Piper Navajo PA-31 Service Manual page 140

PIPER NAVAJO SERVICE MANUAL
f.
Remove the two door latch covers and the latch springs (13). Also remove the spring (17)
between the door assembly and hook (19) on the tube assembly. Then remove hook.
g.
Remove four bolts, washers and locknuts holding, the latch mechanisms in place (two on each
side).
h.
The outer handle (9) can be removed by disconnecting the spring (15) between both halves of the
actuator assembly (16) and removing the cotter pin and pin (14). The handle and half of the actuator can
now be removed and further disassembled by removing two screws, shim washers and plate from actuator.
Note the amount and thickness of the shim washers (10) removed.
i.
Each latch mechanism can be removed by pulling it out of its own side of door assembly.
j.
The key lock assembly is removed by removing the retainer nut, washer and weather seal.
4-64. INSTALLATION OF DOOR LATCH ASSEMBLY. (Refer to Figure 4-11.)
a.
Install key lock assembly into hole in door and secure with weather seal, washer and retainer nut.
b.
The latch mechanisms should be installed next; Be careful to place each half into its proper place.
The latch mechanism with the lock assembly goes in the right side of door and aligns the tube assemblies and
bushing.
c.
Secure latch mechanisms with the four bolts, washers and locknuts, two for each side of door.
d.
Assemble outer handle with plate and shim washers (10) and secure to the actuator with two
screws. (Use shims to align the handle flush with outer door surface.) Place handle assembly into door and
connect to the other half of actuator assembly with pin and cotter pin (14). Connect the spring (15)
between both halves of actuator assembly.
e.
Install hook on tube assembly and connect spring (17) between hook and door assembly. Also
connect springs on both ends of latch assemblies and lubricate lightly. The door latch mechanism
covers can now be installed with five screws for each side.
f.
Install inner handle with screws and shim washers (21). Use only enough shims to keep the
handle from rubbing against the trim panel.
g.
Align the holes in the tube assemblies and bushing, and insert the roll pin.
h.
The safety latch actuator rod assembly (7) should be connected to the safety latch stop bracket
assembly (1) with washer and cotter pin before installing in door assembly.
i.
Install safety latch mechanism into door assembly and adjust the eccentric bushing (4) in latch to
position the safety latch with the cam on the tube assembly. Install the spring (6) between the safety latch
(1) and door assembly and check for proper engagement of safety latch with the cam. Tighten bolt holding
mechanism.
j.
Adjust the screw (11) on the door mechanism to remove any excess travel in the outer handle
and secure with locknut.
k.
Install the protector panel behind the stems, and the door trim panel assemblies with the proper
screws.
4-65. ADJUSTMENT OF DOOR LATCH ASSEMBLY. (Refer to Figure 4-11.) There are two adjustments
in the latching mechanism that should be checked to insure proper operation of the mechanism. Removal
of right-hand inner panel is necessary.
a.
Adjust the set screw (18) located next to the inner handle by first loosening the locknut on the
screw and then adjusting the screw to eliminate any lost motion in the operation of the outer door handle.
Secure the locknut after the adjustment is complete.
b.
There is an eccentric bushing (4) located in the safety latch mechanism that can be rotated by
loosening a locknut and rotating the bushing (4) to position the safety latch (1) in its proper position with
the cam on tube assembly. Secure the locknut after adjustment is complete.
c.
Refer to Section XI for adjustment instructions for the optional door ajar switch.
Revised: 3/11/81
STRUCTURES
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