Komatsu Wheel Loader WA320H Repair Service Manual
Complete service repair manual with Electrical Wiring Diagrams for Komatsu Wheel Loader WA320-5H, with all the technical information to maintain, diagnose, repair, and rebuild like professional mechanics.
Komatsu Wheel Loader WA320-5H workshop service repair manual includes:
* Numbered table of contents easy to use so that you can find the information you need fast.
* Detailed sub-steps expand on repair procedure information
* Numbered instructions guide you through every repair procedure step by step.
* Troubleshooting and electrical service procedures are combined with detailed wiring diagrams for ease of use.
* Notes, cautions and warnings throughout each chapter pinpoint critical information.
* Bold figure number help you quickly match illustrations with instructions.
* Detailed illustrations, drawings and photos guide you through every procedure.
* Enlarged inset helps you identify and examine parts in detail.
VEAM240100 - Wheel Loader WA320-5H Operation & Maintenance Manual.pdf
VEBM240100 - Wheel Loader WA320-5H Shop Manual.pdf
PRODUCT DETAILS:
Total Pages: 1,211 pages
File Format: PDF (Internal Links, Bookmarked, Table of Contents, Searchable, Printable, high quality)
Language: English
TABLE OF CONTENTS
VEAM240100 - Wheel Loader WA320-5H Operation & Maintenance Manual....1
FOREWORD....2
FOREWORD....3
SAFETY INFORMATION....5
INTRODUCTION....7
INTENDED USE....7
DIRECTIONS OF MACHINE....7
NECESSARY INFORMATION....8
MACHINE SERIAL NO. PLATE AND POSITION....8
ENGINE SERIAL NO. PLATE AND POSITION....8
ROPS/FOPS-CAB SERIAL NO. PLATE....9
AXLE SERIAL NO. PLATE....9
TRANSMISSION SERIAL NO. PLATE....9
SEAT OPERATOR SERIAL NO. PLATE....9
POSITION OF SERVICE METER....10
TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR....10
CONTENTS....11
DIMENSIONS, WEIGHTS AND OPERATING DATA....18
WA320-5H: DIMENSIONS, WEIGHTS AND OPERATING DATA....18
CE-CONFORMING EQUIPMENT....19
CE-CONFORMING EQUIPMENT....19
MANUFACTURER-SUPPLIED CE-CONFORMING EQUIPMENT, ACCORDING TO DOCUMENT 421-93-H1900....20
SAFETY....24
SAFETY LABELS....26
LOCATION OF SAFETY LABELS....26
PRESENTATION OF SAFETY LABELS....27
GENERAL PRECAUTIONS....30
PRECAUTIONS FOR OPERATION....40
STARTING ENGINE....40
OPERATION....42
TRANSPORTATION....48
BATTERY....49
TOWING....51
PRECAUTIONS FOR MAINTENANCE....52
PRECAUTIONS WITH TIRES....59
OPERATION....60
GENERAL VIEW....61
GENERAL VIEW OF MACHINE....61
GENERAL VIEW OF CONTROLS AND GAUGES....62
EXPLANATION OF COMPONENTS....64
MACHINE MONITOR....64
MONITOR SYSTEM....65
TYPES OF WARNING....66
CENTRAL WARNING LAMP....66
CHARACTER DISPLAY PORTION....67
EMERGENCY STOP ITEM....73
CAUTION ITEMS....75
WARNING/LIMIT FUNCTIONS FOR TRAVEL SPEED....77
INSPECTION AND MAINTENANCE ITEM....78
PILOT DISPLAY PORTION....81
METER DISPLAY PORTION....84
OTHER FUNCTIONS OF MACHINE MONITOR....86
SWITCHES....89
CONTROL LEVERS, PEDALS....98
STEERING TILT LOCK LEVER....102
CAP AND COVER WITH LOCK....102
SAFETY BAR....103
TOWING PIN....104
GREASE PUMP....104
CAB DOOR INNER LOCK....104
CAB DOOR OPEN LOCK....105
CAB WINDOW OPEN LOCK CANCEL KNOB....105
FUSE....105
FUSE CAPACITY AND NAME OF CIRCUIT....106
SLOW BLOW FUSE....107
POWER OUTLET....107
STORAGE BOX....107
AIR CONDITIONER....108
GENERAL LOCATIONS AND FUNCTION OF CONTROL PANEL....108
METHOD OF OPERATION....111
PRECAUTIONS WHEN USING....112
HANDLING CAB WIPER....112
PREVENTING DAMAGE TO WIPER ARM BRACKET....112
OPERATION....113
CHECK BEFORE STARTING ENGINE, ADJUST....113
WALK-AROUND CHECK....113
CHECK BEFORE STARTING....116
