitoring Function (8)............................................... 521 Operating Information Display Function (9)........................................ 527 Optional Device Selecting Function (10)........................................... 530 Machine Serial Number Input Function (11)......................................... 534 Model Select Function (MACHINE WA***) (12)........................................ 534 Initialize Function (13).......................................................... 535 Setting Procedure for Service Meter and Odometer.................................. 536 PM-CLINIC INSPECTION TABLE................................................................ 540 40 TROUBLESHOOTING............................................................................ 545 POINTS TO REMEMBER WHEN TROUBLESHOOTING................................................... 555 SEQUENCE OF EVENTS IN TROUBLESHOOTING..................................................... 557 PRECAUTIONS WHEN CARRYING OUT MAINTENANCE................................................. 558 Precautions when Handling Electrical Equipment........................................ 558 Handling Electronic Control Unit...................................................... 563 Points to Remember when Troubleshooting Electrical Circuits........................... 564 Handling Hydraulic Equipment.......................................................... 565 ELECTRIC WIRE CODE........................................................................ 567 How to Read Electric Wire Code........................................................ 567 Type, Symbol, and Material............................................................ 567 Dimensions............................................................................ 568 Color Codes Table..................................................................... 569 Types of Circuits and Color Codes..................................................... 570 Classification by Thickness........................................................... 570 Classification by Color and Code...................................................... 571 CHECKS BEFORE TROUBLESHOOTING............................................................. 572 Categories and Method of Using Troubleshooting Charts................................. 573 Troubleshooting Individual Electrical Circuits........................................ 574 Chart Use......................................................................... 576 Chart Tips........................................................................ 576 Troubleshooting Individual Hydraulic Circuits......................................... 577 CONNECTION TABLE FOR CONNECTOR PIN NUMBERS................................................ 579 X-Type Connectors..................................................................... 579 SWP-Type Connectors................................................................... 581 M-Type Connectors..................................................................... 583 S-Type Connectors..................................................................... 585 MIC-Type Connectors................................................................... 587 AMP040-Type Connectors................................................................ 589 AMP070-Type Connectors................................................................ 591 Miscellaneous Types of Connectors..................................................... 593 HD30 Series Connectors................................................................ 597 DT Series Connectors.................................................................. 602 DTM Series Connectors................................................................. 604 DTHD Series Connectors................................................................ 604 DTP Series Connectors................................................................. 605 DRC26 Series Connectors............................................................... 606 DRC12, 16 Connectors.................................................................. 608 AMP Connectors for Pump Controller (CH700)............................................ 609 BOSCH Connectors for Engine........................................................... 611 SUMITOMO Connectors for Engine........................................................ 612 CANNON Connectors for Engine.......................................................... 613 AMP Connectors for Engine............................................................. 614 FRAMATOME Connectors for Engine....................................................... 615 PACKARD Connectors for Engine......................................................... 617 OT Series Connectors for Engine....................................................... 618 T-BRANCH BOX and T-BRANCH ADAPTER TABLE................................................... 619 MODE CHART................................................................................ 624 INFORMATION CONTAINED IN TESTING PROCEDURES............................................... 627 TROUBLESHOOTING BY FAILURE CODE........................................................... 629 Failure Code Table.................................................................... 629 FUSE BOX AND SLOW-BLOW FUSES.............................................................. 635 Connection Table of Fuse Box and Slow-Blow Fuses...................................... 635 Fuse Box: FS1..................................................................... 635 Fuse Box: FS2..................................................................... 636 Slow-Blow Fuses................................................................... 637 FAILURE CODES............................................................................. 638 2G40ZG................................................................................ 640 Brake: Oil Pressure Reduction..................................................... 640 6091NX................................................................................ 642 HST Filter: Clogging.............................................................. 642 989FN1................................................................................ 643 Travel Speed: Overrun Alarm....................................................... 643 AA1ANX................................................................................ 644 Air Cleaner: Clogging............................................................. 644 AB00L6................................................................................ 646 Alternator R System: Hot Short.................................................... 646 AB00MA................................................................................ 648 Alternator R System: Ground Fault/Disconnection/Low Charge Voltage................ 648 B@BAZG................................................................................ 650 Engine: Oil Pressure Reduction.................................................... 650 B@BAZK................................................................................ 651 Engine Oil: Low Level............................................................. 651 B@BCNS................................................................................ 652 Engine: Overheat.................................................................. 652 B@BCZK................................................................................ 654 Engine: Low Coolant Level......................................................... 654 B@C6NS................................................................................ 656 Front Brake: High Oil Temperature................................................. 656 B@CRNS................................................................................ 657 HST: High Oil Temperature......................................................... 657 CA111................................................................................. 