Piper Cherokee Six Service Manual page 247

PIPER CHEROKEE SIX SERVICE MANUAL
TABLE VA-III. HYDRAULIC SYSTEM TROUBLESHOOTING (cont.)
Trouble
I
Cause Remedy
NOTE
The out of adjustment or failed switch may be
noting which down light is not lit.
determined by
Pump running inter-
mittently after gear
has retracted.
Leakage of high pres-
sure check valve.
Internal leakage of
system.
Remove pump and re-
place check valve.
Check auxiliary retrac-
tion unit valve for
internal leakage.
Check gear actuating
cylinders for internal
leakage.
External leakage of
system.
Check back-up exten-
sion unit valve for
external leakage.
Check gear actuating
cylinders for external
leakage.
Check for broken or
damaged hydraulic
lines.
Gear stops part way
up, but pump con-
tinues to run.
Pump high pressure
relief valve out of
adjustment.
Replace pump.
HYDRAULIC SYSTEM
Issued: 7/28/75
1K7