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Komatsu WA320-5H Wheel Loader Shop Manual (H50051 and up) – PDF DOWNLOAD

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Komatsu WA320-5H Wheel Loader Shop Manual (H50051 and up)

MACHINE MODEL
WA320-5H
SERIAL NUMBER
H50051 and up

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Description

Komatsu WA320-5H Wheel Loader Shop Manual (H50051 and up)

FILE DETAILS:

Komatsu WA320-5H Wheel Loader Shop Manual (H50051 and up)

File Format : PDF
Language : English
Bookmarked : Yes
Searchable : Yes
Printable : Yes
Product Code : VEBM240100
Total Pages : 972

DESCRIPTION:

Komatsu WA320-5H Wheel Loader Shop Manual (H50051 and up)

FOREWORD:
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 chapters: these chapters are further divided into the each main group of components.

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.
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 charts correlating “problems” to “Causes” are also included in this section.
DISASSEMBLY AND ASSEMBLY:
This section explains the order to be followed when removing, installing, disassembling or assembling eachr component, as well as precautions to be taken for these operations.
MAINTENANCE STANDARD:
This section gives the judgement standards when inspecting disassembled parts.
OTHERS:
This section mainly gives hydraulic circuit diagrams and electric circuit diagrams. In addition, this section may give the specifications of attachments and options together.

TABLE OF CONTENTS:

Komatsu WA320-5H Wheel Loader Shop Manual (H50051 and up)

