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JZ 70
jcb JZ 70 User Manual
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A356830
M
A1
C1
A2
A3
A4
C2
A5
A6
B1
S1
S2
B2
B3
B4
B5
B6
B1
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P
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D
Au
Mu
B
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a1
b1
A2
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B
T
P
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PV
D
C
PI2
EC
A1
B2
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173
175
Table of Contents
Contents
1
Introduction
2
General Information
3
Bolt and Nut Torque Specifications
4
General Torque Settings
5
Service Tools
6
Body and Framework
6
Electrics
9
Hydraulics
10
Sealing and Retaining Compounds
13
Care and Safety
14
Safety Notices
15
General Safety
16
Operating Safety
17
Maintenance Safety
18
Routine Maintenance
20
Fluids and Lubricants
22
Lubricants - Health and Safety
23
Service Schedules
24
Service Intervals for Hydraulic Oil and Filters when using a Breaker
24
Operating Hours Schedule
25
Greasing
28
Slew Ring Teeth and Slew Pinion
28
Slew Ring Bearing
28
Excavator End (Standard Boom)
29
Excavator End (Offset Boom)
30
Battery
31
Hydraulics
33
Air Bleeding Procedures
33
Bleeding Air from the Hydraulic Pump
33
Bleeding Air from the Slew Motor
34
Bleeding air from the Rams
34
Checking the Fluid Level
35
Releasing Tank Pressure
35
Topping up Fluid Level
35
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
Transmission
42
Slew Gearbox Grease
42
Checking Track Gearbox Oil Level
42
Changing the Track Gearbox Oil
42
Tracks and Running Gear
43
Cleaning the Tracks
43
Checking/Adjusting the Track Tension
44
Checking the Track Shoes
45
Checking the Rollers and Idler Wheels for Oil Leaks
45
Engine
46
Changing the Air Filter Elements
46
Checking the Oil Level
48
Changing the Oil and Filter
48
Checking the Coolant Level
49
Coolant Mixtures
49
Changing the Coolant
50
Cleaning the Radiator and Oil Cooler
50
Checking the Fan Belt Tension
51
Fitting a New Fan Belt
51
Draining Fuel Tank Impurities
52
Draining the Water Separator
52
Cleaning the Water Separator
52
Changing the Fuel Filter Element
53
Cleaning the Lift Pump Strainer
53
Bleeding the Fuel System
54
Component Locations
55
Body and Framework
56
Cab
58
Direct Glazing
58
Air Conditioning (Optional)
64
Operation
64
Control
67
Safety Procedures
67
Fault Finding
68
Checking Refrigerant Charge Level
70
Leak Testing
70
Tightening Leaking Hoses
70
System Diagnosis
71
Electrics
76
Technical Data
78
Battery Testing
79
Schematic Diagram
80
Harnesses
82
Layout
83
Operator's Cab
83
Right Console
84
Left Console
86
Monitor Panel
87
Relays
91
EMS System
92
System Overview
92
Introduction
92
Circuit Concepts
93
Pulse Width Modulation (PWM)
95
Testing of EMS Imputs and Outputs
96
Functional Description
97
Circuit Symbols
97
Throttle Control System
98
Throttle Control Circuit
98
Engine Throttle Control
99
Engine Throttle Control for Each Mode
101
One Touch Idle
102
Fuel Level Sensor Warning
103
Engine Temperature Sensor/Warning
104
Hydraulic Temperature Sensor/Warning
105
Engine Oil Pressure Warning
106
Pre Heat Warning
107
Service Required Warning
108
No Charge Warning
110
Servo Isolator/Lever Lock Warning
111
Swing Brake
112
Swing Lock (100% Swing Brake)
113
High Speed Travel
114
Offset Boom (When Fitted)
115
Engine Throttle Control Calibration
116
EMS Monitor Socket
