Piper Navajo PA-31 Service Manual page 393

PIPER NAVAJO SERVICE MANUAL
d.
The uplock hook (10) with uplock spring (11) may be installed as follows:
1.
Place the "U" end of the uplock spring (11) over the back of the hook with the loops
toward the back.
2. Spread the spring and snap the loops over the bushing that extends through the hook.
3.
Hook the ears of the spring over the aft side of the hook bracket and push the hook forward
until the bolt holes in the bracket align with the holes in the hook.
4. Bolt the hook in position and ascertain that it rotates freely with no side play and safety.
e. Install the uplock rod or cable (18) by attaching and securing the proper end to the uplock hook and
the other end on the gear actuating cylinder support bolt.
f.
The idler link (24) may be installed by the following procedure:
1.
Align the bolt hole in the link (24) with the lug holes of the support tube (17) and with the
down limit switch contact boss to the right.
2. Insert the head of the pivot bolt into the hole in the side of the up limit switch bracket far
enough to allow the threaded end of the bolt to be inserted into the tube lug and link. Tighten the nut
on
the bolt allowing the link to turn free with no side play.
3. Attach retraction rod (36) and actuating cylinder rod end (33) to the link (24). Do not
connect retraction rod (36) to link (39) until gear adjustment has been completed.
4.
The downlock spring (22) may be attached after gear check and adjustment has been
completed.
g.
To install the gear housing assembly, position the gear so that the attachment points on the
housing align with the attachment plates. If needed, install spacer washers between attachments to
allow a
minimum amount of side play. Tighten the pivot bolt nuts to a snug fit, allowing the gear to swing free,
and
safety.
h.
The drag links may be installed as follows:
1. Align upper (37) and (39) and lower (41) drag link bolt holes. Install bolt, uplock bearing
(54) and secure.
2.
Ascertain that the linkage through center travel is within tolerance.
3.
Attach the upper drag links (37 and 39) to the attachment plates, tighten nuts to a snug fit,
allowing the links to swing free, and safety.
4.
Attach the lower drag link (41) to the landing gear housing (44) and temporarily install bolt.
Secure and safety bolt after gear has been adjusted.
5. Manually retract and extend the landing gear several times to ascertain smoothness of
operation.
6. Attach the retraction rod (36) to the upper drag link (39) and adjust the rod to obtain
approximately .06 of an inch clearance between the lower locknut (35) and link (39).
CAUTION
Ascertain that the locknuts (35) are tightened against the
retraction rod (36).
Revised: 10/12/83
LANDING GEAR AND BRAKE SYSTEM
2E15