Nose Gear Oleo Assembly; Nose Landing Gear Removal - Piper Navajo Chieftain PA-31-350 Service Manual

7-8. ASSEMBLY OF NOSE GEAR OLEO. (Refer to Figures 7-1 and 7-2.)
a.
Ascertain that parts are clean and inspected.
b.
To assemble the orifice tube (15). insert the orifice plate (16) into the bottom of the tube, with the
countersunk side of the orifice hole exposed. Secure the plate with the retainer ring (17). Lubricate and install
the O-ring (14) on the upper end of the tube.
c.
Insert the tube up through the bottom of the cylinder (12). Orifice tube (15) is fully installed in
cylinder housing (12) when the upper end of the orifice tube is approximately .062 lower than flush with the
upper end of cylinder assembly.
d.
The fork tube assembly may be assembled by installing the tube components on the tube (26). In
order. slide onto tube: retainer ring (9), washer (8). lower bearing (5) with outer and inner O-rings (4 and 6).
spacer (3) and upper bearing (2). Utilizing the reference marks applied during disassembly. align lock pin holes
of the upper bearing and piston tube and install pins (1).
e.
Lubricate the inner wall of the cylinder. Carefully insert the piston tube assembly into the bottom
of the cylinder (12). allowing the orifice tube to guide itself into the piston tube, until the retainer ring (9) can
be installed in the annular slot at the end of the cylinder. Install wiper strip (7), slide washer (8) into position
and secure assembly with retainer ring.
f. At the top of the cylinder (12) tighten the orifice tube bolt (38).
g.
Install the upper and lower torque links (22 and 25).
h.
Ascertain that the upper and lower oleo housing bushings (11 and 13) are installed. Install the
cylinder into the oleo housing and secure with retainer ring (10).
i.
At the top of the oleo housing, install on the cylinderthe aligner guide bracket (40) and steering arm
(42). Torque cap bolts (37). 30-35 in.-lbs. and safety with MS20995C40 wire (44).
j.
At the top of the oleo housing on later models as shown in Figure 7-2. install on the cylinder the
aligner guide bracket (13) and the plate assembly (12). Torque cap bolts (11). 50-55 in.-lbs. and safety with
MS20995C51 wire. Install steering arm (8). special washers (7). sleeve (18). spring (6). washer(5). nut (4) with
torque of 550-560 in.-lbs.. washer (3). bolt (2) with torque of 45-70 in.-lbs.. and safety with MS20995C51 ire.
NOTE
Bearing surface of cam. cam follower to be greased on installation.
Use MIL-G-23827.
k.
Install the shimmy damper (27). On aircraft which utilize shimmy damper Piper P/N 73010-2.
follow instructions listed below.
1.
Place the shimmy damper in the clamp and secure with bolt, washers and nut.
2. Rotate the nose gear to full right tow limit and retain.
3.
Extend shimmy damper to full travel.
4.
Adjust the rod end bearing until the attachment bolt fits the hole in the bracket.
5.
Remove the bolt and turn the rod end bearing "out" one full turn.
6.
Complete the installation by securing the rod end to the bracket.
l.
Lubricate the gear assembly. (Refer to Lubrication Chart. Section II.)
m.
Service oleo strut with fluid and air. (Refer to Oleo Struts. Section II.)
n.
Check the nose gear for alignment (refer to Paragraph 7-13) for operation.
7-9. REMOVAL OF NOSE LANDING GEAR. (Refer to Figure 7-3.)
a.
Remove the right and left access panels (sta. 70.0) to the aft interior portion of the nose section.
Remove the access plates located on the nose baggage compartment floor panel to gain access to the landing
gear attachment bolts. (Refer to Access Plates and Panels. Section 11.)
b.
Place the airplane on jacks. (Refer to Jacking. Section II.)
c.
With the hand pump. retract the nose gear slightly to relieve the gear from its down-locked position.
Revised: 10/5/83
2D21
LANDING GEAR AND BRAKE SYSTEM
NAVAJO CHIEFTAIN SERVICE MANUAL