118
EMS Set Menu
119
EMS Set + Mode (5 secs)
120
Set + Mode (20 secs)
121
Electrical Schematics
123
List of Circuits
123
Component Identification
124
Mating Face Connector Views
125
1 - Alternator Charging and Battery Relay
130
2 - Engine Throttle Control
130
3 - Engine One Touch Idle
132
4 - Engine Start/Stop
132
5 - Engine Pre Heat
134
6 - Lever Lock and Isolator
134
7 - Wiper
136
8 - Washer
136
9 - Horn
138
10 - Travel Alarm
138
11 - Swing Brake
140
12 - Swing Lock
140
13 - High Speed Travel
142
14 - Work Lamps
142
15 - Fuel Sensor
144
16 - Engine Temperature
144
17 - Hydraulic Temperature
146
18 - Quickhitch (Optional)
146
19 - Beacon
148
20 - Low Flow (Grab Rotate/Weedcutter)
148
21 - Hammer
150
22 - Warning Indicator Lamps
150
23 - Heater
152
24 - Air Conditioning
152
25 - Refuelling Pump
152
26 - Radio
155
27 - Cigar Lighter
154
28 - Cab Interior Lamp
154
29 - Swing/Offset
157
30 - EMS/Power Supply Network
157
31 - Diagnostics Socket
159
Hydraulics
158
Schematics
160
Schematics Hydraulic Circuit
160
Spool in Neutral
162
Single Spool Operation (Arm/Boom/Bucket/Offset)
164
Two Spool Operation - Multi Functioning
166
Travel Operation
168
100% Swing Brake
170
50% Swing Brake
172
Swing Operation
174
Cross Line Relief Valve
176
Swing Reduction Gear Oil Recycling
177
Dozer Operation
178
JZ 70 Pump Theory
180
Anti Cavitation
182
Pressure Testing
183
Fault Finding
184
Hydraulic Pump
187
Dismantling and Assembly
187
Machine Valve Location
202
Remote Control Valve (Services)
203
Introduction
203
Operation
205
Dismantling and Assembly
206
Maintenance Specifications
209
Control Valve
210
Precautions During Use
210
Dismantling and Assembly
211
Pilot Supply Valve
213
Operation
213
Dismantling and Assembly
214
Pilot Line System
215
Hydraulic Rams
216
Precautions During Use
216
Bucket Ram Removal and Replacement
217
Dipper Ram Removal and Replacement
221
Boom Ram Removal and Replacement
226
Offset Boom Ram Removal and Replacement
230
Blade Ram Removal and Replacement
234
Ram Piston Head Nut - Removal and Fitting
238
Torque Specifications
241
Rotary Coupling
242
Description
242
Operation
243
Removal and Replacement
245
Dismantling and Assembly
245
Slew Motor
246
Hydraulic Motor Components
246
Reduction Gear Components
247
Hydraulic Circuit
248
Operation
249
Maintenance Specifications
250
Motor Assembly/Cylinder Assembly
251
Dismantling and Assembly
251
Fault Finding
262
Transmission
264
Traction Motor/Reduction Gear
265
Operation
265
Fault Finding
267
Removal and Replacement
270
Motor Bleeding
274
Testing
275
Track Gearbox
276
Dismantling and Assembly
276
Track Motor
292
Dismantling and Assembly
292
Service Tools
321
Track and Running Gear
329
Tracks
331
Removal and Replacement
331
Replacing the Shoe Plate
335
Replacing the Track Link
336
Changing from Steel to Rubber Tracks
339
Changing from Rubber to Steel Tracks
339
Idler Wheel and Recoil Unit
340
Removal
340
Replacement
341
Idler Wheel
342
Dismantling
342
Assembly
344
Recoil Unit
347
Dismantling
347
Assembly
348
Drive Sprocket
349
Removal
349
Replacement
350
Top Roller
351
Removal
351
Replacement
352
Dismantling
353
Assembly
354
Bottom Roller
355
Removal
355
Replacement
356
Dismantling
357
Assembly
358
Engine
358
Technical Data
358
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jcb JZ 70 Specifications
General
Brand
jcb
Model
JZ 70
Category
Excavators
Language
English
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