SAFETY............................................................................................  3
	SAFETY NOTICE.................................................................................  3
		IMPORTANT SAFETY NOTICE...................................................................  3
		GENERAL PRECAUTIONS.......................................................................  3
		PREPARATIONS FOR WORK.....................................................................  3
		PRECAUTIONS DURING WORK...................................................................  4
FOREWORD..........................................................................................  5
	GENERAL.......................................................................................  5
		STRUCTURE AND FUNCTION....................................................................  5
		TESTING AND ADJUSTING.....................................................................  5
		DISASSEMBLY AND ASSEMBLY..................................................................  5
		MAINTENANCE STANDARD......................................................................  5
		OTHERS....................................................................................  5
	HOW TO READ THE SHOP MANUAL...................................................................  6
		VOLUMES...................................................................................  6
		DISTRIBUTION AND UPDATING.................................................................  6
		FILING METHOD.............................................................................  6
		REVISED EDITION MARK......................................................................  6
		REVISIONS.................................................................................  6
		SYMBOLS...................................................................................  6
	HOISTING INSTRUCTIONS.........................................................................  7
		HOISTING..................................................................................  7
		WIRE ROPES................................................................................  7
	METHOD OF DISASSEMBLING, CONNECTING PUSH-PULL TYPE COUPLER....................................  8
		Disconnection.............................................................................  8
		Connection................................................................................  8
	COATING MATERIALS............................................................................. 10
	STANDARD TIGHTENING TORQUE.................................................................... 12
		STANDARD TIGHTENING TORQUE TABLE (WHEN USING TORQUE WRENCH)............................... 12
		TABLE OF TIGHTENING TORQUES FOR FLARED NUTS............................................... 12
		TABLE OF TIGHTENING TORQUES FOR SPLIT FLANGE BOLTS........................................ 13
		TABLE OF TIGHTENING TORQUES FOR O-RING BOSS PIPING JOINTS................................. 13
		TABLE OF TIGHTENING TORQUES FOR O-RING BOSS PLUGS......................................... 13
		TIGHTENING TORQUE FOR 102 ENGINE SERIES................................................... 14
		Tightening torque table for hoses (taper seal type and face seal type).................... 14
	ELECTRIC WIRE CODE............................................................................ 15
		CLASSIFICATION BY THICKNESS............................................................... 15
		CLASSIFICATION BY COLOR AND CODE.......................................................... 15
	CONVERSION TABLE.............................................................................. 16
		METHOD OF USING THE CONVERSION TABLE...................................................... 16
		EXAMPLE................................................................................... 16
		Millimeters to inches..................................................................... 16
		Millimeters to Inches..................................................................... 17
		Kilogram to Pound......................................................................... 17
		Liter to U.S. Gallon...................................................................... 18
		Liter to U.K. Gallon...................................................................... 18
		kgm to ft. lb............................................................................. 19
		kg/cm2 to lb/in2.......................................................................... 20
		Temperature............................................................................... 21
	UNITS......................................................................................... 22
		Example:.................................................................................. 22
01 GENERAL........................................................................................ 23
	GENERAL ASSEMBLY DRAWINGS..................................................................... 24
	SPECIFICATIONS................................................................................ 25
	WEIGHT TABLE.................................................................................. 29
	PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS.............................................. 31
10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD................................................... 33
	Engine mount and transfer mount............................................................... 34
	Damper........................................................................................ 35
		Outline................................................................................... 35
	Cooling system................................................................................ 36
		Specification............................................................................. 36
	Power train................................................................................... 37
	Power train system diagram.................................................................... 38
		Outline................................................................................... 39
	Drive shaft (propeller shaft)................................................................. 40
		Outline................................................................................... 40
	HST hydraulic piping diagram.................................................................. 41
	HST pump...................................................................................... 42
		Specifications............................................................................ 42
		Operation................................................................................. 43
		Flow of power............................................................................. 43
		Flow of oil............................................................................... 43
	High-pressure relief valve.................................................................... 44
		Function.................................................................................. 44
		Operation................................................................................. 45
	Low-pressure relief valve..................................................................... 46
		Function.................................................................................. 46
		Operation................................................................................. 46
	HST charge pump............................................................................... 47
		Outline................................................................................... 47
		Specifications............................................................................ 47
		Function.................................................................................. 47
	Speed-related valve (DA valve)................................................................ 48
		Function.................................................................................. 48
		Operation................................................................................. 48
	High-pressure cut-off valve................................................................... 49
		Function.................................................................................. 49
		Operation................................................................................. 49
	HST motor..................................................................................... 50
		HST motor 1............................................................................... 50
		Specifications............................................................................ 50
		HST motor 2............................................................................... 51
		Specifications............................................................................ 51
		Principle................................................................................. 52
		Structure................................................................................. 52
		Operation................................................................................. 52
