Piper Cherokee Six - Page 333

6A-20.
CLEANING,
INSPECTION
AND
REPAIR
OF
MAIN
GEAR
OLEO.
a.
Clean
all
parts
with
a
suitable
dry
type
cleaning
solvent.
b.
Inspect
landing
gear
oleo
assembly
components
for
the
following:
1.
Bearings
and
bushings
for
excess
wear,
corrosion,
scratches
and
overall
damage.
2.
Retaining
pins
for
wear
and
damage.
3.
Lock
rings
for
cracks,
burrs,
etc.
4.
Cylinder
and
orifice
tube
for
corrosion,
scratches,
nicks
and
excess
wear.
5.
Orifice
plate
for
hole
restriction.
6.
Fork
tube
for
corrosion,
scratches,
nicks,
dents
and
misalignment.
7.
Air
valve
general
condition.
c.
Repair
of
the
oleo
is
limited
to
smoothing
out
minor
scratches,
nicks
and
dents
and
replacement
of
parts.
6A-21.
ASSEMBLY
OF
MAIN
GEAR
OLEO.
(Refer
to
Figure
6A-7.)
a.
Determine
that
all
parts
are
cleaned
and
inspected.
b.
To
install
the
piston
tube
plug
(26),
first
lubricate
the
plug
O-ring
(27)
with
hydraulic
fluid
(MIL-H-5606A)and
install
it
on
the
plug.
Lubricate
the
inside
wall
of
the
tube.
Insert
the
plug
into
the
top
of
the
tube
(25)
and
push
it
to
the
fork
end.
Align
the
bolt
holes
of
the
fork,
tube
and
plug,
and
install
bolt
assembly.
c.
If
desired,
cement
a cork
in
the
hole
in
the
bottom
of
the
fork
body
to
prevent
dirt
from
entering
between
the
fork
and
tube.
d.
To
assemble
components
of
orifice
tube
(12),
insert
orifice
plate
(13)
into
the
bottom
of
the
tube
and
secure
with
snap
ring
(14).
e.
To
install
tube
(12)
in
oleo
housing
(11),
insert
the
tube
up
through
the
housing.
With
the
end
of
the
tube
exposed
through
the
top
of
the
housing,
install
the
O-ring
(9),
retainer
(8),
washer
(7),
and
locknut
(6).
Tighten
locknut
only
finger
tight
at
this
time.
f.
Assemble
components
of
piston
tube
(25)
on
the
tube
by
placing,
in
order,
snap
ring
(24),
washer
(23),
lower
bearing
(20)
with
outer
and
inner
O-ring
(19
and
21)
and
upper
bearing
(18).
Align
the
two
.125
diameter
holes
and
the
lock
pin
holes
with
the
corresponding
holes
in
the
piston
tube
and
install
pins
(17).
g.
Lubricate
the
wall
of
the
cylinder
oleo
housing
(11)
and
tube
(25),
and
carefully
insert
the
tube
assembly
into
the
housing,
guiding
the
orifice
tube
(12)
into
the
piston
tube.
Install
the
wiper
strip
(22),
slide
the
washer
(23)
into
position
and
secure
the
assembly
with
snap
ring
(24).
h.
Tighten
locknut
(6)
at
top
of
housing.
i.
Ascertain
that
the
bushings
are
installed
in
the
upper
and
lower
torque
links
(15
and
16)
and
then
install
links.
The
torque
link
bolt
assemblies
(2,
3
and
4)
should
be
lubricated
and
installed
with
the
flat
of
the
bolt
head
hex
adjacent
to
the
milled
stop
of
the
wide
end
of
the
link.
(Use
the
same
thickness
of
spacer
washers
between
the
two
links
as
those
removed
to
maintain
correct
wheel
alignment.)
Tighten
the
bolts
only
tight
enough
to
allow
no
side
play
in
the
links,
yet
be
free
enough
to rotate.
NOTE
Instructions
contained
in
Paragraph
"j"
pertain
to
left
oleo
strut
assemblies
only.
Revised:
7/29/77
PIPER
CHEROKEE
SIX
SERVICE
MANUAL
2D9