Piper Navajo PA-31 Service Manual page 341

Figure 6-20. Power Pack Handle-Release Mechanism (Wiebel Too)
6-69. DISASSEMBLY OF LANDING GEAR HANDLE-RELEASE MECHANISM. (Refer to Figure 6-20.)
a. Remove lockwire ( 11).
b. Using a punch, drive the roll pin (10) out of the arm (9) and remove arm.
c. Using a punch, drive the roll pin (8) out of the return cam (7), and remove return cam.
d.
Pull the input shaft assembly (12) from Power Pack.
6-70. 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 Specification
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. Inspect roll pin (4) on spur gear (3) to insure it does not extend more than .062 in. from the gear
outside surface, if it does replace the roll pin.
e. Repairs are limited to replacement of parts,"O" rings and gaskets.
f. The parts catalog should be used to obtain the proper parts for the Power Pack being serviced.
6-71. ASSEMBLY OF POWER PACK.
a. Use new "0" rings and gaskets during assembly.
b. Lubricate all "0" rings with petrolatum per VV-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.
Revised: 10/12/83
HYDRAULIC SYSTEM
Effectivity
2C11
WIEBEL
PIPER NAVAJO SERVICE MANUAL