ADJUSTMENT....122
OPERATIONS AND CHECKS BEFORE STARTING ENGINE....127
STARTING ENGINE....129
NORMAL STARTING....129
STARTING IN COLD WEATHER....131
OPERATIONS AND CHECKS AFTER STARTING ENGINE....133
BREAKING-IN THE MACHINE....133
NORMAL OPERATION....134
STOPPING ENGINE....135
MOVING THE MACHINE (DIRECTIONAL, SPEED), STOPPING THE MACHINE....136
MOVING THE MACHINE....136
CHANGING DIRECTION....138
STOPPING THE MACHINE....140
TURNING....141
EMERGENCY STEERING....142
OPERATION OF WORK EQUIPMENT....143
WORK POSSIBLE USING WHEEL LOADER....145
DIGGING OPERATIONS....145
LEVELING OPERATIONS....148
PUSHING OPERATION....148
LOAD AND CARRY OPERATIONS....148
LOADING OPERATIONS....149
PRECAUTIONS FOR OPERATION....151
PERMISSIBLE WATER DEPTH....151
IF WHEEL BRAKE DOES NOT WORK....151
PRECAUTIONS WHEN DRIVING UP OR DOWN SLOPES....151
ADJUSTING WORK EQUIPMENT POSTURE....153
ADJUSTING BOOM KICKOUT....153
ADJUSTING BUCKET POSITIONER....154
BUCKET LEVEL INDICATOR....154
PARKING MACHINE....155
CHECK AFTER STOPPING ENGINE....156
CHECKS AFTER COMPLETION OF OPERATION....156
LOCKING....157
HANDLING THE TIRES....158
PRECAUTIONS WHEN HANDLING TIRES....158
TIRE PRESSURE....158
PRECAUTIONS FOR USING LOAD AND CARRY METHOD....159
TRANSPORTATION....160
TRANSPORTATION PROCEDURE....160
LOADING, UNLOADING WORK WITH TRAILERS....160
LOADING....160
SECURING MACHINE....161
UNLOADING....162
LIFTING MACHINE....163
LOCATION OF LIFTING POSITION MARK....164
WEIGHT TABLE....164
LIFTING PROCEDURE....165
COLD WEATHER OPERATION....166
PRECAUTIONS FOR LOW TEMPERATURE....166
FUEL AND LUBRICANTS....166
COOLANT....166
BATTERY....167
PRECAUTIONS AFTER COMPLETION OF WORK....167
AFTER COLD WEATHER....168
WARMING-UP OPERATION FOR STEERING HYDRAULIC CIRCUIT IN COLD WEATHER....168
LONG-TERM STORAGE....169
BEFORE STORAGE....169
DURING STORAGE....169
AFTER STORAGE....169
TROUBLESHOOTING....170
WHEN MACHINE RUNS OUT OF FUEL....170
TOWING THE MACHINE....170
WHEN ENGINE CAN BE USED....171
WHEN ENGINE CANNOT BE USED....171
IF BATTERY IS DISCHARGED....172
REMOVAL AND INSTALLATION OF BATTERY....172
PRECAUTIONS FOR CHARGING BATTERY....173
STARTING ENGINE WITH BOOSTER CABLE....174
OTHER TROUBLE....176
ELECTRICAL SYSTEM....176
CHASSIS....177
ENGINE....179
MAINTENANCE....182
GUIDES TO MAINTENANCE....183
OUTLINES OF SERVICE....185
HANDLING OIL, FUEL, COOLANT, GREASE AND CARRYING OUT KOWA (Komatsu Oil Wear Analysis)....185
OIL....185
FUEL....185
COOLANT....186
GREASE....186
CARRYING OUT KOWA (Komatsu Oil Wear Analysis)....186
STORING OIL AND FUEL....187
FILTERS....187
BIODEGRADABLE HYDRAULIC OIL AND LUBRICANTS....188
OUTLINE OF ELECTRIC SYSTEM....188
WEAR PARTS....189
WEAR PARTS LIST....189
FUEL, COOLANT AND LUBRICANTS....190
LUBRICATION CHART....190
PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS....191
STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS....196
TORQUE LIST....196
PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS....197
MAINTENANCE SCHEDULE CHART....198
MAINTENANCE SCHEDULE CHART....198
SERVICE PROCEDURE....200
INITIAL 250 HOURS SERVICE....200
WHEN REQUIRED....201
CHECK, CLEAN, OR REPLACE AIR CLEANER ELEMENT....201
DUST PRE-EXTRACTOR "TURBO II": CHECK, CLEAN....203
CLEAN INSIDE OF COOLING SYSTEM....204
CHECK OIL LEVEL IN TRANSFER CASE, ADD OIL....207
CHECK AXLE OIL LEVEL, ADD OIL....208
CLEAN AXLE CASE BREATHER....209
CLEAN AIR CONDITIONER CONDENSER....210
CHECK WINDOW WASHING FLUID LEVEL, ADD FLUID....210
CLEAN RADIATOR FINS AND COOLER FINS....211
CLEAN TRANSFER OIL COOLER FINS....212
CHECK ELECTRICAL INTAKE AIR HEATER....212