	EP servo valve................................................................................ 53
		Function.................................................................................. 53
		Operation................................................................................. 53
	HA servo valve................................................................................ 54
		Function.................................................................................. 54
		Operation................................................................................. 54
	Forward-reverse shuttle valve................................................................. 55
		Function.................................................................................. 55
		Operation................................................................................. 55
	Transfer...................................................................................... 56
		Outline................................................................................... 56
		Relationship between transfer clutch and transfer clutch pressure at each gear speed...... 56
		Input shaft portion....................................................................... 58
		Output shaft portion...................................................................... 60
		Operation of clutch....................................................................... 64
		When clutch is ON (fixed)................................................................. 64
		When clutch is OFF (released)............................................................. 64
		Low-speed mode............................................................................ 65
		Operation................................................................................. 65
		High-speed mode........................................................................... 66
		Operation................................................................................. 66
	Clutch solenoid valve......................................................................... 67
		Operation................................................................................. 67
	Axle.......................................................................................... 68
		FRONT AXLE................................................................................ 68
		REAR AXLE................................................................................. 69
	Differential.................................................................................. 70
		FRONT DIFFERENTIAL........................................................................ 70
		REAR DIFFERENTIAL......................................................................... 72
		Outline................................................................................... 74
		When traveling in a straight line......................................................... 74
		When turning.............................................................................. 74
		Torque proportioning differential......................................................... 75
			Outline............................................................................... 75
			Operation............................................................................. 76
			Straight travel (When the road resistances under both tires are the same)............. 76
			Travel on soft ground (When the road resistances under both tires are different)...... 76
	Limited-slip differential..................................................................... 78
		FRONT..................................................................................... 78
		Operation of limited-slip differential.................................................... 80
			Brake torque generation mechanism of left and right side gears (5).................... 80
			When traveling in a straight line..................................................... 80
			When turning.......................................................................... 81
	Final drive................................................................................... 82
		Outline................................................................................... 83
	Axle mounting and center hinge pin............................................................ 84
		Outline................................................................................... 85
	Steering piping............................................................................... 89
	Steering column............................................................................... 90
	Priority valve................................................................................ 91
		Outline................................................................................... 92
		Operation................................................................................. 92
	Orbit-roll valve.............................................................................. 94
		Outline................................................................................... 95
		Structure................................................................................. 95
		Operation................................................................................. 96
		CONNECTION BETWEEN HAND PUMP AND SLEEVE...................................................100
		Role of centering spring..................................................................101
	Cushion valve.................................................................................102
		Outline...................................................................................102
		Function..................................................................................102
	Steering cylinder.............................................................................103
	Emergency steering piping.....................................................................105
	Emergency steering valve......................................................................106
		Operation.................................................................................107
		When engine and steering pump are normal..................................................107
		When engine or steering pump is abnormal..................................................108
	Brake piping..................................................................................109
	Brake valve...................................................................................110
		Outline...................................................................................111
		Operation.................................................................................111
		When only either brake operates (When either brake fails).................................111
	Inching valve.................................................................................114
		Outline...................................................................................114
	Charge valve..................................................................................116
		Function..................................................................................117
		Operation.................................................................................118
	Accumulator (for brake).......................................................................120
		Function..................................................................................120
	Slack adjuster................................................................................121
		Function..................................................................................122
		Operation.................................................................................122
		When brake is applied.....................................................................122
		When brake is released....................................................................122
	Brake.........................................................................................123
		Outline...................................................................................124
		Outline...................................................................................124
		When brake is applied.....................................................................124
		When brake is released....................................................................124
	Parking brake control.........................................................................125
		Outline...................................................................................125
	Parking brake.................................................................................126
		Outline...................................................................................126
		white 10-96...............................................................................128
	Hydraulic piping..............................................................................130
		Outline...................................................................................131
	Work equipment lever linkage..................................................................132
