ASSEMBLY OF MAIN GEAR OLEO. (Refer to Figure 32-1.)
1. Ascertain that all parts are cleaned and inspected.
2. To install the piston tube plug, first lubricate the plug O-ring with hydraulic fluid (MIL-H-5606) and
install it on the plug. Lubricate the inside wall of the tube. 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.
3. 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.
4. To assemble the components of the orifice tube, insert the orifice plate into the bottom of the tube and
secure with snap ring.
5. To install the tube in the oleo housing, insert the tube up through the housing. With the end of the tube
exposed through the top of the housing, install the O-ring, retainer, washer and lock nut. Tighten lock nut only
finger tight at this time.
6. Assemble the components of the piston tube on the tube by placing, in order, the snap ring, washer,
lower bearing with outer and inner O-rings and upper bearing. Align the two .125 diameter holes and the lock
pin holes with the corresponding holes in the piston tube and install pins without force. The outer surface of
the pins must not protrude beyond the outer diameter of the bearing.
7. Lubricate the wall of the cylinder oleo housing and tube, and carefully insert the tube assembly into
the housing, guiding the orifice tube into the piston tube until the snap ring can be installed in the annular slot
at the lower end of the housing. Install the wiper strip; slide the washer into position and secure the assembly
with snap ring.
8. At the top of the housing, tighten the lock nut, torque nut 300 min. to 500 max. inch-pounds.
9. Ascertain that the bushings are installed in the upper and lower torque links and then install links. 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 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.
10. Connect the brake line and bleed the brakes per Bleeding of the Brakes After A Unit Has Been
Changed.
11. Lubricate the gear assembly. (Refer to Lubrication Chart, Chapter 12.)
12. Compress and extend the strut several times to ascertain that the strut will operate freely. The weight
of the gear wheel and fork should allow the strut to extend.
13. Service the oleo strut with fluid and air. (Refer to Oleo Struts, Chapter 12.)
14. Check main gear alignment (refer to Alignment of Main Landing Gear) and gear operation.
15. Remove the airplane from jacks.
REMOVAL OF MAIN LANDING GEAR. (Refer to Figure 32-2.)
1. Place the airplane on jacks. (Refer to Jacking, Chapter 7.)
2. The side brace link assembly may be removed by the following procedure:
A. With the gear in the extended position, disconnect the gear downlock spring.
B. Disconnect the rod end of the actuating cylinder from the retraction fitting of the upper side brace
link by removing the nut, washer and bolt with bushing and spring swivel.
C. Disconnect the lower side brace link from the gear housing by removing the attachment nut,
washer and bolt. Note bushings on each side of the end bearing.
D. Disconnect the upper side brace link from the side brace support fitting stud by removing the
cotter pin, nut, washer and attachment bolt.
E. The side brace support fitting may be removed by removing the cap bolts that secure the fitting to
the web of the spar.
F. Remove the assembly, and further disassemble and inspect as needed.
32-10-04
Page 32-15
December l, 1978
2D22
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL
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