REPLACE BOLT ON CUTTING EDGE....213
REPLACE BUCKET TEETH....214
CHECK AIR CONDITIONER....215
REPLACE SLOW BLOW FUSE....216
SELECTION AND INSPECTION OF TIRES....217
CHECK BEFORE STARTING....219
EVERY 50 HOURS SERVICE....220
DRAIN WATER, SEDIMENT FROM FUEL TANK....220
EVERY 100 HOURS SERVICE....221
LUBRICATE REAR AXLE PIVOT PIN....221
CLEAN ELEMENT IN AIR CONDITIONER FRESH AIR FILTER....221
CHECK OIL LEVEL IN HYDRAULIC TANK, ADD OIL....222
EVERY 250 HOURS SERVICE....223
CHECK BATTERY ELECTROLYTE LEVEL....223
CHECK PARKING BRAKE....225
CHECK AIR CONDITIONER COMPRESSOR BELT TENSION, ADJUST....225
CHECK FOR LOOSE WHEEL HUB BOLTS, TIGHTEN....226
CLEAN ELEMENT IN AIR CONDITIONER RECIRCULATION FILTER....227
LUBRICATING....227
EVERY 500 HOURS SERVICE....229
CHANGE OIL IN ENGINE OIL PAN, REPLACE ENGINE OIL FILTER CARTRIDGE....229
REPLACE FUEL FILTER CARTRIDGE....230
CLEAN WATER SEPARATOR STRAINER....231
EVERY 1000 HOURS SERVICE....232
CHANGE OIL IN TRANSFER CASE....232
CLEAN TRANSFER CASE BREATHER....233
REPLACE HST OIL FILTER ELEMENT....234
LUBRICATING....235
CHECK TIGHTENING PARTS OF TURBOCHARGER....235
CHECK PLAY OF TURBOCHARGER ROTOR....235
CHECK ALTERNATOR DRIVING BELT TENSION AND REPLACEMENT....235
EVERY 2000 HOURS SERVICE....236
CHANGE OIL IN HYDRAULIC TANK, REPLACE HYDRAULIC FILTER ELEMENT....236
REPLACE HYDRAULIC TANK BREATHER ELEMENT....237
CLEANING THE STRAINER OF THE BRAKE FILTER....238
CHANGE AXLE OIL....239
REPLACE ELEMENT IN AIR CONDITIONER RECIRCULATION AIR FILTER, FRESH AIR FILTER....240
CHECK ALTERNATOR, STARTING MOTOR....240
CHECK ENGINE VALVE CLEARANCE, ADJUST....240
CHECK BRAKE DISC WEAR....240
CLEAN AND CHECK TURBOCHARGER....241
CHECK ACCUMULATOR GAS PRESSURE....241
CHECK VIBRATION DAMPER....241
EVERY 4000 HOURS SERVICE....242
LUBRICATING....242
CHECK WATER PUMP....242
TECHNICAL DATA....244
TECHNICAL DATA....245
NOISE EMISSION LEVELS....247
VIBRATION LEVEL....247
ATTACHMENTS, OPTIONS....248
SELECTING BUCKET AND TIRES....249
MACHINE MONITOR WITH LOAD METER....250
EXPLANATION OF COMPONENTS....250
MACHINE MONITOR....250
MONITOR PANEL MODE SELECTOR SWITCH 1....251
MONITOR PANEL MODE SELECTOR SWITCH 2....251
LOAD METER CANCEL SWITCH....251
LOAD METER SUB TOTAL SWITCH....252
MACHINE MONITOR....253
MONITOR SYSTEM....253
TYPES OF WARNING....254
CENTRAL WARNING LAMP....254
CHARACTER DISPLAY PORTION....255
EMERGENCY STOP ITEM....261
CAUTION ITEMS....264
WARNING/LIMIT FUNCTIONS FOR TRAVEL SPEED....266
INSPECTION AND MAINTENANCE ITEM....267
PILOT DISPLAY PORTION....270
METER DISPLAY PORTION....273
LOAD METER....275
OTHER FUNCTIONS OF MACHINE MONITOR....298
HANDLING MULTI-FUNCTION LEVER....305
EXPLANATION OF COMPONENTS....305
WORK EQUIPMENT LEVER....305
DIRECTIONAL SELECTOR SWITCH....306
DIRECTIONAL SELECTOR SWITCH ACTUATION SWITCH....306
DIRECTIONAL SELECTOR PILOT LAMP....307
OPERATION....308
USING SWITCH TO CHANGE BETWEEN FORWARD AND REVERSE....308
CENTRAL LUBRICATION SYSTEM....310
OPERATING THE CENTRAL LUBRICATION SYSTEM....310
DISPLAY AND CONTROL UNIT....310
LED-DISPLAY....311
PUSHBUTTONS....311
CHANGING THE LUBRICATION INTERVAL TIMES....312
INDEX....314
INDEX....316
A....316
C....316
D....316
E....316
F....316
G....316
H....316
I....316
L....316
M....316
N....316
O....316
P....316
R....317
S....317
T....317
U....317
V....317
W....317
NOTES....318
NOTES....319
VEBM240100 - Wheel Loader WA320-5H Shop Manual....322
SAFETY....324
SAFETY NOTICE....324
IMPORTANT SAFETY NOTICE....324
GENERAL PRECAUTIONS....324
PREPARATIONS FOR WORK....324
PRECAUTIONS DURING WORK....325
FOREWORD....326
GENERAL....326