		2-lever type..............................................................................132
		Multi function mono-lever type............................................................133
		(If equipped).............................................................................133
	Hydraulic tank................................................................................134
		Specifications............................................................................134
		Breather..................................................................................135
		Prevention of negative pressure in tank...................................................135
		Prevention of rise of pressure in tank....................................................135
	4-gear pump unit..............................................................................136
		SAR(3)90 + (2)32 + SBR(1)18 + 12..........................................................136
		Outline...................................................................................136
	Accumulator (for PPC circuit).................................................................138
		Outline...................................................................................138
		Specifications............................................................................138
	Lock valve....................................................................................139
		Outline...................................................................................139
	E. C. S. S. valve.............................................................................140
		(E. C. S. S. : Electronically Controlled Suspension System)...............................140
		(If equipped).............................................................................140
	Accumulator (forE.C.S.S.).................................................................142
		(If equipped).............................................................................142
		Function..................................................................................142
		Specifications............................................................................142
	Hydraulic piping of cooling system............................................................143
		Outline...................................................................................143
	Cooling fan motor.............................................................................144
		Specifications............................................................................144
		Function..................................................................................145
		Principle of operation....................................................................145
	Work equipment control valve..................................................................147
		1. 2-Spool valve..........................................................................147
		2. 3-spool valve..........................................................................151
		3. Relief valve...........................................................................154
		Function..................................................................................154
		Operation.................................................................................154
		4. Safety-suction valve...................................................................155
		Function..................................................................................155
		Operation.................................................................................155
		(1) Operation as safety valve.............................................................155
		(2) Operation as suction valve............................................................156
		5. Suction valve..........................................................................156
		Function..................................................................................156
		Operation.................................................................................156
		6. Cut-off valve..........................................................................158
		Function..................................................................................160
		Operating condition of cut-off valve......................................................160
		(1) When work equipment pump pressure is lower than cut-off pressure......................160
		(2) When work equipment pump pressure is higher than cut-off pressure.....................161
		7. Operation of work equipment control valve..............................................162
		(1) Lift arm and bucket spool neutral position............................................162
		Operation.................................................................................162
		(2) Lift arm spool raise position.........................................................163
		Operation.................................................................................163
		(3) Lift arm spool lower position.........................................................164
		Operation.................................................................................164
		(4) Lift arm spool float position.........................................................165
		Operation.................................................................................165
		(5) Bucket spool dump position............................................................166
		Operation.................................................................................166
		(6) Bucket spool tilt position............................................................167
		Operation.................................................................................167
	Work equipment PPC valve......................................................................168
		2-lever type..............................................................................168
		Operation.................................................................................170
		Mono-lever type...........................................................................174
		Operation.................................................................................176
	Attachment PPC valve..........................................................................180
		Operation.................................................................................182
	Work equipment linkage........................................................................184
	Bucket........................................................................................186
	Bucket positioner and boom kick-out...........................................................188
		Outline...................................................................................189
		Bucket positioner.........................................................................189
		Boom kick-out.............................................................................189
		Operation of proximity switch.............................................................190
		When bucket is tilted.....................................................................190
		Function of proximity switch..............................................................191
		When object of sensing is over sensing face of proximity switch...........................191
		When object of sensing is apart from over sensing face of proximity switch................191
		When lift arm is raised...................................................................192
		Function of proximity switch..............................................................193
		When object of sensing is over sensing face of proximity switch...........................193
		When object of sensing is apart from over sensing face of proximity switch................193
	Work equipment cylinder.......................................................................194
		LIFT CYLINDER.............................................................................194
		BUCKET CYLINDER...........................................................................194
	Air conditioner...............................................................................195
		AIR CONDITIONER PIPING....................................................................195
	Machine monitoring system.....................................................................196
		Outline...................................................................................196
		Individual circuit diagrams of the machine monitor........................................198
		Starting and lighting.....................................................................198
		Power supply and network..................................................................200
		Speed meter specification.................................................................200
		Load meter specification..................................................................200
		Sensing...................................................................................202
		HST safety control........................................................................203
		Autmatic preheating.......................................................................204
