37 - 3
Section D Controls
9803/3280
Section D
37 - 3
Issue 1
Precision Control (Servo)
NO
YES
NO
YES
YES
NO
YES
Is the pilot supply valve oil filter
blocked?
START
Is the pilot oil pressure low?
Are the joystick linkages worn? Check
the condition of the universal joints
and actuator plates on the pilot
control valves.
Adjust as required.
Repair or renew as applicable.
Renew filter. Remove any
contamination. Check condition of
hydraulic oil, drain and replace if
necessary.
Is the pilot supply valve operating
correctly? Remove the valve stem
and check for signs of
contamination or sticking.
A402370
See Pilot Control Valves, Dismantling,
Inspection and Assembly.
See Electrical Connections.
See Service Procedures, Testing the
Pilot Pressure.
See Section 3, Routine Maintenance.
Fault Finding
Chart B - All Backhoe Services Slow to Operate
www.WorkshopManuals.co.uk
Purchased from www.WorkshopManuals.co.uk
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