Piper Cherokee LANCE, Service Manual

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PIPER CHEROKEE SIX / LANCE SERVICE MANUAL
07/15/06 VA - HYDRAULIC SYSTEM
1K7
TABLE VA-IV. HYDRAULIC SYSTEM TROUBLESHOOTING
Trouble Cause Remedy
Landing gear retraction Landing gear actuator Reset circuit breaker
system fails to operate. circuit breaker open. and determine cause
for open circuit breaker.
Landing gear selector Reset circuit breaker
circuit breaker open. and determine cause for
open circuit breaker.
Landing gear actuator Check wiring.
circuit wires broken.
Landing gear selector Check wiring.
circuit wires broken.
Safety (squat) switch Readjust switch. (Refer to
out of adjustment. Adjustment of Safety
Switch, Section VIA.)
Squat switch inoperative. Replace switch.
Pressure switch Replace switch.
inoperative.
Pump retraction solenoid Replace solenoid.
inoperative (inboard solenoid).
NOTE: If the retracting solenoid of the pump can be heard to actuate when operating the gear
selector switch, it may be assumed that the gear control circuit is operating properly and the
actuator circuit should be further checked.
Gear selector switch Check ground.
ground incomplete.
Gear selector switch Replace switch.
inoperative.
Hydraulic pump ground Check ground.
incomplete.
Hydraulic pump inoperative. Replace or overhaul
pump.
Auxiliary extender Replace unit.
switch inoperative.
Hydraulic fluid in Fill reservoir with
reservoir below hydraulic fluid.
operating level.
Battery low or dead. Check condition of
battery.