		Load meter................................................................................205
		Load meter specification..................................................................205
	Machine monitor...............................................................................208
		Speed meter specification.................................................................208
		Load meter specification (If equipped)....................................................209
	List of items displayed on monitor............................................................210
		Service mode functions....................................................................214
		Items Related to the Fault History of Electric System.....................................220
		Items Related to the Fault History of Machine System......................................223
		Real-time monitor function Speed meter specification......................................225
		Real-time monitor function Load meter specification.......................................228
		Real-time Monitoring Items................................................................231
		(Reference) Inspection with real-time monitor.............................................234
		Tuning function...........................................................................235
		Maintenance functions.....................................................................237
		How to input interval.....................................................................239
		Setting required when optional device is installed........................................241
		Function of selecting optional device.....................................................241
		Speed meter specification.................................................................241
		Selection of tire deviation...............................................................242
		Function of selecting optional device.....................................................244
		Load meter specification..................................................................244
		Selection of tire deviation...............................................................245
		Selection of lift arm deviation...........................................................245
		Selection of printer setting state........................................................245
		Machine serial No. setting function.......................................................247
		Load Meter Function.......................................................................248
			Input / Ouput signal..................................................................257
			Speed meter specification.............................................................257
			Load meter specification..............................................................259
	Electrical system (HST controller system).....................................................264
		System diagram............................................................................264
		Control function..........................................................................265
	HST controller................................................................................268
		Input and output signals..................................................................268
	Function of selecting directional selector switch.............................................269
		(If equipped).............................................................................269
		Outline...................................................................................269
		Function..................................................................................269
		Operation.................................................................................270
		When travel direction is changed with directional lever...................................270
		When directional selector switch is selected to be used...................................270
		When travel direction is changed with directional selector switch.........................270
		When directional lever has priority.......................................................270
	Engine start circuit..........................................................................271
		Function..................................................................................271
		Operation.................................................................................272
	Engine stop circuit...........................................................................273
		Operation.................................................................................273
	Preheating circuit (automatic preheating system)..............................................274
		Outline...................................................................................274
		Operation.................................................................................274
	Parking brake circuit.........................................................................275
		Operation.................................................................................276
	Electronically controlled suspension system...................................................278
		Electronically Controlled Suspension System (Abbreviation: ECSS)..........................278
		(If equipped).............................................................................278
		Function..................................................................................278
		System operation table....................................................................278
	Sensors.......................................................................................279
		Engine speed sensor.......................................................................279
		Function..................................................................................279
		Speed sensor..............................................................................279
		Function..................................................................................279
		ENGINE OIL PRESSURE SENSOR................................................................280
		Function..................................................................................280
		FUEL LEVEL SENSOR.........................................................................280
		Function..................................................................................280
		COOLANT TEMPERATURE SENSOR (FORMONITOR)...................................................281
		HST oil temperature sensor................................................................281
		Function..................................................................................281
		COOLANT TEMPERATURE SENSOR (FOR PREHEATING)...............................................281
		Function..................................................................................281
		Axle oil temperature sensor...............................................................282
		Function..................................................................................282
		HST oil pressure sensor Oil puressure sensor for load meter (Load meter specification)....282
		Function..................................................................................282
		Steering oil pressure sensor..............................................................283
		(Machines equipped emergency steering)....................................................283
		Emergency steering oil pressure sensor....................................................283
		(Machines equipped emergency steering)....................................................283
		Function..................................................................................283
		HST filter clogging sensor................................................................283
		Function..................................................................................283
		COOLANT LEVEL SENSOR......................................................................284
		Function..................................................................................284
		Engine oil level sensor...................................................................285
		Function..................................................................................285
		Air cleaner clogging sensor...............................................................285
		Function..................................................................................285
		Lift arm angle sensor (Load meter specification) (If equipped)............................286
		Function..................................................................................286
	STANDARD VALUE TABLE FOR engine...............................................................288
	STANDARD VALUE TABLE FOR CHASSIS..............................................................289
20 TESTING AND ADJUSTING..........................................................................287
	Tools for testing, adjusting, and troubleshooting.............................................294
	Measuring engine speed........................................................................296
	Measuring exhaust gas color...................................................................297
