Nose Landing Gear System; Disassembly Of Nose Gear Oleo - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
7-3. 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 mal-
functions 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.
7-4. LANDING GEAR SYSTEM.
7-5. NOSE LANDING GEAR SYSTEM.
7-6. DISASSEMBLY
OF NOSE GEAR OLEO. (Refer to Figures 7-1 and 7-2.) 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 on later models. as
shown in Figure 7-2. cut safety wire (1). and remove bolt (2). washer (3). nut (4). washer (5). spring (6).
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 (II) 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 (I I 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.
NOTE
Prior to disassembling the upper bearing (2) with retaining pins (I)
from the piston tube (26). place a reference mark. with a grease
pencil. from the upper bearing to the piston tube. This will ensure
proper indexing of parts upon reassembly.
j.
Pull the piston tube (26) with component parts from the cylinder.
k.
The piston tube components may be removed by reaching in the tube and pushing out the upper
bearing (2) and retaining pins (1). Slide off the tube. the upper bearing (2). spacer (3). lower bearing (5) with
outer and inner O-rings (4 and 6). wiper strip (7). washer (8) and retainer ring (9).
1.
To remove the orifice tube (15). remove bolt (38) and washer (39) of the orifice tube from the top of
the cylinder. Pull the tube from the cylinder.
Revised: 10/5/83
2D17
LANDING GEAR AND BRAKE SYSTEM