Piper Navajo PA-31 Service Manual page 407

PIPER NAVAJO SERVICE MANUAL
3. Remove the downlock switch bracket (33) with switch (32) by removing the four screws
that
attach the bracket between the forward and aft side brace links (31 and 36). Remove the
clamps that secure the
electrical wiring to the side brace link.
4.
Disconnect the lower side brace link (35) from the gear oleo housing (40) and let
the link
assembly swing down.
5. Remove the bolt (67) that connect the upper and lower side brace links.
6.
Disconnect the aft link (36) from its attachment plate.
7.
To remove the forward link (31), remove the nut with washers that is holding the link on
its
pivot shaft (28). Slide the link from the pivot shaft.
8. The pivot shaft (28) may be removed by reaching through the pivot shaft bracket access
hole,
removing the bolt securing the shaft to the shaft fitting (29). Slide the tube through
the attachment bracket
(27). The shaft fitting (29) is attached with cap bolts, washers and anchor nuts.
f.
Disconnect the outboard gear door retraction rods (54) at the gear housing (40).
With the lower
side brace link (35) disconnected from the housing, the gear may be removed by removing
the attachment bolt
assemblies at the attachment plates (37 forward) on each side of the gear housing. Note,
if any, the number and
location of spacer washers between the gear housing and attachment plates.
g. The uplock hook (11) and spring (9) may be removed by disconnecting the uplock rod
or cable (14)
from the hook and then the hook pivot bolt.
h. The uplock rod or cable (14) may be removed by disconnecting the rod or cable end at
the lock crank.
i. The landing gear and upper drag link attachment plates may be removed by
reaching through the
access holes to the nuts that secure the plates. While holding the nuts, wrench the
attachment bolts.
7-22. CLEANING, INSPECTION AND REPAIR OF MAIN LANDING GEAR.
a. Clean all parts with a suitable cleaning solvent.
b.
Inspect the landing gear assembly components for the following unfavorable conditions:
1.
Bolts, bearings, bushings and ball joints for excess wear, corrosion and damage.
-
WARNING -
Refer to latest revision of Piper Service Bulletin 845 for specific
inspection/replacement instructions for the Main Landing Gear
Forward Side Braces. Piper considers compliance with service
bulletins as mandatory.
2.
Gear housing, side brace links, idler links, rods and attachment plates for cracks, bends
or
misalignment.
3. Lock hook for wear and oversized bearing surfaces.
4.
Lock spring for wear, corrosion and loss of spring tension.
5. Uplock roller for freedom of movement and minimum wobble.
6. Uplock rod or cable and end bearings for corrosion and freedom of movement. Also inspect
the sliding surfaces of the uplock rod.
7.
Downlock pin for excess wear and corrosion.
8.
General condition of limit switches.
9. Wiring for fraying, poor connections or conditions that may lead to failures.
10. Attach the upper and lower drag links and check that when stop surfaces of the
two links
contact, linkage is 0.063 to 0.156 inch through center. (Refer to Figure 7-7.) Should
this distance exceed the
required through center travel and all bolts and bushings are tight, replace one or both
side brace links.
Revised: October 12, 1983
Interim Revision: October 9, 1987
LANDING GEAR
AND
BRAKE SYSTEM
2F5