	Adjusting valve clearance.....................................................................299
	Measuring compression pressure................................................................300
	Measuring blow-by pressure....................................................................301
	Testing and adjusting fuel injection timing...................................................302
	Measuring engine oil pressure.................................................................303
	Measuring, testing operating force of accelerator pedal.......................................304
	Adjusting engine stop solenoid................................................................306
	Adjusting engine speed sensor.................................................................307
	Testing and adjusting air conditioner compressor belt tension.................................307
	Measuring directional lever...................................................................308
	Testing and adjusting HST oil pressure........................................................308
	Measuring clutch control pressure.............................................................313
	Testing and adjusting steering wheel..........................................................314
	Testing and adjusting steering oil pressure...................................................315
	Bleeding air from steering circuit............................................................316
	Testing hydraulic fan.........................................................................317
	Measuring brake pedal.........................................................................318
	Testing and adjusting brake pedal linkage.....................................................319
	Measuring brake oil pressure..................................................................322
	Bleeding air from brake circuit...............................................................325
	Measuring parking brake performance...........................................................326
	Measuring and adjusting work equipment control lever..........................................328
	Testing and adjusting work equipment hydraulic pressure.......................................329
	Testing and adjusting work equipment PPC oil pressure.........................................330
	Bleeding air..................................................................................332
	Releasing remaining pressure in hydraulic circuit.............................................333
	Testing and adjusting bucket positioner.......................................................333
	Testing and adjusting of boom kick-out........................................................335
	Checking proximity switch actuation display lamp..............................................336
	Special functions of machine monitor..........................................................338
	Pm CLINIC INSPECTION CHART....................................................................371
	TESTING AND ADJUSTING.........................................................................293
	Points to remember when troubleshooting.......................................................374
	Sequence of events in troubleshooting.........................................................375
	Precautions when carrying out maintenance.....................................................376
	Check before troubleshooting..................................................................384
	Categories, procedure, and method of using troubleshooting charts.............................385
	Phenomena considered to be failures and troubleshooting no....................................386
	Connection table for connector pin numbers....................................................389
	T-adapter table...............................................................................410
	Connector types and mounting locat............................................................413
	ions..........................................................................................413
	Connector layout drawing......................................................................420
	TROUBLESHOOTING...............................................................................373
	Before troubleshooting code display...........................................................426
	Before troubleshooting electrical system......................................................428
	Information contained in troubuleshooting table...............................................429
	TROUBLESHOOTING OF HST CONTROLLER SYSTEM (HST MODE)...........................................425
	Before troubleshooting code display...........................................................460
	Before troubleshooting electrical system......................................................462
	Information contained in troubuleshooting table...............................................463
	TROUBLESHOOTING OF monitor SYSTEM (mon MODE)..................................................457
	Before troubleshooting electrical system......................................................598
	Information contained in troubuleshooting table...............................................599
	TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE).................................................597
	Method of using troubleshooting chart.........................................................680
	Failure code and cause table..................................................................682
	TROUBLESHOOTING OF HYDRAULIC, MECHANICAL SYSTEM (H MODE)......................................679
	Method of using troubleshooting charts........................................................704
	TROUBLESHOOTING OF ENGINE (S MODE)............................................................703
	How to read this manual.......................................................................728
		Removal and installation of assemblies....................................................728
		Disassembly and assembly of assemblies....................................................729
	Precautions when carrying out operation.......................................................730
	Special tool list.............................................................................732
	Sketch of special tools.......................................................................735
	Removal, installation of fuel injection pump assembly.........................................740
		Special tools.............................................................................740
		Removal...................................................................................740
		Installation..............................................................................742
	Removal, installation of nozzle holder assembly...............................................744
		Special tools.............................................................................744
		Removal...................................................................................744
		Installation..............................................................................745
	Removal, installation of cylinder head assembly...............................................746
		Special tools.............................................................................746
		Removal...................................................................................746
		Installation..............................................................................751
	Removal, installation of engine assembly......................................................754
		Removal...................................................................................754
		Installation..............................................................................759
	Removal, installation of radiator assembly....................................................761
		Removal...................................................................................761
		Installation..............................................................................761
	Removal, installation of air aftercooler......................................................762
		Removal...................................................................................762
		Installation..............................................................................763
	Removal, installation of hydraulic oil cooler assembly........................................764
		Removal...................................................................................764
		Installation..............................................................................765
	Removal, installation of cooling fan and fan motor assembly...................................766
		Removal...................................................................................766
		Installation..............................................................................767
	Removal, installation of fuel tank assembly...................................................768
		Removal...................................................................................768
		Installation..............................................................................769
