PIPER
COMANCHE
SERVICE
MANUAL
c. Repair
of
the
housing
is
limited
to
smoothing
out
minor scratches, nicks and dents and replacement
of
parts.
d. Individual replacement
of
the
wiper strip may be accomplished per instructions given in
paragraph
6-40.
6-8. Assembly
of
Nose
Gear
Oleo. (PA-24-180 and PA-24-250, Serial Nos.
24-1
to 24-214 inclusive.) (Refer to
Figure
6-1.)
a. Ascertain
that
parts
are cleaned and inspected.
b.
To
install
the
piston
tube
plug (32), first lubricate the
tube
plug
and
"0"
ring (33) with hydraulic
fluid (MIL-H-5606), and install the
"0"
ring on the plug. Lubricate
the
inside wall
ofthe
piston
tube
(12), insert
the
plug
into
the top
of
the
tube
and
push
it to the fork end. Align
the
bolt holes
of
the fork (18),
tube
and plug,
and
install bolt (CT) (16) with washers
and
nut.
(If
a new
tube
(12)
is
to
be installed
that
has not been drilled,
press the
tube
intothefork
piston
housing(
18)
until it bottoms. Using the bolt holes in
the
fork body
as
a guide,
drill a pilot hole and ream to
0.250jO.252
through
each side
of
the
tube
wall. Remove burrs from
the
inside
of
the
tube
and
flush
the
tube
with a suitable solvent
to
remove all metal particles.)
c.
If
desired,
cement
a cork in
the
hole in
the
bOllom of the fork body to prevent dirt
from
entering
between
the
fork
and
tube.
d.
To
assemble
the
components
of
the
orifice
tube
(21), insert the orifice plate (22) into
the
bOllom
of
the
tube
and secure with
snap
ring (23). Lubricate
and
install
"0"
ring (20)
and
back-up washer (19) on the
upper
end
of
the tube.
e.
Insert the orifice
tube
(21) in
the
oleo housing (3). Wjth the end
of
the
tube
exposed
through
the
top
of
the
housing, install washer (2) and
locknut
(I).
Tighten
lOCknut only fmger tight
at
this time.
f.
Assemble the
components
of
the
piston tube (12)
on
the
tube
by placing, in
order
,the
snap
ring (31),
washer (30), lower bearing (27), with
inner
and
outer
"0"
rings (34
and
28), spacer (26)
and
upper
bearing
(25).
Align the lock pin hole
of
the
upper
bearing
with
the
pin holes in
the
piston
tube
and
install pins (24).
g.
Lubricate
the
inner
wall
of
the
housing (3)
and
tube
(12). Carefully insert the
tube
assembly
into
the
housing, guiding the orifice
tube
(21)
into
the
piston
tube
until the
snap
ring (31) can be installed in the
annular
slot
at
the
lower end
of
the
housing.
h.
At
the top
of
the housing, tighten the orifice
tube
locknut
(I).
I.
At the
bollom
of
the housing, install wiper
strip
(29), slide washer (30) into position and secure
assembly with snap ring (31).
j. Ascertain
that
the
bushings
are
installed in
the
upper
and
lo",:er
torque
links (13 and
15)
and
then
install the links.
NOTE
Ascertain
that
the
torque
links are properly installed
to
insure
complete travel
of
the
piston
tube
and
fork assembly within the oleo
housing.
The
torque
link bolt assemblies 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 washer between the two links as
that
removed to maintain correct wheel alignmenl.)
Tighten
the bolts only tight enough
to
allow no side play in
the links, yet
be
free
enough
to rotate. Safety nuts with coller pins.
k.
Lubricate the gear assembly. (Refer to Lubrication
Chart,
Section
11.)
1.
Compress
and
extend the
strut
several times
to
ascertain
that
the strut will operate freely and
torque
links
do
not
restrict travel in the compressed position.
The
weight
of
the gear wheel and fork should allow
the
strut
to extend.
m.
Service the oleo strut with fluid and air.
(Refer
to Oleo
Struts,
Section II.)
n.
Check the nose gear alignment (refer
10
paragraph
6-16)
and
gear operation.
o.
Adjust the shimmy dampener collar
by
means
of
its washers to give a
good
firm fit.
Ifthe
collar
is
too
tight,
the
result will be
hard
steering
and,
if
too
loose, nose wheel shimmy will
be
present.
It
may be necessary,
at
times, to try several combinations
or
thicknesses
of
washers to get the
proper
result.
111
LANDING
GEAR
AND
BRAKE
SYSTEM
REVISED:
4/10/81
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