658 Abnormality in Engine Controller.................................................. 658 CA115................................................................................. 659 Engine Ne or Bkup Speed Sensor Error.............................................. 659 CA122................................................................................. 660 Charge Pressure Sensor High Error................................................. 660 CA123................................................................................. 662 Charge Pressure Sensor Low Error.................................................. 662 CA131................................................................................. 664 Throttle Sensor High Error........................................................ 664 CA132................................................................................. 666 Throttle Sensor Low Error......................................................... 666 CA144................................................................................. 668 Coolant Sensor High Error......................................................... 668 CA145................................................................................. 670 Coolant Sensor Low Error.......................................................... 670 CA153................................................................................. 672 Charge Temperature Sensor High Error.............................................. 672 CA154................................................................................. 674 Charge Temperature Sensor Low Error............................................... 674 CA155................................................................................. 676 Lowering of Speed by Abnormally High Charge Temperature........................... 676 CA187................................................................................. 678 Sensor Power Supply 2 Low Error................................................... 678 CA221................................................................................. 680 Atmospheric Pressure Sensor High Error............................................ 680 CA222................................................................................. 682 Atmospheric Sensor Low Error...................................................... 682 CA227................................................................................. 684 Sensor Power Supply 2 High Error.................................................. 684 CA234................................................................................. 686 Engine Overspeed.................................................................. 686 CA238................................................................................. 687 Ne Speed Sensor Power Supply Error................................................ 687 CA271................................................................................. 688 IMV (IMA) Short Circuit........................................................... 688 CA272................................................................................. 690 IMV (IMA) Disconnection........................................................... 690 CA322................................................................................. 692 Injector #1 Open/Short Error...................................................... 692 CA323................................................................................. 694 Injector #5 Open/Short Error...................................................... 694 CA324................................................................................. 696 Injector #3 Open/Short Error...................................................... 696 CA325................................................................................. 698 Injector #6 Open/Short Error...................................................... 698 CA331................................................................................. 700 Injector #2 Open/Short Error...................................................... 700 CA332................................................................................. 702 Injector #4 Open/Short Error...................................................... 702 CA342................................................................................. 704 Calibration Code Inconsistency.................................................... 704 CA351................................................................................. 706 Injectors Drive Circuit Error..................................................... 706 CA352................................................................................. 708 Sensor Power Supply 1 Low Error................................................... 708 CA386................................................................................. 710 Sensor Power Supply 1 High Error.................................................. 710 CA428................................................................................. 712 Abnormally High Level in Water Sensor............................................. 712 CA429................................................................................. 714 Abnormally Low Level in Water Sensor.............................................. 714 CA431................................................................................. 716 Idle Validation Switch Error...................................................... 716 CA432................................................................................. 720 Idle Validation Action Error...................................................... 720 CA435................................................................................. 724 Engine Oil Pressure Switch Error.................................................. 724 CA441................................................................................. 726 Battery Voltage Low Error......................................................... 726 CA442................................................................................. 730 Battery Voltage High Error........................................................ 730 CA449................................................................................. 732 Common Rail Pressure High Error 2................................................. 732 CA451................................................................................. 734 Common Rail Pressure Sensor High Error............................................ 734 CA452................................................................................. 736 Common Rail Pressure Sensor Low Error............................................. 736 CA488................................................................................. 738 Lowering of Torque by Abnormally High Charge Temperature.......................... 738 CA553................................................................................. 739 Common Rail Pressure High Error 1................................................. 739 CA559................................................................................. 740 Supply Pump Pressure Very Low Error............................................... 740 CA689................................................................................. 742 Engine Ne Speed Sensor Error...................................................... 742 CA731................................................................................. 744 Engine Bkup Speed Sensor Phase Error.............................................. 744 CA757................................................................................. 745 All Continuous Data Lost Error.................................................... 745 CA778................................................................................. 748 Engine Bkup Speed Sensor Error.................................................... 