JCB JZ70 Tracked Excavator Repair Service Manual

(S/N: 834000 Onwards)
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This service manual PDF download for the JZ70 JCB Tracked Excavator 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 fully at every opportunity.


APPLICABLE MODELS :

JCB Tracked Excavator JZ70
from machine no. 834000


TABLE OF CONTENTS :

General Information
Care & Safety
Routine Maintenance
Attachments
Body & Framework
Electrics
Controls
Hydraulics
Transmission
Track & Running Gear
Engine


MANUAL SPECIFICATION :

File Format : PDF
Language : English
Printable : Yes
Searchable : Yes
Bookmarked : Yes
Publication No. : 9803/6030 Issue 0
Total Pages : 360


This JCB Hydraulic Excavator service manual / repair manual / workshop manual PDF download contains specs, diagrams, actual real photo illustrations, and schemes. In addition to space savings, nice thing about having completly searcheble PDF files instead of a hard-printed manual is that you can use the Search feature in your PDF reader software (Adobe Acrobat) to find just what your looking for and just print out the exact pages you need or all manual easily. This is the same manual your local dealer will use when doing a repair. This is a must for the Do-It-Yourselfer! Saving Yourself $$$$$$ In Service Repair And Maintenance Costs !!!!

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Cover
Contents
Introduction

General Information
Bolt and Nut Torque Specifications
General Torque Settings
Service Tools
Body and Framework
Electrics
Hydraulics
Sealing and Retaining Compounds

Care and Safety
Safety Notices
General Safety
Operating Safety
Maintenance Safety

Routine Maintenance
Fluids and Lubricants
Lubricants - Health and Safety
Service Schedules
Service Intervals for Hydraulic Oil and Filters when using a Breaker
Operating Hours Schedule
Greasing
Slew Ring Teeth and Slew Pinion
Slew Ring Bearing
Excavator End (Standard Boom)
Excavator End (Offset Boom)
Battery
Hydraulics
Air Bleeding Procedures
Bleeding Air from the Hydraulic Pump
Bleeding Air from the Slew Motor
Bleeding air from the Rams
Checking the Fluid Level
Releasing Tank Pressure
Topping up Fluid Level
Changing the Fluid
Changing the Return Filter Element
Cleaning/Changing the Suction Strainer
Changing the Nephron Filter
Changing the Air Breather Element
Draining Tank Impurities
Changing the Servo Oil Filter
Changing the Breaker In-Line Filter (if Fitted)
Transmission
Slew Gearbox Grease
Checking Track Gearbox Oil Level
Changing the Track Gearbox Oil
Tracks and Running Gear
Cleaning the Tracks
Checking/Adjusting the Track Tension
Checking the Track Shoes
Checking the Rollers and Idler Wheels for Oil Leaks
Engine
Changing the Air Filter Elements
Checking the Oil Level
Changing the Oil and Filter
Checking the Coolant Level
Coolant Mixtures
Changing the Coolant
Cleaning the Radiator and Oil Cooler
Checking the Fan Belt Tension
Fitting a New Fan Belt
Draining Fuel Tank Impurities
Draining the Water Separator
Cleaning the Water Separator
Changing the Fuel Filter Element
Cleaning the Lift Pump Strainer
Bleeding the Fuel System
Component Locations

Body and Framework
Cab
Direct Glazing
Air Conditioning (Optional)
Operation
Control
Safety Procedures
Fault Finding
Checking Refrigerant Charge Level
Leak Testing
Tightening Leaking Hoses
System Diagnosis