STRUCTURE AND FUNCTION....326
TESTING AND ADJUSTING....326
DISASSEMBLY AND ASSEMBLY....326
MAINTENANCE STANDARD....326
OTHERS....326
HOW TO READ THE SHOP MANUAL....327
VOLUMES....327
DISTRIBUTION AND UPDATING....327
FILING METHOD....327
REVISED EDITION MARK....327
REVISIONS....327
SYMBOLS....327
HOISTING INSTRUCTIONS....328
HOISTING....328
WIRE ROPES....328
METHOD OF DISASSEMBLING, CONNECTING PUSH-PULL TYPE COUPLER....329
Disconnection....329
Connection....329
COATING MATERIALS....331
STANDARD TIGHTENING TORQUE....333
STANDARD TIGHTENING TORQUE TABLE (WHEN USING TORQUE WRENCH)....333
TABLE OF TIGHTENING TORQUES FOR FLARED NUTS....333
TABLE OF TIGHTENING TORQUES FOR SPLIT FLANGE BOLTS....334
TABLE OF TIGHTENING TORQUES FOR O-RING BOSS PIPING JOINTS....334
TABLE OF TIGHTENING TORQUES FOR O-RING BOSS PLUGS....334
TIGHTENING TORQUE FOR 102 ENGINE SERIES....335
Tightening torque table for hoses (taper seal type and face seal type)....335
ELECTRIC WIRE CODE....336
CLASSIFICATION BY THICKNESS....336
CLASSIFICATION BY COLOR AND CODE....336
CONVERSION TABLE....337
METHOD OF USING THE CONVERSION TABLE....337
EXAMPLE....337
Millimeters to inches....337
Millimeters to Inches....338
Kilogram to Pound....338
Liter to U.S. Gallon....339
Liter to U.K. Gallon....339
kgm to ft. lb....340
kg/cm2 to lb/in2....341
Temperature....342
UNITS....343
Example:....343
01 GENERAL....344
GENERAL ASSEMBLY DRAWINGS....345
SPECIFICATIONS....346
WEIGHT TABLE....350
PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS....352
10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD....354
Engine mount and transfer mount....355
Damper....356
Outline....356
Cooling system....357
Specification....357
Power train....358
Power train system diagram....359
Outline....360
Drive shaft (propeller shaft)....361
Outline....361
HST hydraulic piping diagram....362
HST pump....363
Specifications....363
Operation....364
Flow of power....364
Flow of oil....364
High-pressure relief valve....365
Function....365
Operation....366
Low-pressure relief valve....367
Function....367
Operation....367
HST charge pump....368
Outline....368
Specifications....368
Function....368
Speed-related valve (DA valve)....369
Function....369
Operation....369
High-pressure cut-off valve....370
Function....370
Operation....370
HST motor....371
HST motor 1....371
Specifications....371
HST motor 2....372
Specifications....372
Principle....373
Structure....373
Operation....373
EP servo valve....374
Function....374
Operation....374
HA servo valve....375
Function....375
Operation....375
Forward-reverse shuttle valve....376
Function....376
Operation....376
Transfer....377
Outline....377
Relationship between transfer clutch and transfer clutch pressure at each gear speed....377
Input shaft portion....379
Output shaft portion....381
Operation of clutch....385
When clutch is ON (fixed)....385
When clutch is OFF (released)....385
Low-speed mode....386
Operation....386
High-speed mode....387
Operation....387
Clutch solenoid valve....388
Operation....388
Axle....389
FRONT AXLE....389
REAR AXLE....390
Differential....391
FRONT DIFFERENTIAL....391
REAR DIFFERENTIAL....393
Outline....395
When traveling in a straight line....395
When turning....395
Torque proportioning differential....396
Outline....396
Operation....397
Straight travel (When the road resistances under both tires are the same)....397
Travel on soft ground (When the road resistances under both tires are different)....397
Limited-slip differential....399
FRONT....399
Operation of limited-slip differential....401
