Piper COMANCHE PA-24-180 Service Manual page 209

PIPER COMANCHE SERVICE MANUAL
e. Compress the puion cube (8), reach up along the cube and release the snap ring (29) from the
annular sioc at the bottom of the oleo housing.
f. Pull the piston rube with component pars from the cyinder housing.
g. The piston cube componenus may be removed by reaching in the rube and pushing out the upper
bearing retainer pins (23). Slide off the upper bearing (22). lower bearing (24) with "O" rings (25 aid 26).
wiper (27), washer (28) and snap ring (29).
h. To remove the orifice tube (19) from the oleo housing. remove the locknut (12) and washer (13)
from the top of the housing. Draw the cube with back-up ring (14), "0" ring (15) and ring (16) (PA-24-400
only) from the housing.
i. The orifice plate (17) is removed from the bottom of the orifice rube (19) by releasing the snap
ring (18) that holds the plate in position. Expand and remove the ring (16) from the lower end of the cube.
j. To remove the piston cube plug (21) with "0" ring (20) locaed in the lower end of the piston
rube (8), remove the bolt assembly (9) and insert a rod up through the hole i the body of the fork (1),
pushing the plug out through the top of the cube.
6-29. Cieaning. Inspecion And Repar Of Main Ger Oeo.
a. Clean all pars with a suiable dry type cleaning solvent.
b. Inspect the landing gear oleo assembly component for the following:
1. Bearings and bushings for excess wear, corrosion, scracches and overall damage.
2. Retaining pins for wear and damage.
3. Lock rings for cracks, burrs, etc.
4. Cylinder and orifice cube for corrosion, scratches, nicks and excess wear.
5. Orifice plate for hole rescntion.
6. Fork rube 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.
d. Individual replacement of wiper strips may be accomplished per insructions given in paragraph
6-40.
6-30. Assembly Of Main Gear Oleo. (Refer to Figure 6-8 )
a Ascertain hat all parts ire cleaned and inspected.
b. To install the piston tube plug (21), First lubricate the plug "O" ring (20) with hydraulic fluid
(MIL-H-5606) and install it on the plug. Lubricate the inside wall of the piston cube (8). Insert the plug into
the top of the cube and push it to the fork end. Align the bolt holes of the fork, rube and plug. and inmsall
bolt assembly (9). (If a new cube (8) is installed that has not been drilled, press the cube into the fork
housing until it bottoms. Using the fork bolt holes a a guide. drill a pilot hole and ream to 0.250/0.252
through each side of the cube wall. Remove burrs from the inside of the cube and flush the rube with a
suitable solvent to remove all metal particles.
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 rube.
d. To assemble the components of the orifice tube (19). insert the orifice plate (17) into the bottom
of the cube and secure with snap nng (18). Insall rig (16) (PA-24-00 only) on the lower end ot the cube.
e. To install the orifice tube m the oleo housing (7). insert the tube up through the housing With the
end of the rube exposed through the top of the housing, install the "0" ring (15), back-up ring (14) washer
(13). and locknut (12). Tighten locknut only finger tight at this time.
LANDING GEAR AND BRAKE SYSTEM
ISSUED: 8/18/72
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