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 components 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).
k. To remove the orifice tube (30, remove the large lock nut (16) and lock washer (19) from the top of the
cylinder. Pull the tube from the cylinder.
l. The orifice plate (31) is removed from the bottom of the orifice tube be releasing the snap ring (32)
that holds the plate in position.
m. To remove the piston tube plug (40) with O-ring (41) located in the lower end of the tube, remove the
bolt assembly and insert a rod up through the hole in the body of the fork (42). Push the plug out
through the top of the tube.
7-7. CLEANING, INSPECTION AND REPAIR OF NOSE GEAR OLEO.
a. Clean all parts with a suitable dry type cleaning solvent.
b. Inspect the landing gear oleo assembly component 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, bum, etc.
4. Cylinder and orifice tube for corrosion, scratches, nicks and excess wear.
5. Upper and lower cylinder bushings loose or turning in cylinder.
6. Orifice plate for hole restriction.
7. Fork tube for corrosion, scratches, nicks, dents and misalignment.
8. Air valve general condition.
c. Repair of the oleo is limited to smoothing out minor scratches, nicks and dents and replacement of
parts.
7-8. ASSEMBLY OF NOSE GEAR OLEO. (Refer to Figure 7-1.)
a. Ascertain that parts are cleaned and inspected.
b. To install the piston tube plug (40), first lubricate the tube plug and O-ring (41) with hydraulic fluid
(MIL-H-5606) and install the O-ring on the plug. Lubricate the inside wall of the tube (39), insert the
plug into the top of the tube 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 the components of the orifice tube (30), insert the orifice plate (31) into the bottom of the
tube, with the countersunk side of the orifice hole exposed. Secure the plate with the snap ring (32),
lubricate and install the O-ring (28) on the upper end of the tube.
e. Insert the orifice tube (30) up through the bottom of the cylinder (23). With the tube exposed through
the top of the cylinder, install the lock washer (19) and insert roll pin (18) through the lock washer into
the piston. Install the tube lock nut (16) finger tight at this time.
f. The fork (42) and tube (39) assembly may be assembled by installing the tube components on the tube.
In order slide onto the tube, the snap ring (38), washer (37), lower bearing (34) with outer and inner
O-rings (33 and 35) and upper bearing (29). Align the lock pin holes in the upper bearing with the pin
holes in the piston tube (39) and install pins (27).
Revised: 2/13/89
1J2
* CHEROKEE ARROW III SERVICE MANUAL
LANDING GEAR AND BRAKE SYSTEM
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