Landing Gear System; Nose Landing Gear System - Piper Navajo PA-31 Service Manual

PIPER NAVAJO SERVICE MANUAL
the parking brake handle.
Servicing the hydraulic and brake systems is found in Section II.
7-2. TROUBLESHOOTING. Mechanical and electrical switch troubles peculiar to the landing gear system
are listed in Table VII-I at the back of this section. When troubleshooting, first eliminate hydraulic
malfunctions as listed in Section VI. Then proceed to switch malfunctions and last to the mechanical
operation of the gear itself, both of which are listed in this section. Always place the airplane on jacks
before attempting any troubleshooting of the gear.
7-3. LANDING GEAR SYSTEM.
74. NOSE LANDING GEAR SYSTEM.
7-5. DISASSEMBLY
OF NOSE GEAR OLEO. (Refer to Figures 7-1 and 7-1a.) The nose gear oleo
assembly may be removed and disassembled from the gear oleo housing with the gear removed from or
installed on the airplane.
a.
Place the airplane on jacks. (Refer to Jacking, Section II.)
b. Place a drip pan under the nose gear to catch spillage.
c. Remove air and fluid from the oleo. (Refer to Oleo Struts, Section II.)
d.
To remove the complete cylinder and fork assembly from the oleo housing (35) , cut the safety
wire (44) and remove the cap bolts (37) that attach the steering arm (42) and aligner guide bracket (40) to
the top of the oleo cylinder (12) .
e. To remove the complete cylinder and fork assembly from the oleo housing (16) on later models, cut
safety wire (1). and remove bolt (2), washer (3). nut (4). washer (5), spring (6). and sleeve (18) and special
washers (7) that secure the steering arm (8) to the plate assembly (12), cut safety wire (10) and remove cap bolt
(I I) that attach the plate assembly (12) and aligner guide (13) to the top of the oleo cylinder.
f.
Disconnect the shimmy dampener (27) by removing the bolt assembly (28) that connects the
dampener to the cylinder.
g.
Release and remove the retainer ring (10) at the top of the housing (35) and pull the complete
cylinder assembly from the bottom of the housing. The upper and lower housing bushings (11 and 13)
should remain pressed in the housing.
h.
To remove the piston tube (26) assembly from the cylinder (12), separate upper and lower
torque links (25 and 22) by removing the connecting bolt (24) with washer, nut and cotter pin (43). Note
spacer washer (23) between the two links.
i. Compress the piston tube (26); reach up along the tube and release the snap ring (9) from annular
slot at the bottom of the oleo housing.
j. Pull the piston tube (26) with component parts from the cylinder.
NOTE
Prior to disassembling the upper bearing (2) with retaining pins (1)
from the piston tube (26) place a reference mark with a grease pencil
from the upper bearing to the piston tube. This will insure proper
indexing of parts upon reassembly.
Revised: 3/14/83
LANDING GEAR AND BRAKE SYSTEM
2E7