PROBLEM 25
Accessory pin cylinder(s) will not extend or retract.
CHECKS
Does system pressurize to 3,000 psi (207 bar) when moving problem switch to extend or
retract position?
POSSIBLE CAUSES
Faulty control valve section; low pump pressure; bad pump; switch failure;
mechanical problem.
Yes No
Are mechanical problems present at
pin cylinders?
Yes No
When moving problem switch, does accessory system pressure
increase?
Voltage
No Voltage
Yes No
Check pin operation.
Check for 24 volts at problem pin switch.
Replace cylinder or
consult dealer/factory.
Repair
problem.
Are solenoids magnetized when switch position is enabled?
Yes No
Replace power switch.
Replace solenoid valve/wiring.
Check system pressure for 3,000 psi (207 bar).
Pressure Ok Pressure not Ok
Repair or replace
control valve.
Check accessory pump pressure output.
Repair or replace pump, if necessary.
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