Piper Arrow IV Turbo Maintenance Manual page 328

CHART 2901. HYDRAULIC SYSTEM TROUBLESHOOTING
Trouble
Landing gear retraction
system fails to operate.
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.
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
Cause
Landing gear actuator
circuit breaker open.
Landing gear selector
circuit breaker open.
Landing gear actuator
circuit wires broken.
Landing gear selector
circuit wires broken.
Safety (squat) switch out
of adjustment.
Squat switch inoperative.
Pressure switch inopera-
tive.
Pump retraction solenoid
inoperative (inboard
solenoid).
—NOTE—
Gear selector switch
ground incomplete.
Gear selector switch
inoperative.
2C1
Remedy
Reset circuit breaker and
determine cause for open
circuit breaker.
Reset circuit breaker and
determine cause for open
circuit breaker.
Check wiring.
Check wiring.
Readjust switch. (Refer to
Adjustment of Safety
Switch, Chapter 32).
Replace switch.
Replace switch.
Replace solenoid.
Check ground.
Replace switch.
29-00-02
Page 29-07
December 1, 1978,