Komatsu WA900-3E0 Wheel Loader Shop Manual SEN05654-01 PDF

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Komatsu WA900-3E0 Wheel Loader Shop Manual SEN05654-01 – PDF DOWNLOAD

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Komatsu WA900-3E0 Wheel Loader Shop Manual SEN05654-01 – PDF DOWNLOAD 

Language : English
Pages : 173
Downloadable : Yes
File Type : PDF

IMAGES PREVIEW OF THE MANUAL:

TABLE OF CONTENTS:

Komatsu WA900-3E0 Wheel Loader Shop Manual SEN05654-01 – PDF DOWNLOAD 

SERIAL NUMBERS 60079 and up

COVER 1
Notice of revision 3
00 Index and foreword 5
Table of Contents 6
Table of Contents 6
Foreword 10
Before reading this manual 10
01 Specification 11
Specification 13
Specification dimension drawing 13
Specifications 14
Weight table 17
Table of fuel, coolant and lubricants 19
10 Structure and function 23
Cooling system and related devices 25
Cooling system 25
Hydraulic system 27
Power ladder system 27
Electrical system 32
Power ladder controller 32
Rear view monitor system 41
Engine service monitor system 44
Parking brake circuit 46
Sensor 48
20 Standard value table 51
Standard value table 53
Standard value table for chassis 53
Standard value table for electrical system 54
30 Testing and adjusting 55
Testing and adjusting 57
Inspection and adjustment of potentiometer 57
Ladder position calibration procedure 58
Procedure for testing diodes 60
40 Troubleshooting 61
General information on troubleshooting 64
Classification and procedures of troubleshooting 64
Failure codes table 65
Fuse locations 67
Troubleshooting by failure code 69
Failure code [D1EMKA] (Disconnection of parking brake interlock relay) 69
Failure code [D1EMKB] (Ground fault of parking brake interlock relay) 71
Failure code [D1EMKY] (Hot short of parking brake interlock relay) 72
Failure code [D1EPKA] (Disconnection of ladder drive pump relay) 73
Failure code [D1EPKB] (Ground fault of ladder drive pump relay) 74
Failure code [D1EPKY] (Short circuit of ladder drive pump relay) 75
Failure code [D1EQKY] (Ladder operation alarm relay output hot short circuit) 76
Failure code [D1EQKZ] (Ladder operation alarm relay output abnormality:Open circuit, ground fault) 77
Failure code [D1ERKB] (Ladder raise solenoid output ground fault) 78
Failure code [D1ERKZ] (Ladder raise solenoid output abnormality: Open circuit, hot short circuit) 79
Failure code [D1ESKB] (Ladder lower solenoid output ground fault) 80
Failure code [D1ESKZ] (Ladder lower solenoid output abnormality: Open circuit, hot short circuit) 81
Failure code [DBL0KR] (Power ladder controller CAN-NET signal line open circuit) 82
Failure code [DBL0KT] (Non-volatile memory write error) 86
Failure code [DBL1KK] (Power Low Error: Battery direct) 87
Failure code [DBL2KK] (Solenoid Power Low Error) 89
Failure code [DDB6KZ] (Parking brake system abnormality) 91
Failure code [DDDGKY] (Ladder operation switch hot short circuit) 93
Failure code [DDDKKY] (Ladder raise operation switch hot short circuit)40-35 95
Failure code [DDDLKY] (Ladder lower operation switch hot short circuit)40-38 98
Failure code [DK5VKX] (Ladder angle sensor abnormality: Out of range) 101
Failure code [DK5VMA] (Power ladder system abnormality) 103
Failure code [DUM9KY] (Ladder indicator output hot short circuit) 106
Failure code [DUM9KZ] (Ladder indicator output abnormality: Open circuit, hot short circuit) 107
Failure code [DV00KY] (Ladder interlock caution output hot short circuit) 108
Failure code [DV00KZ] (Ladder interlock caution output abnormality: Open circuit, ground fault) 109
Failure code [DWNLKA] (Ladder cushion valve output open circuit) 110
Failure code [DWNLKB] (Ladder cushion valve output ground fault) 111
Failure code [DWNLKY] (Ladder cushion valve output hot short circuit) 112
Troubleshooting of electrical system (E-mode) 113
E-1 Power ladder does not operate 113
E-2 Brake oil temperature warning keeps lighting 116
E-3 Parking brake does not operate (as emergency brake) 118
E-4 Parking brake is applied while machine is traveling 122
E-5 Parking brake is released as starting switch is turned to ON position 125
Troubleshooting of hydraulic and mechanical system (H-mode) 127
H-1 Power ladder does not move or its speed is low 127
H-2 Fan of ADD cooler does not rotate 128
Troubleshooting of maintenance monitor system (K mode) 129
Maintenance monitor system 129
K-1 Hydraulic oil level gauge flashes 131
Troubleshooting for machine monitor (M-mode) 134
M-1 Rear view monitor does not operate 134
M-2 While clearance lamp is turned on, illuminance of rear view monitor remains dark 137
M-3 Rear view monitor does not work in reverse-interlock mode 138
M-4 Illuminance of rear view monitor cannot be adjusted 140
M-5 Optional controller error and real-time monitor sreen are not displayed on engine service monitor 142
M-6 Engine compartment lamp does not light up 144
M-7 Step lamp does not light up 147
90 Diagrams and drawings 149
Hydraulic circuit diagram 151
Symbols used in hydraulic circuit diagram 151
Power train hydraulic circuit diagram 155
Brake, power ladder and additional cooler Hydraulic circuit diagram 156
Work equipment hydraulic circuit diagram 157
Electrical circuit diagram 158
Symbols used in electric circuit diagram 158
Electrical circuit diagram 162
Connector arrangement diagram 164

S.V  21/12/24