Brake torque generation mechanism of left and right side gears (5)....401
When traveling in a straight line....401
When turning....402
Final drive....403
Outline....404
Axle mounting and center hinge pin....405
Outline....406
Steering piping....410
Steering column....411
Priority valve....412
Outline....413
Operation....413
Orbit-roll valve....415
Outline....416
Structure....416
Operation....417
CONNECTION BETWEEN HAND PUMP AND SLEEVE....421
Role of centering spring....422
Cushion valve....423
Outline....423
Function....423
Steering cylinder....424
Emergency steering piping....426
Emergency steering valve....427
Operation....428
When engine and steering pump are normal....428
When engine or steering pump is abnormal....429
Brake piping....430
Brake valve....431
Outline....432
Operation....432
When only either brake operates (When either brake fails)....432
Inching valve....435
Outline....435
Charge valve....437
Function....438
Operation....439
Accumulator (for brake)....441
Function....441
Slack adjuster....442
Function....443
Operation....443
When brake is applied....443
When brake is released....443
Brake....444
Outline....445
Outline....445
When brake is applied....445
When brake is released....445
Parking brake control....446
Outline....446
Parking brake....447
Outline....447
white 10-96....449
Hydraulic piping....451
Outline....452
Work equipment lever linkage....453
2-lever type....453
Multi function mono-lever type....454
(If equipped)....454
Hydraulic tank....455
Specifications....455
Breather....456
Prevention of negative pressure in tank....456
Prevention of rise of pressure in tank....456
4-gear pump unit....457
SAR(3)90 + (2)32 + SBR(1)18 + 12....457
Outline....457
Accumulator (for PPC circuit)....459
Outline....459
Specifications....459
Lock valve....460
Outline....460
E. C. S. S. valve....461
(E. C. S. S. : Electronically Controlled Suspension System)....461
(If equipped)....461
Accumulator (forE.C.S.S.)....463
(If equipped)....463
Function....463
Specifications....463
Hydraulic piping of cooling system....464
Outline....464
Cooling fan motor....465
Specifications....465
Function....466
Principle of operation....466
Work equipment control valve....468
1. 2-Spool valve....468
2. 3-spool valve....472
3. Relief valve....475
Function....475
Operation....475
4. Safety-suction valve....476
Function....476
Operation....476
(1) Operation as safety valve....476
(2) Operation as suction valve....477
5. Suction valve....477
Function....477
Operation....477
6. Cut-off valve....479
Function....481
Operating condition of cut-off valve....481
(1) When work equipment pump pressure is lower than cut-off pressure....481
(2) When work equipment pump pressure is higher than cut-off pressure....482
7. Operation of work equipment control valve....483
(1) Lift arm and bucket spool neutral position....483
Operation....483
(2) Lift arm spool raise position....484
Operation....484
(3) Lift arm spool lower position....485
Operation....485
(4) Lift arm spool float position....486
Operation....486
(5) Bucket spool dump position....487
Operation....487
(6) Bucket spool tilt position....488
Operation....488
Work equipment PPC valve....489
2-lever type....489
Operation....491
Mono-lever type....495
Operation....497
Attachment PPC valve....501
Operation....503
Work equipment linkage....505
Bucket....507
Bucket positioner and boom kick-out....509
Outline....510
Bucket positioner....510
Boom kick-out....510
Operation of proximity switch....511
When bucket is tilted....511
Function of proximity switch....512