748 CA1633................................................................................ 750 KOMNET Datalink Timeout Error..................................................... 750 CA2185................................................................................ 754 Throttle Sensor Supply Voltage High Error......................................... 754 CA2186................................................................................ 756 Throttle Sensor Power Supply Low Error............................................ 756 CA2249................................................................................ 758 Supply Pump Pressure Very Low Error 2............................................. 758 CA2311................................................................................ 760 Abnormality in IMV (IMA) Solenoid................................................. 760 CA2555................................................................................ 762 Intake Heater Relay Disconnection Error........................................... 762 CA2556................................................................................ 764 Intake Heater Relay Short Circuit Error........................................... 764 D160KY................................................................................ 766 Backup Alarm/Lamp Relay 1 Circuit: Hot Short...................................... 766 D192KY................................................................................ 768 ECSS Solenoid Relay: Hot Short.................................................... 768 D1B0KA................................................................................ 770 HST Safety Relay: Disconnection................................................... 770 D1B0KB................................................................................ 772 HST Safety Relay: Ground Fault.................................................... 772 D1B0KY................................................................................ 774 HST Safety Relay: Hot Short....................................................... 774 D5ZHL6................................................................................ 776 IGN C System: Ground Fault/Disconnection.......................................... 776 DAF3KK................................................................................ 778 UNSW Power Supply: Ground Fault/Disconnection..................................... 778 DAFRKR................................................................................ 780 Machine Monitor CAN-NET Signal: Disconnection..................................... 780 DAJ0KK................................................................................ 782 HST Controller Power Supply: Low Voltage.......................................... 782 DAJ0KT................................................................................ 784 HST Controller Memory (EEPROM): Abnormality....................................... 784 DAJ1L4................................................................................ 786 HST Controller Main Power Line: Disconnection/Ground Fault........................ 786 DAJ1L6................................................................................ 788 HST Controller Main Power Line: Hot Short......................................... 788 DAJ2KK................................................................................ 790 Controller Solenoid Power Supply: Low Voltage..................................... 790 DAJ2L3................................................................................ 792 HST Controller Load Power Supply Holding Line: Hot Short in Wiring Harness........ 792 DAJ2L4................................................................................ 794 HST Controller Load Power Supply Holding Line: Disconnection/Ground Fault......... 794 DAJ5KX................................................................................ 796 Sensor 5V Power Supply: Out-of-Output Range....................................... 796 DAJ9KQ................................................................................ 798 HST Controller Model Selection: Disagreement of Model Selection Signals........... 798 DAJRKR................................................................................ 800 HST Controller CAN-NET Signal: Disconnection...................................... 800 DAJRMA................................................................................ 805 HST Controller: Disagreement in Option Selection.................................. 805 DB2RKR................................................................................ 806 Engine Controller CAN-NET: Disconnection in Signal Line........................... 806 DD1NL4................................................................................ 812 Fan Automatic Reverse Switch Signal: Abnormality.................................. 812 DD1NLD................................................................................ 814 Fan Reverse Switch Signal: Abnormality............................................ 814 DDB6KA................................................................................ 816 Parking Brake Reminder Signal: Disconnection/Short Circuit........................ 816 DDB6KB................................................................................ 818 Parking Brake Indicator Signal: Ground Fault...................................... 818 DDB6KZ................................................................................ 820 Parking Brake Switch or Parking Brake Reminder Switch: Trouble.................... 820 DDB6L0................................................................................ 822 Parking Brake Reminder Signal: Ground Fault....................................... 822 DDB6L4................................................................................ 824 Parking Brake Indicator Signal: Disconnection/Hot Short........................... 824 DDD7KX................................................................................ 826 Travel Speed Control Dial Signal: Disconnection/Ground Fault...................... 826 DDD7KY................................................................................ 828 Travel Speed Control Dial Signal: Hot Short....................................... 828 DDE5MA................................................................................ 830 Emergency Steering Operation Switch: Disconnection................................ 830 DDK3KA................................................................................ 832 Directional Selector Switch: Disconnection/Hot Short.............................. 832 DDK3KB................................................................................ 834 Directional Selector Switch: Ground Fault......................................... 834 DDK6KA................................................................................ 836 FNR Lever: Disconnection/Ground Fault............................................. 836 DDK6KY................................................................................ 840 FNR Lever: Hot Short.............................................................. 840 DDS5L6................................................................................ 842 Steering: Low Oil Pressure (Operation of Emergency Steering)...................... 842 DF10KA................................................................................ 844 Travel Speed Range Selector Switch: Disconnection/Ground Fault.................... 844 DF10KB................................................................................ 848 Travel Speed Range Selector Switch: Hot Short..................................... 848 DGH1KX................................................................................ 850 HST Oil Temperature Sensor: Ground Fault.......................................... 850 DGR2KB................................................................................ 852 Brake Oil Temperature Sensor: Ground Fault........................................ 