jcb 3CX Service Manual

ii
Section E Hydraulics
9803/3280
Section E
ii
Issue 4*
Contents Page No.
Loader Valve - Variable Flow
Operation 7 - 1
Priority Inlet Section Operation 7 - 2
Auxiliary Spool 7 - 4
Loader Shovel Spool 7 - 5
Loader Lift Spool 7 - 6
Shuttle Valve Signal Network 7 - 7
Excavator Valve
Manual Control
- Neutral Circuit 8 - 1
- Load Hold Check Valves Operation 8 - 3
- One Way Restrictor Operation 8 - 5
- Slew Operation 8 - 5
- Slew ARV and Anti Cavitation Operation 8 - 7
- Auxiliary Relief Valve (ARV) Operation 8 - 7
- Pilot Operated Pressure Relief Valve Operation 8 - 9
- Hydraclamp Valve Operation 8 - 11
Precision Control (Servo)
- Machines up to serial no. 931159 8 - 13
Hydraclamp Valve Operation 8 - 17
- Machines from January 2003 8 - 18
Smooth Ride System 10 - 1
Hose Burst Protection Valves (if fitted)
Boom & Dipper Operation 11 - 1
Loader Operation 11 - 5
Fault Finding
Hydraulic System
Fixed Flow 15 - 1
Variable Flow 15 - 10
Smooth Ride System 15 - 12
Service Procedures
Hydraulic Contamination 20 - 1
Fixed Flow Pumps
Flow and Pressure Testing 21 - 1
Variable Flow Pumps
Flow and Pressure Testing 22 - 1
Regulator Valve Adjustment 22 - 5
Renewing Drive Shaft Seal 22 - 7
Shuttle Valve Signal Network - Testing 22 - 8
Loader Valve - Pressure Testing
Main Relief Valve (MRV) 23 - 1
Unloader Valve 23 - 2
Hydraulic Speed Control (HSC) 23 - 3
Auxiliary Relief Valves (ARV's) 23 - 5
Excavator Valve - Pressure Testing
Auxiliary Relief Valves (ARV's) 23 - 9
Excavator Valve - Precision Control (Servo)
- Machines up to serial no. 931159
Pressure Testing -
Load Sense Drain Regulator and Relief Valve 23 - 10
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jcb 3CX Specifications

General

Brand	jcb
Model	3CX
Category	Compact Loader
Language	English