When object of sensing is over sensing face of proximity switch....512
When object of sensing is apart from over sensing face of proximity switch....512
When lift arm is raised....513
Function of proximity switch....514
When object of sensing is over sensing face of proximity switch....514
When object of sensing is apart from over sensing face of proximity switch....514
Work equipment cylinder....515
LIFT CYLINDER....515
BUCKET CYLINDER....515
Air conditioner....516
AIR CONDITIONER PIPING....516
Machine monitoring system....517
Outline....517
Individual circuit diagrams of the machine monitor....519
Starting and lighting....519
Power supply and network....521
Speed meter specification....521
Load meter specification....521
Sensing....523
HST safety control....524
Autmatic preheating....525
Load meter....526
Load meter specification....526
Machine monitor....529
Speed meter specification....529
Load meter specification (If equipped)....530
List of items displayed on monitor....531
Service mode functions....535
Items Related to the Fault History of Electric System....541
Items Related to the Fault History of Machine System....544
Real-time monitor function Speed meter specification....546
Real-time monitor function Load meter specification....549
Real-time Monitoring Items....552
(Reference) Inspection with real-time monitor....555
Tuning function....556
Maintenance functions....558
How to input interval....560
Setting required when optional device is installed....562
Function of selecting optional device....562
Speed meter specification....562
Selection of tire deviation....563
Function of selecting optional device....565
Load meter specification....565
Selection of tire deviation....566
Selection of lift arm deviation....566
Selection of printer setting state....566
Machine serial No. setting function....568
Load Meter Function....569
Input / Ouput signal....578
Speed meter specification....578
Load meter specification....580
Electrical system (HST controller system)....585
System diagram....585
Control function....586
HST controller....589
Input and output signals....589
Function of selecting directional selector switch....590
(If equipped)....590
Outline....590
Function....590
Operation....591
When travel direction is changed with directional lever....591
When directional selector switch is selected to be used....591
When travel direction is changed with directional selector switch....591
When directional lever has priority....591
Engine start circuit....592
Function....592
Operation....593
Engine stop circuit....594
Operation....594
Preheating circuit (automatic preheating system)....595
Outline....595
Operation....595
Parking brake circuit....596
Operation....597
Electronically controlled suspension system....599
Electronically Controlled Suspension System (Abbreviation: ECSS)....599
(If equipped)....599
Function....599
System operation table....599
Sensors....600
Engine speed sensor....600
Function....600
Speed sensor....600
Function....600
ENGINE OIL PRESSURE SENSOR....601
Function....601
FUEL LEVEL SENSOR....601
Function....601
COOLANT TEMPERATURE SENSOR (FORMONITOR)....602
HST oil temperature sensor....602
Function....602
COOLANT TEMPERATURE SENSOR (FOR PREHEATING)....602
Function....602
Axle oil temperature sensor....603
Function....603
HST oil pressure sensor Oil puressure sensor for load meter (Load meter specification)....603
Function....603
Steering oil pressure sensor....604
(Machines equipped emergency steering)....604
Emergency steering oil pressure sensor....604