Electrics
Technical Data
Battery Testing
Schematic Diagram
Harnesses
Layout
Operator's Cab
Right Console
Left Console
Monitor Panel
Relays
EMS System
System Overview
Introduction
Circuit Concepts
Pulse Width Modulation (PWM)
Testing of EMS Imputs and Outputs
Functional Description
Circuit Symbols
Throttle Control System
Throttle Control Circuit
Engine Throttle Control
Engine Throttle Control for Each Mode
One Touch Idle
Fuel Level Sensor Warning
Engine Temperature Sensor/Warning
Hydraulic Temperature Sensor/Warning
Engine Oil Pressure Warning
Pre Heat Warning
Service Required Warning
No Charge Warning
Servo Isolator/Lever Lock Warning
Swing Brake
Swing Lock (100% Swing Brake)
High Speed Travel
Offset Boom (When Fitted)
Engine Throttle Control Calibration
EMS Monitor Socket
EMS Set Menu
EMS Set + Mode (5 secs)
Set + Mode (20 secs)
Electrical Schematics
List of Circuits
Component Identification
Mating Face Connector Views
1 - Alternator Charging and Battery Relay
2 - Engine Throttle Control
3 - Engine One Touch Idle
4 - Engine Start/Stop
5 - Engine Pre Heat
6 - Lever Lock and Isolator
7 - Wiper
8 - Washer
9 - Horn
10 - Travel Alarm
11 - Swing Brake
12 - Swing Lock
13 - High Speed Travel
14 - Work Lamps
15 - Fuel Sensor
16 - Engine Temperature
17 - Hydraulic Temperature
18 - Quickhitch (Optional)
19 - Beacon
20 - Low Flow (Grab Rotate/Weedcutter)
21 - Hammer
22 - Warning Indicator Lamps
23 - Heater
24 - Air Conditioning
25 - Refuelling Pump
26 - Radio
27 - Cigar Lighter
28 - Cab Interior Lamp
29 - Swing/Offset
30 - EMS/Power Supply Network
31 - Diagnostics Socket

Hydraulics
Schematics
Schematics Hydraulic Circuit
Spool in Neutral
Single Spool Operation (Arm/Boom/Bucket/Offset)
Two Spool Operation - Multi Functioning
Travel Operation
100% Swing Brake
50% Swing Brake
Swing Operation
Cross Line Relief Valve
Swing Reduction Gear Oil Recycling
Dozer Operation
JZ 70 Pump Theory
Anti Cavitation
Pressure Testing
Fault Finding
Hydraulic Pump
Dismantling and Assembly
Machine Valve Location
Remote Control Valve (Services)
Introduction
Operation
Dismantling and Assembly
Maintenance Specifications
Control Valve
Precautions During Use
Dismantling and Assembly
Pilot Supply Valve
Operation
Dismantling and Assembly
Pilot Line System
Hydraulic Rams
Precautions During Use
Bucket Ram Removal and Replacement
Dipper Ram Removal and Replacement
Boom Ram Removal and Replacement
Offset Boom Ram Removal and Replacement
Blade Ram Removal and Replacement
Ram Piston Head Nut - Removal and Fitting
Torque Specifications
Rotary Coupling
Description
Operation
Removal and Replacement
Dismantling and Assembly
Slew Motor
Hydraulic Motor Components
Reduction Gear Components
Hydraulic Circuit
Operation
Maintenance Specifications
Motor Assembly/Cylinder Assembly
Dismantling and Assembly
Fault Finding

Transmission
Traction Motor/Reduction Gear
Operation
Fault Finding
Removal and Replacement
Motor Bleeding
Testing
Track Gearbox
Dismantling and Assembly
Track Motor
Dismantling and Assembly
Service Tools

Track and Running Gear
Tracks
Removal and Replacement
Replacing the Shoe Plate
Replacing the Track Link
Changing from Steel to Rubber Tracks
Changing from Rubber to Steel Tracks
Idler Wheel and Recoil Unit
Removal
Replacement
Idler Wheel
Dismantling
Assembly
Recoil Unit
Dismantling
Assembly
Drive Sprocket
Removal
Replacement
Top Roller
Removal
Replacement
Dismantling
Assembly
Bottom Roller
Removal
Replacement
Dismantling
Assembly

Engine
Technical Data

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