Piper Arrow IV Turbo Maintenance Manual page 331

CHART 2901. HYDRAULIC SYSTEM TROUBLESHOOTING (cont.)
Trouble
Pump stops during gear
retraction.
Pump stops during gear
extension.
Pump fails to shut off
though gear has fully
retracted.
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
Cause
Landing gear actuator
circuit breaker opens.
Landing gear selector
circuit breaker opens.
Pressure switch out of
adjustment.
Mechanical restriction or
obstruction in hydraulic
system to allow pressure to
build up and shut off pump
before gear has retracted.
Shuttle valve sticking in
pump base.
Landing gear actuator
circuit breaker opens.
Landing gear selector
circuit breaker opens.
Pressure switch inopera-
tive.
Pressure switch out of
adjustment.
Pump retraction solenoid
sticking (inboard solenoid).
2C4
Remedy
Reset circuit breaker and
determine cause for over-
load.
Reset circuit breaker and
determine cause for over-
load.
Remove and readjust or
replace switch.
Place airplane on jacks and
run retraction check.
Isolate and determine
cause.
Check cause.
Reset circuit breaker and
determine cause for over-
load.
Reset circuit breaker and
determine cause for over-
load.
Replace switch.
Replace switch.
Replace solenoid.
29-00-02
Page 29-10
December 1, 1978