Cleaning, Inspectin And Repair Of The Main Gear Oleo; Assembly Of Main Gear Oleo; Removal Of Main Landing Gear - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
7-20. CLEANING, INSPECTION AND REPAIR OF THE MAIN GEAR OLEO.
The instructions for cleaning, inspection and repair of the main gear oleo are the same as those given
for the nose gear oleo, paragraph 7-7.
7-21. ASSEMBLY OF MAIN GEAR OLEO. (Refer to Figure 7-8.)
a.
Ascertain that all parts are cleaned and inspected.
b.
To assemble and install the orifice tube (4) insert the orifice plate (5) into the bottom of the tube,
with the countersunk side of the orifice hole exposed. Secure the plate with retainer ring (6). Lubricate and
install the O-ring (3) on the upper end of the tube. Insert the tube up through the bottom oleo housing (21).
With the tube exposed through the top of the housing, install washer (2) and tighten cap bolt (1) finger tight.
c. The piston tube assembly may be assembled to the oleo housing (21) by first installing the tube
components on the tube (22). In order slide onto the tube the retainer ring (15). washer(14). lower bearing( I )
with inner (12) and outer (10) O-rings. spacer (9) and upper bearing (8). Utilizing the reference marks, applied
during disassembly. align the lock pin holes of the upper bearing (8) and tube (22) and install retainer pins (7).
d. Carefully insert the piston tube assembly into the oleo housing, guiding the orifice tube (4) into the
piston tube until the retainer ring (15) can be installed in the annular slot at the lower end of the housing. Install
wiper strip (13), slide washer (14) into position and secure assembly with retainer ring. At the top of the
housing, tighten the cap bolt (1).
e. Install the upper and lower torque links (31 and 33). (Use same thickness spacer washers (35) be-
tween the two links as those removed to maintain correct wheel alignment.)
f. Lubricate the gear assembly. (Refer to Lubrication Chart, Section II.)
g.
Service the oleo strut with fluid and air (refer to Oleo Struts, Section II) and safety with MS20995-
C40 wire (39) between the filler plug (20) and cap bolt (1).
h. Check the gear alignment (refer to Paragraph 7-26) and gear operation.
7-22. REMOVAL OF MAIN LANDING GEAR. (Refer to Figure 7-9.)
a. Place the airplane on jacks. (Refer to Jacking, Section II.)
b. Remove the two access plates forward and two access plates aft of the outboard wheel door.
c. With the hand pump, retract the main gear slightly to relieve the gear from its downlocked position
and to lower the inboard gear door (7) out of the way.
d. Disconnect brake line.
e.
To remove side brace link assembly, the following procedure may be used:
I. Disconnect the actuating cylinder (15) and downlock rod or cable (23) from the upper side
brace link arm (26) by removing clevis bolt (63). Disconnect the other end of the downlock rod or cable at
the downlock hook (34).
2. Remove downlock hook (34) and spring (68) by removing pivot bolt (66).
3. Remove the downlock switch bracket (33) with switch (32) by removing the four screws that
attach the bracket between the forward and aft side brace links (31 and 36). Remove the clamps that secure the
electrical wiring to the side brace link.
4. Disconnect the lower side brace link (35) from the gear oleo housing (40) and let the link
assembly swing down.
5. Remove the bolt (67) that connects the upper and lower side brace links.
6. Disconnect the aft link (36) from its attachment plate.
7. To remove the forward link (31), remove the nut with washers that is holding the link on its
pivot shaft (28). Slide the link from the pivot shaft.
8. The pivot shaft (28) may be removed by reaching through the pivot shaft bracket access hole.
removing the bolt securing the shaft to the shaft fitting (29). Slide the tube through the attachment bracket
(27). The shaft fitting (29) is attached with cap bolts. washers and anchor nuts.
Revised: 3/5/84
2E
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LANDING GEAR AND BRAKE SYSTEM
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