Piper Cherokee Six - Page 309

PIPER CHEROKEE
SIX SERVICE
MANUAL
6A-3. TROUBLESHOOTING.
Mechanical
and electrical
switch
troubles
peculiar to
the
landing gear
system are listed
in Table VIA-IV
at the back
of this section.
When
troubleshooting,
first
eliminate
hydraulic
malfunctions
as listed in
Section VA.
Then
proceed to
switch malfunctions
and
last to the mechanical
operation
of the
gear itself, both
of which
are listed
in this section.
Always
place
the airplane
on jacks
before
attempting
any
troubleshooting
of
the gear.
To operate
the
gear, the
emergency
gear
lever must
be
maintained in the
up override position.
6A-4.
LANDING
GEAR
SYSTEM.
6A-5.
NOSE LANDING
GEAR SYSTEM.
6A-6. DISASSEMBLY
OF NOSE
GEAR OLEO.
(Refer to Figure 6A-1.)
The nose gear
oleo assembly
may be
removed and
disassembled
from the
gear oleo housing
with the
gear
removed
from or
installed
on the
airplane.
a. Place the airplane
on jacks. (Refer to Jacking,
Section II.)
b. Place
a drip pan under
the nose
gear to catch
spillage.
c. Remove
air and fluid from the oleo strut. Depress
the air valve core pin until strut
chamber
pressure
has diminished;
remove
the filler plug
and with
a small hose
siphon as
much hydraulic fluid
from the strut as
possible.
d.
To remove
the complete
cylinder
and
fork
assembly
from
the
oleo
housing
(21).
cut
safety
wire (2)
at the
top of the
unit and
remove
cap bolts
(1) that
attach steering
arm
( 1)
and
aligner guide
bracket (12)
to the top of
the oleo cylinder
(23).
e.
Disconnect
the shimmy
dampener
by removing
each cotter
pin, nut, washer
and bolt
that connects
the dampener
to the oleo
cylinder (23) and
housing.
f.
Release
and remove
the snap
ring (17)
and washer(s)
(43), if installed,
at
the top
of
the
housing
(21), and
pull the complete
cylinder
and
fork assembly
from
the bottom
of the
housing.
The upper
and lower
housing
bushings
(20 and
22) should
remain
pressed
in the
housing.
g. To
remove the
piston tube
(39) and fork
(42) from
the cylinder
(23), first
separate
the upper
and lower
torque links
(24 and 26)
by removing
the link connecting
bolt
assembly
(25) and
then separate
the two
links. Note
spacer
washer between
the two
links.
h.
Compress
the piston
tube (39); reach
up along
the tube
and release
the snap ring
(38)
from the
annular
slot at the
bottom
of the
oleo housing.
i. Pull the
piston tube (39)
with component
parts from
the cylinder.
j. The
piston
tube components
may be removed
by
reaching
in the
tube and
pushing
out the upper
bearing retainer pins
(27). Slide from
the tube, the upper
bearing (29), lower
bearing
(34)
with outer
and inner
"O"
rings (33
and 35),
wiper strip
(36), washer
(37)
and
snap ring (38).
LANDING GEAR AND BRAKE SYSTEM
Issued: 7/28/75
2C9