852 DGR2KZ................................................................................ 854 Brake Oil Temperature Sensor: Disconnection/Hot Short............................. 854 DHH1KX................................................................................ 856 HST Oil Pressure Sensor: Disconnection/Ground Fault............................... 856 DHH1KY................................................................................ 858 HST Oil Pressure Sensor: Hot Short................................................ 858 DHTCL6................................................................................ 860 HST Filter Clogging Sensor: Functional Defect..................................... 860 DJF1KA................................................................................ 862 Fuel Level Sensor: Disconnection/Hot Short........................................ 862 DLT3KX................................................................................ 864 Travel Speed Sensor B: Abnormality................................................ 864 DLT4KX................................................................................ 868 Travel Speed Sensor A: Abnormality................................................ 868 DLT4LC................................................................................ 870 Travel Speed Sensor A & B: Abnormality............................................ 870 DV00KY................................................................................ 872 Alarm Buzzer: Hot Short........................................................... 872 DW26KA................................................................................ 874 Motor 2 Solenoid: Disconnection/Ground Fault...................................... 874 DW26KY................................................................................ 876 Motor 2 Solenoid: Hot Short....................................................... 876 DW7BKY................................................................................ 878 Fan Reverse Solenoid Circuit: Hot Short........................................... 878 DW7BKZ................................................................................ 880 Fan Reverse Solenoid Circuit: Disconnection/Ground Fault.......................... 880 DX16KA................................................................................ 882 Fan EPC Solenoid: Disconnection................................................... 882 DX16KB................................................................................ 884 Fan EPC Solenoid: Ground Fault.................................................... 884 DX16KY................................................................................ 886 Fan EPC Solenoid: Hot Short....................................................... 886 DX19KA................................................................................ 888 Motor 1 Solenoid: Disconnection................................................... 888 DX19KB................................................................................ 890 Motor 1 Solenoid: Ground Fault.................................................... 890 DX19KY................................................................................ 892 Motor 1 Solenoid: Hot Short....................................................... 892 DX20KA................................................................................ 894 Clutch EPC Solenoid: Disconnection................................................ 894 DX20KB................................................................................ 896 Clutch EPC Solenoid: Ground Fault................................................. 896 DX20KY................................................................................ 898 Clutch EPC Solenoid: Hot Short.................................................... 898 DXH7KB................................................................................ 900 Reverse Solenoid: Ground Fault.................................................... 900 DXH7KZ................................................................................ 902 Reverse Solenoid: Disconnection/Hot Short......................................... 902 DXH8KB................................................................................ 904 Forward Solenoid: Ground Fault.................................................... 904 DXH8KZ................................................................................ 906 Forward Solenoid: Disconnection/Hot Short......................................... 906 J141N1................................................................................ 908 Steering Pump: Overrun Alarm...................................................... 908 M100N1................................................................................ 909 HST Pump: Overrun Alarm........................................................... 909 M400N1................................................................................ 910 Motor 1: Overrun Alarm............................................................ 910 TROUBLESHOOTING: E-MODE................................................................... 912 Troubleshooting Electrical System..................................................... 912 Information in Troubleshooting Table.............................................. 912 E-1................................................................................... 914 Engine Does Not Start............................................................. 914 E-2................................................................................... 922 Preheater Does Not Operate Manually............................................... 922 E-3................................................................................... 926 Travel Speed is Low or High....................................................... 926 E-4................................................................................... 932 ECSS Does Not Operate............................................................. 932 E-5................................................................................... 935 ECSS Keeps Operating.............................................................. 935 E-6................................................................................... 938 Defective Boom Kickout Function and Cancellation.................................. 938 E-7................................................................................... 942 Defective Bucket Positioner Function and Cancellation............................. 942 E-8................................................................................... 946 Defective Lift Arm FLOATING Holding Function and Cancellation..................... 946 E-9................................................................................... 950 Travel Direction Selection System Does Not Function............................... 950 E-10.................................................................................. 954 Fan Does Not Reverse.............................................................. 954 E-11.................................................................................. 958 Fan Keeps Rotating in Reverse..................................................... 958 E-12.................................................................................. 960 Wiper Does Not Operate............................................................ 960 E-13.................................................................................. 964 Windshield Washer Does Not Operate................................................ 964 E-14.................................................................................. 967 Headlamp, Clearance Lamp, and Tail Lamp Do Not Light Up or Go Off................. 967 E-15.................................................................................. 