jcb 217 User Manual

47 - 3
Section D Controls
9803/3280
Section D
47 - 3
Issue 1
Precision Control (Servo)
YES
YES
NO
YES
START
Are the servo pressure isolation
valves operating correctly? Remove
the valve cartridges and check for
signs of contamination or sticking.
A405670
Adjust as required.
Refer to Service Procedures
- Testing the Servo Pressure.
Is the servo pressure low?
Clean and renew components as
applicable.
Refer to Servo Pressure Supply Valve
- Dismantling and Assembly.
YES
Are the joystick controls worn?
Check the condition of the universal
joint mechanism on the joystick
controllers.
Repair or renew as applicable.
Refer to Joystick Controllers -
Dismantling and Assembly.
NO
YES
Is the load sense relief valve out of
adjustment or defective?
Adjust, repair or renew as required.
Refer to Section E, Service
Procedures, Pressure Testing - Load
Sense Relief Valve.
Refer to Section E, Excavator Valve
- Dismantling and Assembly.
NO
Is the flushing valve piston in
the excavator valve inlet section
blocked open (return to tank)?
Clean and renew components as
applicable.
Refer to Section E, Excavator Valve
- Dismantling and Assembly.
YES
Does the engine remain under load
after the spools are returned to neutral?
Remove the flow regulator valve and
check for signs of contamination or
sticking. Check if the valve filter is
clogged.
Clean and renew components as
applicable.
Refer to Section E, Excavator Valve
- Dismantling and Assembly.
NO
NO
Fault Finding
Chart B - All Backhoe Services Slow to Operate
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jcb 217 Specifications

General

Brand	jcb
Model	217
Category	Other
Language	English