jcb 4CX Service Manual

47 - 4
Section D Controls
9803/3280
Section D
47 - 4
Issue 1
Precision Control (Servo)
YES
NO
YES
START
A405690
NO
Inspect the associated joystick
controller valve capsule for signs of
wear, damage or contamination.
Is the valve in good working order?
Clean and renew components as
applicable.
Refer to Joystick Controllers -
Dismantling and Assembly.
YES
Clean and renew components as
applicable.
Refer to Section E, Excavator Valve
- Dismantling and Assembly.
NO
Adjust, repair or renew as required.
Refer to Section E, Service
Procedures, Excavator Valve,
Pressure Testing - ARV's.
Refer to Section E, Excavator Valve
- Dismantling and Assembly.
Is the associated pressure
compensator blocked?
Test the pressure compensator network.
Refer also to Section E, Hydraulics
Fault Finding, 'One hydraulic service
fails or is slow to operate'.
NO
Will the service hold a load normally?
Inspect the associated load hold check
valves and the service spool for signs
of wear, damage or contamination.
Clean and renew components as
applicable.
Refer to Section E, Excavator Valve
- Dismantling and Assembly.
NO
Is the associated auxiliary relief valve
(ARV) out of adjustment or blocked
open (return to tank)?
Refer to Section E, Service Procedures,
Excavator Valve, Pressure Compensator
Network - Testing.
YES
Fault Finding
Chart C - One Backhoe Service fails or is Slow to Operate
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jcb 4CX Specifications

General

Brand	jcb
Model	4CX
Category	Compact Loader
Language	English