975 Working Lamp Does Not Light Up or Go Off.......................................... 975 E-16.................................................................................. 980 Turn Signal Lamp and Hazard Lamp Do Not Light Up or Go Off........................ 980 E-17.................................................................................. 986 Brake Lamp Does Not Light or It Keeps Lighting Up................................. 986 E-18.................................................................................. 988 Backup Lamp Does Not Light or It Keeps Lighting Up................................ 988 E-19.................................................................................. 991 Backup Alarm Does Not Sound or It Keeps Sounding.................................. 991 E-20.................................................................................. 994 Horn Does Not Sound or It Keeps Sounding.......................................... 994 E-21.................................................................................. 996 Alarm Buzzer Does Not Sound or It Keeps Sounding.................................. 996 E-22.................................................................................. 998 Air Conditioner Does Not Operate or Stop.......................................... 998 E-23..................................................................................1001 The KOMTRAX System Does Not Work Properly.........................................1001 Lamp Display Section of KOMTRAX Terminal......................................1003 TROUBLESHOOTING: H-MODE...................................................................1004 Table of Failure Codes and Causes.....................................................1006 Troubleshooting Hydraulic and Mechanical Systems......................................1004 Method of Using Troubleshooting Chart.............................................1004 H-1...................................................................................1008 Machine Does Not Start............................................................1008 H-2...................................................................................1009 Travel Speed Is Slow..............................................................1009 H-3...................................................................................1010 Traction Force Is Weak............................................................1010 H-4...................................................................................1011 Engine Stalls When Traveling or Engine Speed Drops Excessively....................1011 H-5...................................................................................1012 Shift Range is Not Shifted........................................................1012 H-6...................................................................................1013 Steering Wheel Does Not Turn......................................................1013 H-7...................................................................................1014 Steering Wheel Is Heavy...........................................................1014 H-8...................................................................................1015 Steering Wheel Shakes or Jerks....................................................1015 H-9...................................................................................1016 Machine Deviates Naturally to One Side When Traveling.............................1016 H-10..................................................................................1017 Brake Does Not Work or Does Not Work Well.........................................1017 H-11..................................................................................1018 Brake Is Not Released or Is Dragged...............................................1018 H-12..................................................................................1019 Lift Arm Does Not Rise or Lower...................................................1019 H-13..................................................................................1020 Lift Arm Moves Slowly or Lift Arm Rising Force Is Insufficient....................1020 H-14..................................................................................1021 When Rising, Lift Arm Starts to Move Slowly at a Specific Height..................1021 H-15..................................................................................1021 Lift Arm Cylinder Cannot Hold Down The Bucket (Bucket Rises in the Air)...........1021 H-16..................................................................................1021 Hydraulic Drifts of the Lift Arm Occur Often......................................1021 H-17..................................................................................1022 Lift Arm Wobbles During Operation.................................................1022 H-18..................................................................................1022 When Control Lever Is Switched from HOLD to RAISE, Lift Arm Falls Temporarily.....1022 H-19..................................................................................1023 Bucket Does Not Tilt Back.........................................................1023 H-20..................................................................................1024 Bucket Moves Slowly or Tilting-Back Force Is Insufficient.........................1024 H-21..................................................................................1025 Bucket Starts to Operate Slowly in the Midst of Tilting Back......................1025 H-22..................................................................................1025 Bucket Cylinder Cannot Hold Down the Bucket.......................................1025 H-23..................................................................................1025 Hydraulic Drifts of the Bucket Occur Often........................................1025 H-24..................................................................................1026 Bucket Wobbles During Travel with Load............................................1026 H-25..................................................................................1026 When Control Lever Is Switched from HOLD to TILT, the Bucket Falls Temporarily....1026 H-26..................................................................................1027 Control Levers of Lift Arm and Bucket Do Not Move Smoothly and Are Heavy..........1027 H-27..................................................................................1028 ECSS Does Not Operate and Machine Pitches and Bounces.............................1028 H-28..................................................................................1029 Fan Revolution Is Abnormal........................................................1029 50 DISASSEMBLY AND ASSEMBLY...................................................................1031 HOW TO READ THIS MANUAL...................................................................1035 Removal and Installation of Assemblies................................................1035 Disassembly and Assembly of Assemblies................................................1037 COATING MATERIALS LIST....................................................................1039 SPECIAL TOOLS LIST........................................................................1043 SKETCHES OF SPECIAL TOOLS.................................................................1047 CONNECTOR REPAIR PROCEDURES...............................................................1054 Stripping Insulation..................................................................1054 Wire Inspection.......................................................................1054 Contact Terminal Removal (HD30 Type)..................................................1055 Crimping Contact Terminal (HD30 Type).................................................1056 Insertion Of Contact Terminal (HD30 