Piper Cherokee Six - Page 248

PIPER CHEROKEE
SIX SERVICE
MANUAL
TABLE VA-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.
HYDRAULIC
SYSTEM
Issued: 7/28/75
1K8