Piper Lance II - Page 214

LANCE
II
SERVICE
MANUAL
TABLE
VI-III.
HYDRAULIC
SYSTEM
TROUBLESHOOTING
(cont.)
Trouble
Cause
Remedy
Gear
stops
part
way
up,
but
pump
continues
to
run.
(cont.)
Internal
leakage
of
system.
Check
back-up
exten-
sion
unit
valve
for
internal
leakage.
Check
gear
actuating
cylinders
for
internal
leakage.
Check
for
broken
or
damaged
hydraulic
lines.
Hydraulic
fluid
in
reservoir
below
operating
level.
Fill
reservoir
with
hydraulic
fluid.
All
gears
fail
to
free
fall.
Gear
free
falls
at
air
speeds
above
that
required.
Back-up
extension
unit
valve
fails
to
open.
Back-up
extender
unit
hydraulic
valve
fails
to close.
Check
unit
and
valve
and
replace.
Check
extender
unit
spring
adjustment.
Check
hydraulic
valve
for
sticking
open.
Check
extender
unit
diaphragm
for
damage.
Check
for
restriction
in
air
pressure
and
static
lines.
Issued:
1/3/78
1122
HYDRAULIC
SYSTEM