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jcb JS70 Service Manual
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3 - 4
Section C
Electrics
9803/6020
Section C
3 - 4
Issue 1
Cab Layout
283690
Left Console
1
Control Lock Lever
Raising lever
1
provides a method of isolating the
hydraulic controls (in addition to operating the
Servo
Isolator Switch
(paragraph 5)) and is an integral part
of the procedur
e for vacating the cab. Lower the lever
to activate the hydraulic controls.
JS08140
P
00009
2
H
1
10
1
6
2
3
4
5
7
1
68
70
Table of Contents
Section 1 General Information Section 1
3
Table of Contents
3
Bolt and Nut Torque Specifications
4
General Torque Settings
5
Service Tools
6
Section C - Electrics
6
Section E - Hydraulics
7
Sealing and Retaining Compounds
13
Section 3 Routine Maintenance Section 3
20
Fluids and Lubricants
22
Lubricants - Health and Safety
23
Service Intervals for Hydraulic Oil and Filters When Using a Breaker
24
Service Schedules
24
Initial Precautions for New Machine Usage
25
Greasing
29
Slew Ring Bearing
29
Slew Ring Teeth and Slew Pinion
29
Excavator End (Standard Boom)
30
Excavator End (Offset Boom)
31
Battery
32
Air Bleeding Procedures
33
Checking the Fluid Level
33
Hydraulics
33
Releasing Tank Pressure
33
Topping up Fluid Level
33
Changing the Fluid
36
Changing the Return Filter Element
37
Cleaning/Changing the Suction Strainer
37
Changing the Nephron Filter
38
Changing the Air Breather Element
39
Draining Tank Impurities
39
Changing the Servo Oil Filter
40
Changing the Breaker In-Line Filter (if Fitted)
41
Changing the Track Gearbox Oil
42
Checking Track Gearbox Oil Level
42
Transmission
42
Replenishing Slew Gearbox Grease
43
Cleaning the Tracks
44
Tracks and Running Gear
44
Checking/Adjusting the Track Tension
45
Checking the Rollers and Idler Wheels for Oil Leaks
46
Checking the Track Shoes
46
Section C Electrics Section C
60
Torque Specification
61
Technical Data
62
Battery Testing
63
Schematic Diagram
64
Right Console
67
Left Console
69
Display Monitor
71
Control, Function, Operation
73
Electrical Equipment Layout
74
Cab Relays
75
Basic Operation of Engine Control
76
Engine Control
76
One Touch Idle Control
78
Speed Control for each Mode
79
Emergency Stop
80
Swing Brake/Swing Lock
82
High Travel
85
Lever Lock
87
Power Supply Cut Delay
88
Transistor Protection
89
Monitor Display
90
Throttle Control Assembly Adjustment
92
Section E Hydraulics Section E
94
Precautions During Use
95
Technical Data
95
Schematic Hydraulic Circuit
98
Travel - High Speed
100
Travel - Low Speed
102
Linear Travel
104
Swing Operation (0% Swing Brake)
106
Swing - no Swing Operation (50% Swing Brake)
108
Swing Lock Operation (100% Swing Brake)
110
Swing Brake Operation
112
Swing and Dipper in Simultaneous Operation
115
Swing Over-Run Prevention Operation
116
Swing Reduction Gear Oil Recycling
117
Attachment Boom up
118
Attachment Boom down
120
Attachment - Dipper out
122
Attachment - Dipper in
124
Attachment - Bucket Open
126
Attachment - Bucket Close
127
Attachment - Blade up
128
Attachment - Blade down
129
Quick Heat Circuit
130
Pilot Control Line
131
Hydraulic Pump
132
Pressure Testing
136
Fault Finding
163
Control Valve
168
Operation
169
Operation
173
Dismantling and Assembly
186
Maintenance Specifications
215
Fault Finding
220
Dismantling and Assembly
221
Fault Finding
255
Section F Transmission Section F
288
Operation
289
Fault Finding
294
Removal and Replacement
297
Motor Bleeding
301
Testing
302
Cross-Sectional View
303
Component List
306
Dismantling
307
Section J Track and Running Gear Section J
349
Idler Wheel and Recoil Unit
358
Removal
358
Removal and Replacement
358
Replacement
359
Dismantling and Assembly
360
Idler Wheel
360
Dismantling
361
Assembly
362
Dismantling
365
Recoil Unit
365
Assembly
366
Assembly
367
Dismantling
367
Grease Cylinder
367
Drive Sprocket
368
Removal
368
Replacement
369
Removal
370
Top Roller
370
Replacement
371
Dismantling
373
Assembly
374
Bottom Roller
377
Removal
377
Replacement
378
Dismantling
380
Assembly
381
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jcb JS70 Specifications
General
Brand
jcb
Model
JS70
Category
Excavators
Language
English
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