Piper Lance II - Page 213

LANCE
II SERVICE
MANUAL
TABLE
VI-III.
HYDRAULIC
SYSTEM
TROUBLESHOOTING
(cont.)
Trouble
I
Cause
I
Remedy
NOTE
The
out
of
adjustment
or
failed
switch
may
be
determined
by
noting
which
down
light
is
not
lit.
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.
Issued:
1/3/78
HYDRAULIC
SYSTEM
1121