(Machines equipped emergency steering)....604
Function....604
HST filter clogging sensor....604
Function....604
COOLANT LEVEL SENSOR....605
Function....605
Engine oil level sensor....606
Function....606
Air cleaner clogging sensor....606
Function....606
Lift arm angle sensor (Load meter specification) (If equipped)....607
Function....607
STANDARD VALUE TABLE FOR engine....609
STANDARD VALUE TABLE FOR CHASSIS....610
20 TESTING AND ADJUSTING....608
Tools for testing, adjusting, and troubleshooting....615
Measuring engine speed....617
Measuring exhaust gas color....618
Adjusting valve clearance....620
Measuring compression pressure....621
Measuring blow-by pressure....622
Testing and adjusting fuel injection timing....623
Measuring engine oil pressure....624
Measuring, testing operating force of accelerator pedal....625
Adjusting engine stop solenoid....627
Adjusting engine speed sensor....628
Testing and adjusting air conditioner compressor belt tension....628
Measuring directional lever....629
Testing and adjusting HST oil pressure....629
Measuring clutch control pressure....634
Testing and adjusting steering wheel....635
Testing and adjusting steering oil pressure....636
Bleeding air from steering circuit....637
Testing hydraulic fan....638
Measuring brake pedal....639
Testing and adjusting brake pedal linkage....640
Measuring brake oil pressure....643
Bleeding air from brake circuit....646
Measuring parking brake performance....647
Measuring and adjusting work equipment control lever....649
Testing and adjusting work equipment hydraulic pressure....650
Testing and adjusting work equipment PPC oil pressure....651
Bleeding air....653
Releasing remaining pressure in hydraulic circuit....654
Testing and adjusting bucket positioner....654
Testing and adjusting of boom kick-out....656
Checking proximity switch actuation display lamp....657
Special functions of machine monitor....659
Pm CLINIC INSPECTION CHART....692
TESTING AND ADJUSTING....614
Points to remember when troubleshooting....695
Sequence of events in troubleshooting....696
Precautions when carrying out maintenance....697
Check before troubleshooting....705
Categories, procedure, and method of using troubleshooting charts....706
Phenomena considered to be failures and troubleshooting no....707
Connection table for connector pin numbers....710
T-adapter table....731
Connector types and mounting locat....734
ions....734
Connector layout drawing....741
TROUBLESHOOTING....694
Before troubleshooting code display....747
Before troubleshooting electrical system....749
Information contained in troubuleshooting table....750
TROUBLESHOOTING OF HST CONTROLLER SYSTEM (HST MODE)....746
Before troubleshooting code display....781
Before troubleshooting electrical system....783
Information contained in troubuleshooting table....784
TROUBLESHOOTING OF monitor SYSTEM (mon MODE)....778
Before troubleshooting electrical system....919
Information contained in troubuleshooting table....920
TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE)....918
Method of using troubleshooting chart....1001
Failure code and cause table....1003
TROUBLESHOOTING OF HYDRAULIC, MECHANICAL SYSTEM (H MODE)....1000
Method of using troubleshooting charts....1025
TROUBLESHOOTING OF ENGINE (S MODE)....1024
How to read this manual....1049
Removal and installation of assemblies....1049
Disassembly and assembly of assemblies....1050
Precautions when carrying out operation....1051
Special tool list....1053
Sketch of special tools....1056
Removal, installation of fuel injection pump assembly....1061
