Piper TURBO ARROW III - Page 206

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TABLE VI-III. HYDRAULIC SYSTEM TROUBLESHOOTING (cont)
Pump fails to shut off § Pressure switch § Replace switch.
though gear has fully inoperative.
retracted.
§ Pressure switch out § Replace switch.
of adjustment.
§ Pump retraction solenoid § Replace solenoid.
sticking (inboard solenoid).
§ Internal leakage § Check back-up extension
of system. unit valve for internal
leakage.
§ Check gear actuating
cylinders for internal
leakage.
§ Check for internal damage
to hydraulic pump.
§ Extemal leakage § Check back-up extension
of system. unit valve or free fall
valve for external leakage.
§ Check gear actuating
cylinders for external
leakage.
§ Check for broken or
damaged hydraulic
lines or hoses.
§ Pump relief valve out § Replace pump.
of adjustment.
Pump fails to shut off § Pump extension solenoid § Replace solenoid.
though the gear has sticking (outboard solenoid).
full extended.
§ Applies to all airplanes.
Trouble Cause Remedy
Revised: 2/13/89
CHEROKEE ARROW III SERVICE MANUAL
HYDRAULIC SYSTEM