	Removal, installation of transfer.............................................................770
		Removal...................................................................................770
		Installation..............................................................................771
	Disassembly, assembly of transfer assembly....................................................772
		Special tools.............................................................................772
		Disassembly...............................................................................772
		Assembly..................................................................................780
	Removal, installation of parking brake assembly...............................................792
		Removal...................................................................................792
		Installation..............................................................................793
	Disassembly, assembly of parking brake assembly...............................................794
		Special tools.............................................................................794
		Disassembly...............................................................................794
		Assembly..................................................................................796
	Removal, installation of front axle assembly..................................................799
		Removal...................................................................................799
		Installation..............................................................................800
	Removal, installation of rear axle assembly...................................................801
		Removal...................................................................................801
		Installation..............................................................................803
	Disassembly, assembly of axle housing assembly................................................804
		Special tools.............................................................................804
		Disassembly...............................................................................804
		Assembly..................................................................................809
	Disassembly, assembly of differential assembly................................................817
		Special tools.............................................................................817
		Assembly..................................................................................826
	Removal, installation of HST pump and 4-gear pump assembly....................................841
		Removal...................................................................................841
		Installation..............................................................................843
	Removal, installation of HST motor 1 assembly.................................................844
		Removal...................................................................................844
		Installation..............................................................................845
	Removal, installation of HST motor 2 assembly.................................................846
		Removal...................................................................................846
		Installation..............................................................................847
	Removal, installation of work equipment control valve assembly................................848
		Removal...................................................................................848
		Installation..............................................................................849
	Removal, installation of travel damper valve assembly.........................................850
		Removal...................................................................................850
		Installation..............................................................................851
	Removal, installation of hydraulic tank assembly..............................................852
		Removal...................................................................................852
		Installation..............................................................................853
	Removal, installation of work equipment assembly..............................................854
		Removal...................................................................................854
		Installation..............................................................................857
	Disassembly and assembly of HST pump assembly.................................................861
		Special tools list........................................................................861
		Disassembly...............................................................................861
		Assembly..................................................................................870
	Disassembly and assembly of HST motor assembly................................................888
		Special tools list........................................................................888
		Disassembly...............................................................................888
		Assembly..................................................................................897
	Disassembly, assembly of hydraulic cylinder assembly..........................................904
		Special tools.............................................................................904
		Disassembly...............................................................................904
		Assembly..................................................................................907
	Removal, installation of operator's cab assembly..............................................911
		Special tools.............................................................................911
		Removal...................................................................................911
		Installation..............................................................................915
	Removal, installation of operator's cab glass (Stuckglass)...................................917
		Special tools.............................................................................917
		Removal...................................................................................917
		Installation..............................................................................918
		Coating materials.........................................................................924
	Removal, installation of center hinge pin.....................................................925
		Special tools.............................................................................925
		Removal...................................................................................925
		Installation..............................................................................930
	Removal, installation of counterweight........................................................936
		Removal...................................................................................936
		Installation..............................................................................937
	Removal, installation of air conditioner unit assembly........................................938
		Special tools.............................................................................938
		Removal...................................................................................938
		Installation..............................................................................940
	Removal, installation of air conditioner compressor assembly..................................941
		Special tools.............................................................................941
		Removal...................................................................................941
		Installation..............................................................................941
	Removal, installation of monitor panel........................................................942
		Removal...................................................................................942
		Installation..............................................................................945
30 DISASSEMBLY AND ASSEMBLY.......................................................................727
90 OTHERS.........................................................................................947

KOMATSU WA320-5H WHEEL LOADER SHOP MANUAL (H50051 AND UP) – PDF DOWNLOAD:

IMAGES PREVIEW OF THE MANUAL:

PLEASE NOTE:

  • This is not a physical manual but a digital manual – meaning no physical copy will be couriered to you. The manual can be yours in the next 2 mins as once you make the payment, you will be directed to the download page IMMEDIATELY.
  • This is the same manual used by the dealers inorder to diagnose your vehicle of its faults.
  • Require some other service manual or have any queries: please WRITE to us at [email protected]

2 reviews for Komatsu WA320-5H Wheel Loader Shop Manual (H50051 and up) – PDF DOWNLOAD

  1. 5 out of 5

    Archie Timothy

  2. 5 out of 5

    Sterling Pedro

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