jcb 4CX Service Manual

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Section E
Hydraulics
9803/3280
Section E
2 - 10
Issue 3*
Technical Data
Relief Valve Pressures
Excavator Valve - Precision Control (Servo)
(Machines up to serial no. 931159)
Component Key:
1 Bucket
2 Dipper
3 Stabiliser
4 Stabiliser
5 Boom
6 Slew
7 Auxiliary relief valve
8 Tank port
9 Pilot operated check valve (hydraclamp)
10 Service ports
11 Load sense valve
12 Load sense drain regulator and relief valve
13 Inlet port
14 Hydraclamp solenoid
15 Auxiliary spool
bar kgf/cm
2
lbf/in
2
Boom Ram Head Side 248 - 255 253 - 260 3600 - 3700
Boom Ram Rod Side 345 - 352 351 - 358 5000 - 5100
Bucket Ram Head Side 248 - 255 253 - 260 3600 - 3700
Bucket Ram Rod Side 248 - 255 253 - 260 3600 - 3700
Dipper Ram Head Side 248 - 255 253 - 260 3600 - 3700
Dipper Ram Rod Side 248 - 255 253 - 260 3600 - 3700
Slew Left and Right 262 - 269 267 - 274 3800 - 3900
Load Sense Relief Valve † 208 - 212 213 - 216 3025 - 3075
Note: Instructions for pressure testing and adjustment are described in Service Procedures, Loader Valve - Pressure
Testing.
† Note: For pressure testing and adjustment of the load sense relief valve, see Service Procedures, Pressure Testing, Load
Sense Drain Regulator and Relief Valve.
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A402500
9
*
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Purchased from www.WorkshopManuals.co.uk

jcb 4CX Specifications

General

Brand	jcb
Model	4CX
Category	Compact Loader
Language	English