Type).............................................1057 Contact Terminal Removal (DT Type)....................................................1058 Crimping Contact Terminal (DT Type)...................................................1059 Insertion Of Contact Terminal (DT Type)...............................................1060 ENGINE AND COOLING SYSTEM.................................................................1061 Fuel Supply Pump Assembly.............................................................1061 Removal...........................................................................1061 Installation......................................................................1063 Fuel Injector Assembly................................................................1064 Removal...........................................................................1064 Installation......................................................................1069 Cylinder Head Assembly................................................................1073 Removal...........................................................................1073 Installation......................................................................1082 Engine Hood Assembly..................................................................1088 Removal...........................................................................1088 Installation......................................................................1091 Radiator..............................................................................1092 Removal...........................................................................1092 Installation......................................................................1095 Air Aftercooler.......................................................................1096 Removal...........................................................................1096 Installation......................................................................1097 Hydraulic Oil Cooler Assembly.........................................................1098 Removal...........................................................................1098 Installation......................................................................1100 Engine Assembly.......................................................................1101 Removal...........................................................................1101 Installation......................................................................1107 Engine Front Oil Seal Assembly........................................................1109 Removal...........................................................................1109 Installation......................................................................1111 Engine Rear Oil Seal Assembly.........................................................1112 Removal...........................................................................1112 Installation......................................................................1114 Cooling Fan and Fan Motor Assembly....................................................1117 Removal...........................................................................1117 Installation......................................................................1120 Fuel Tank Assembly....................................................................1121 Removal...........................................................................1121 Installation......................................................................1123 POWER TRAIN...............................................................................1124 Transfer..............................................................................1124 Removal...........................................................................1124 Installation......................................................................1127 Transfer Assembly.....................................................................1129 Disassembly.......................................................................1130 Assembly..........................................................................1141 Parking Brake Assembly................................................................1154 Removal...........................................................................1154 Installation......................................................................1155 Disassembly.......................................................................1156 Assembly..........................................................................1159 Front Axle Assembly...................................................................1163 Removal...........................................................................1163 Installation......................................................................1165 Rear Axle Assembly....................................................................1166 Removal...........................................................................1166 Installation......................................................................1169 Axle Housing Assembly.................................................................1170 Disassembly.......................................................................1171 Assembly..........................................................................1177 Differential Assembly.................................................................1186 Disassembly.......................................................................1187 Assembly..........................................................................1199 UNDERCARRIAGE AND FRAME...................................................................1217 Center Hinge Pin......................................................................1217 Removal...........................................................................1217 Installation......................................................................1224 Counterweight.........................................................................1230 Removal...........................................................................1230 Installation......................................................................1231 HYDRAULIC SYSTEM..........................................................................1232 HST Pump and 4-Gear Pump Assembly.....................................................1232 Removal...........................................................................1232 Installation......................................................................1235 HST Pump Assembly.....................................................................1237 Disassembly.......................................................................1237 Assembly..........................................................................1250 HST Motor 1 Assembly..................................................................1270 Removal...........................................................................1270 Installation......................................................................1271 HST Motor 2 Assembly..................................................................1272 Removal...........................................................................1272 Installation......................................................................1273 HST Motor Assembly....................................................................1274 Disassembly.......................................................................1274 Assembly..........................................................................1286 Work Equipment Control Valve Assembly.................................................1296 Removal...........................................................................1296 Installation......................................................................1298 Hydraulic Tank Assembly...............................................................1299 