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Section E
Hydraulics
9803/7130
Section E
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Issue 1
Contents Page No.
Service Tools 1 - 1
Technical Data
System Type 2 - 1
Hydraulic Pumps 2 - 1
Relief Valve Pressures 2 - 1
Smooth Ride System 2 - 2
Basic System Operation
Component Location 3 - 1
Neutral Circuit Description 3 - 2
Introduction to Hydraulic Schematic Symbols 3 - 5
Circuit Schematic 3 - 15
Circuit Descriptions
Hydraulic Pump Operation 4 - 1
Loader Valve
- Neutral Circuit 5 - 1
- Load Hold Check Valves - Operation 5 - 3
- Arms Lower 5 - 5
- Float 5 - 6
- Auxiliary Relief Valve (ARV) Operation 5 - 7
Main Relief Valve (MRV) Operation 6 - 1
Excavator Valve
- Neutral Circuit 7 - 1
- Load Hold Check Valves - Operation 7 - 3
- Bi - Restrictor Operation 7 - 5
- Slew Operation 7 - 5
- Slew ARV and Anti Cavitation Operation 7 - 7
- ARV Operation 7 - 7
Pilot Operated Pressure Relief Valve Operation 7 - 9
Hydraulic Rams Operation - End Damping 8 - 1
Smooth Ride System 10 - 1
Fault Finding
- Hydraulic System 15 - 1
- Smooth Ride System 15 - 5
Service Procedures
Hydraulic Contamination 20 - 1
Flow and Pressure Testing
- Hydraulic Pumps 21 - 1
Pressure Testing
- MRV 22 - 1
- ARV's 22 - 2
Quick Release Couplings
- Connecting & Disconnecting 23 - 1
Smooth Ride System
- Charging/Discharging the Accumulator 25 - 1
Main Pump
Removal and Replacement 30 - 1
Dismantling and Assembly 31 - 1
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