Piper Arrow IV Turbo Maintenance Manual page 330

CHART 2901. HYDRAULIC SYSTEM TROUBLESHOOTING (cont.)
Trouble
Landing gear extension
system fails to operate.
(cont.)
If the extension 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
Landing gear retraction
extremely slow.
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
Cause
Pump extension solenoid
inoperative (outboard
solenoid).
—NOTE—
Gear selector switch
ground incomplete.
Gear selector switch
inoperative.
Hydraulic pump ground
incomplete.
Hydraulic pump inopera-
tive.
Hydraulic fluid in reservoir
below operating level.
Low or dead battery.
Hydraulic fluid in reservoir
below operating level.
Restriction in hydraulic
lines.
Shuttle valve sticking in
pump base.
2C3
Remedy
Replace solenoid.
Check ground.
Replace switch.
Check ground.
Replace or overhaul pump.
Fill reservoir with
hydraulic fluid.
Check condition of battery.
Fill reservoir with hydraulic
fluid.
Isolate and check hydraulic
lines.
Check cause.
29-00-02
Page 29-09
December 1, 1978