Removal...........................................................................1299 Installation......................................................................1301 Hydraulic Cylinder Assembly...........................................................1302 Disassembly.......................................................................1303 Assembly..........................................................................1306 WORK EQUIPMENT............................................................................1310 Work Equipment Assembly...............................................................1310 Removal...........................................................................1310 Installation......................................................................1314 CAB AND ITS ATTACHMENTS...................................................................1319 Operator’s Cab and Floor Frame Assembly...............................................1319 Removal...........................................................................1319 Installation......................................................................1324 Operator’s Cab Glass (Stuck Glass)....................................................1326 Removal...........................................................................1326 Installation......................................................................1327 Operator’s Seat Assembly..............................................................1335 Disassembly.......................................................................1336 Assembly..........................................................................1343 Air Conditioner Unit..................................................................1348 Removal...........................................................................1348 Installation......................................................................1353 ELECTRICAL SYSTEM.........................................................................1354 Monitor Panel.........................................................................1354 Removal...........................................................................1354 Installation......................................................................1356 Engine Controller Assembly............................................................1357 Removal...........................................................................1357 Installation......................................................................1358 HST Controller Assembly...............................................................1359 Removal...........................................................................1359 Installation......................................................................1359 KOMTRAX Terminal Assembly.............................................................1360 Removal...........................................................................1360 Installation......................................................................1361 WASTE HANDLER GUARDS......................................................................1362 Hydraulic Tank Guard..................................................................1362 Removal...........................................................................1362 Installation......................................................................1364 Rear Light Guards.....................................................................1365 Removal...........................................................................1365 Installation......................................................................1365 Front Light Guards....................................................................1366 Removal...........................................................................1366 Installation......................................................................1366 Front Step............................................................................1367 Removal...........................................................................1367 Installation......................................................................1367 Axle Seal Guards......................................................................1368 Removal...........................................................................1368 Installation......................................................................1368 Boom Cylinder Hose Guards.............................................................1369 Removal...........................................................................1369 Installation......................................................................1369 Front Frame Underguard................................................................1370 Removal...........................................................................1370 Installation......................................................................1370 Fuel Tank Guard.......................................................................1371 Removal...........................................................................1371 Installation......................................................................1372 Rear Frame Underguard.................................................................1373 Removal...........................................................................1373 Installation......................................................................1373 WASTE HANDLER SCREENS.....................................................................1375 Lower Engine Baffle...................................................................1375 Removal...........................................................................1375 Installation......................................................................1375 Hood Screen...........................................................................1376 Removal...........................................................................1376 Installation......................................................................1376 Exhaust Cover.........................................................................1377 Removal...........................................................................1377 Installation......................................................................1377 90 DIAGRAMS AND SCHEMATICS....................................................................1379 AUTOMATIC GREASING CIRCUIT DIAGRAM........................................................1381 HYDRAULIC CIRCUIT DIAGRAM.................................................................1383 ELECTRICAL CIRCUIT DIAGRAM (1/9)..........................................................1384 ELECTRICAL CIRCUIT DIAGRAM (2/9)..........................................................1385 ELECTRICAL CIRCUIT DIAGRAM (3/9)..........................................................1386 ELECTRICAL CIRCUIT DIAGRAM (4/9)..........................................................1387 ELECTRICAL CIRCUIT DIAGRAM (5/9)..........................................................1388 ELECTRICAL CIRCUIT DIAGRAM (6/9)..........................................................1389 ELECTRICAL CIRCUIT DIAGRAM (7/9)..........................................................1390 ELECTRICAL CIRCUIT DIAGRAM (8/9)..........................................................1391 ELECTRICAL CIRCUIT DIAGRAM (9/9)..........................................................1392 ELECTRICAL CIRCUIT DIAGRAM (1/3)..........................................................1393 ELECTRICAL CIRCUIT DIAGRAM (2/3)..........................................................1394 ELECTRICAL CIRCUIT DIAGRAM (3/3)..........................................................1395 CONNECTOR LIST AND STEREOGRAM.............................................................1396
KOMATSU WA320-6 WHEEL LOADER SHOP MANUAL CEBM022801 – PDF DOWNLOAD:
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