Disassembly Of Door Vent Valve; Disassembly Of Landing Gear Handle And Handle-Release Mechanism; Cleaning, Inspection And Repair Of Power Pack; Assembly Of Door Vent Valve - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO
IEFTAIN SERVICE MANUAL
6-30. DISASSEMBLY OF DOOR VENT VALVE. (Refer to Figure 6-6.)
a. Remove the door vent valve (69) from the reservoir. Remove the O-ring (71) from the body. The
door vent valve should not be disassembled except for replacement of parts.
b. Remove the pin (74) from the valve body (75) and retainer (70). Use care when removing the
pin, as the spring (72) is under a slight load.
c.
Remove the retainer (70), O-ring (71), and poppet (73) from the valve body (75).
NOTE
The valve body and poppet are matched parts. If necessary to
replace, replace as an assembly only.
6-31. DISASSEMBLY OF LANDING GEAR HANDLE AND HANDLE-RELEASE MECHANISM. (Refer
to Figure 6-8.)
a. Remove the two hex-head retainers (12) (adjusting plugs), springs (11), and plungers (10) from
the handle return housing.
b. Cut the safety wire (9) and remove the two screws (8) attaching the handle release housing to the
power pack, and remove the housing.
c. Using a punch, drive the roll pin from the cam, and remove the cam from the landing gear handle
shaft.
d. Pull the assembly from the power pack.
6-32. CLEANING, INSPECTION AND REPAIR OF POWER PACK.
a.
Discard all old O-rings and gaskets.
b. Remove the line fitting caps and wash all parts in dry cleaning solvent (Federal Specifications
P-S-661, or equivalent) and dry with filtered compressed air.
c. Inspect all parts for scratches, scores, chips, cracks and indications of excess wear.
d. Repairs are limited to replacement of parts, O-rings and gaskets.
e.
The Parts Catalog should be used to obtain the proper parts for the power pack being serviced.
6-33. ASSEMBLY OF POWER PACK.
a. Use new O-rings and gaskets during assembly.
b. Lubricate all O-rings with petrolatum per W-P-236 or equivalent during assembly.
c. Lubricate all threaded surfaces on the various valves in the power pack with MIL-G-7711 grease
or equivalent before installing.
6-34. ASSEMBLY OF DOOR VENT VALVE. (Refer to Figure 6-6.)
NOTE
The valve body and poppet are matched parts. If necessary to
replace, replace as an assembly only.
a. Install the poppet (73) in the valve body (75) and insert the spring (72) in the body. Be sure that
the spring enters the poppet.
b.
Lubricate and install the O-ring (71) on the retainer (70) and insert the retainer in the valve body
(75). Align the holes in the retainer with the holes in the valve body.
c. Install the pin (74) through the valve body and retainer.
d. Lubricate threads, install O-ring (76) on the valve body and install the assembly in the reservoir.
Tighten securely.
Reissued: 9/23/80
HYDRAULIC SYSTEM
2B8