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37 - 3

Section D Controls

9803/3280

Section D

37 - 3

Issue 1

Precision Control (Servo)

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

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jcb 215 Service Manual

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