Special tools....1061
Removal....1061
Installation....1063
Removal, installation of nozzle holder assembly....1065
Special tools....1065
Removal....1065
Installation....1066
Removal, installation of cylinder head assembly....1067
Special tools....1067
Removal....1067
Installation....1072
Removal, installation of engine assembly....1075
Removal....1075
Installation....1080
Removal, installation of radiator assembly....1082
Removal....1082
Installation....1082
Removal, installation of air aftercooler....1083
Removal....1083
Installation....1084
Removal, installation of hydraulic oil cooler assembly....1085
Removal....1085
Installation....1086
Removal, installation of cooling fan and fan motor assembly....1087
Removal....1087
Installation....1088
Removal, installation of fuel tank assembly....1089
Removal....1089
Installation....1090
Removal, installation of transfer....1091
Removal....1091
Installation....1092
Disassembly, assembly of transfer assembly....1093
Special tools....1093
Disassembly....1093
Assembly....1101
Removal, installation of parking brake assembly....1113
Removal....1113
Installation....1114
Disassembly, assembly of parking brake assembly....1115
Special tools....1115
Disassembly....1115
Assembly....1117
Removal, installation of front axle assembly....1120
Removal....1120
Installation....1121
Removal, installation of rear axle assembly....1122
Removal....1122
Installation....1124
Disassembly, assembly of axle housing assembly....1125
Special tools....1125
Disassembly....1125
Assembly....1130
Disassembly, assembly of differential assembly....1138
Special tools....1138
Assembly....1147
Removal, installation of HST pump and 4-gear pump assembly....1162
Removal....1162
Installation....1164
Removal, installation of HST motor 1 assembly....1165
Removal....1165
Installation....1166
Removal, installation of HST motor 2 assembly....1167
Removal....1167
Installation....1168
Removal, installation of work equipment control valve assembly....1169
Removal....1169
Installation....1170
Removal, installation of travel damper valve assembly....1171
Removal....1171
Installation....1172
Removal, installation of hydraulic tank assembly....1173
Removal....1173
Installation....1174
Removal, installation of work equipment assembly....1175
Removal....1175
Installation....1178
Disassembly and assembly of HST pump assembly....1182
Special tools list....1182
Disassembly....1182
Assembly....1191
Disassembly and assembly of HST motor assembly....1209
Special tools list....1209
Disassembly....1209
Assembly....1218
Disassembly, assembly of hydraulic cylinder assembly....1225
Special tools....1225
Disassembly....1225
Assembly....1228
Removal, installation of operator's cab assembly....1232
Special tools....1232
Removal....1232
Installation....1236
Removal, installation of operator's cab glass (Stuckglass)....1238
Special tools....1238
Removal....1238
Installation....1239
Coating materials....1245
Removal, installation of center hinge pin....1246
Special tools....1246
Removal....1246
Installation....1251
Removal, installation of counterweight....1257
Removal....1257
Installation....1258
Removal, installation of air conditioner unit assembly....1259
Special tools....1259
Removal....1259
Installation....1261
Removal, installation of air conditioner compressor assembly....1262
Special tools....1262
Removal....1262
Installation....1262
Removal, installation of monitor panel....1263
Removal....1263
Installation....1266
30 DISASSEMBLY AND ASSEMBLY....1048
90 OTHERS....1268
Komatsu Wheel Loader WA320H Repair Service Manual
