Aichi SR18A / ISR60 SR18AJ / ISR60J SR21A / ISR70 SR21AJ / ISR70J SERVICE MANUAL SME- 125E – PDF DOWNLOAD
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Aichi SR18A / ISR60 SR18AJ / ISR60J SR21A / ISR70 SR21AJ / ISR70J SERVICE MANUAL SME- 125E – PDF DOWNLOAD
1. Inspection procedures
1. Check the anchor bolts and nuts for looseness, omission and any other damage.
a. Loose bolts should be removed and checked for damaged threads and deformation.
b. When re- installing anchor bolts or nuts, apply thread lock agent to the threads.
Recommended thread lock agent: Loctite 262.
c. Tighten anchor bolts by the specific tightening torque.
Specified tightening torque: 39 kg- m (282 ft- lbs)
NOTE:
In case it is hard to loosen anchor bolts due to lock agent, heat them up by using a
gas burner to melt the agent.
The heated or removed bolts and nuts should be replaced with new ones.
TABLE OF CONTENTS:
Aichi SR18A / ISR60 SR18AJ / ISR60J SR21A / ISR70 SR21AJ / ISR70J SERVICE MANUAL SME- 125E – PDF DOWNLOAD
Front pages 1
Introduction 2
Index 3
1 General information 8
Specifications SR18A 9
Specifications SR18AJ 10
Specifications SR21A 11
Specifications SR21AJ 12
Overall dimensions SR18A 13
Overall dimensions SR18AJ 14
Overall dimensions SR21A 15
Overall dimensions SR21AJ 16
Working range diagram SR18A 17
Working range diagram SR18AJ 18
Working range diagram SR21A 19
Working range diagram SR21AJ 20
Safety Devices 21
2 Mechanical section 22
Diesel engine 23
Hydraulic pump and Oil cooler installations 24
Rotation bearing 25
Boom rotation gearbox 27
Boom 28
1 Structures 28
2 Hydraulic hoses and electrical cables arrangements 28
3 Inspection procedures 29
4 Extension / Retraction wire ropes 31
5 Adjustment of extension / Retraction wire ropes 32
6 Tension on electrical cables 34
7 Sectional drawing 35
Fly-jib 37
Platform for SR18A and SR21A 38
Platform for SR18AJ and SR21AJ 39
3 Hydraulic section 40
Oil reservoir 41
Filter 42
Adaptor filter 43
Hydraulic pump 45
Emergency pump 46
Main control valve 47
Platform rotation solenoid valve 49
Platform, Fly-jib rotation solenoid valve 50
Unit valve 51
Swivel joint 52
Boom elevation cylinder 53
Single holding valve 54
Pilot check valve 56
Boom telescope cylinder 57
Double holding valve 58
Fly-jib cylinder 60
Double holding valve 61
Overload relief valve 62
Platform leveling system 63
Combonation valve 65
Lower leveling cylinder _without Fly-jib 66
Lower leveling cylinder _with Fly-jib 67
Upper leveling cylinder _without Fly-jib 68
Double holding valve 69
3-31_Upper leveling cylinder _with Fly-jib 70
Double pilot check valve 71
Boom rotation motor 72
Rotary actuator_ 73
Check valve block 76
Unloading solenoid valve 77
Generator solenoid valve 78
4 Electrical section 79
Main CPU box (M2D), Master 80
InputOutput characteristic (with Duplicated sensors) 81
InputOutput characteristic (without Duplicated sensors) 82
Error codes and countermeasures 83
Main CPU box (M2D), Slave_3290022600 85
Input Output characteristics 0
Upper control box (Double joystick controllers) 87
Upper control box (Single joystick controller) 89
Sub-CPU board (M4A) 91
Input, output characteristics (Double travewl joysticks) 92
Input, output characteristics (Single travewl joystick) 93
Joystick controller for Boom functions 94
Joystick controller for Travel functions (Double joystick controllers) 95
Joystick controller for Travel functions (Single joystick controller) 96
Foot switch 97
Lower control box 98
Main key switch 100
Relays in Lower control box 101
1 Relay CR-1 101
2 Relay CR-3,4,5,6,7 and 10 101
3 Relay CR-11 102
Engine control box 103
1 EGR cut controller 104
2 Timer relay 104
3 EGR cut relay (CR-22) 105
4 Safety relay 106
5 Charge relay 107
6 Relay CR-21 108
Boom length sensors 109
1 Boom length sensor (R/H) 110
2 Boom length sensor (L/H) 111
Boom angle sensor (R H) 112
Boom angle sensor (L H) 113
Boom length limit switches 114
Tilt sensors, Longitudinal and Lateral 115
Tilt angle 5 degrees 116
Accelerator motor 117
Fuel pump for automatic air bleeding system_Air cleaner detect switch 118
Low fuel level detect switch_Starter motor 119
Alternator 120
5 Electric circuit for Individual system 121
Engine start and stop system 122
Boom elevation system 123
Boom telescope system 124
Boom rotation system 125
Traveling system (Double joystick controllers) 126
Traveling system (Single joystick controller) 127
H/V control system 128
Platform rotation and Fly-jib articulation systems 129
Platform level adjust systems 130
Work range limit & Overload sensing systems (with Duplicated sensors) 131
Work range limit & Overload sensing systems (without Duplicated sensors) 132
Accelerator system 133
Emergency pump system 134
Horn, Work light, Hydraulic generatorp systems 135
Travel remote control system 136
6 Inspection and adjustment 137
Inspection procedures of Work radius 138
SR18A inspection data sheet 139
SR18AJ inspection data sheet 140
SR21A inspection data sheet 141
SR21AJ inspection data sheet 142
Engine rpm measurement procedures 143
Relief vavle pre-set pressure adjustment procedures 144
7 Appendix 149
Hydraulic circuit diagram 150
Electrical circuit diagram, Platform (Single joystick controller) 152
Electrical circuit diagram, Platform (Double joystick controllers) 153
Electric circuit diagram Turntable 154
7-08_Electrical wiring chart, Platform 156
Electric wiring chart, Turntable 157
Locations of Hydraulic and Electrical components 159
Water proof Connector 161
Color codes of wires 163
Tightening torque standard 164
8 Inspection manual 166
Procedures of Daily inspection 167
Daily inspection check sheet 169
Procedures of Periodical inspection 170
Procedures of Function test 174
Periodical inspection check sheet 175
Function test check sheet 177
9 Travel system (KOBELCO Shop manual) 178
1 Removing and Installing 180
1 1 Travel system 180
1 2 Crawler 180
1 3 Upper roller 185
1 4 Lower roller 195
1 5 Front idler 203
1 6 Sprocket 216
1 7 Travel motor 219
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