Installation Of Main Landing Gear 3E1 - Piper PA-31-350 Maintenance Manual

PIPER AIRCRAFT
T-1020
AIRPLANE MAINTENANCE MANUAL
8. General condition of limit switches and wiring for fraying, poor connections or conditions that
may lead to failures.
9. Attach the upper and lower drag links and check that when stop surfaces of the two links contact,
linkage is .063 to .156 inch through center. (Refer to Figure 32-2.) Should this distance exceed the required
through center travel and all bolts and bushings are tight, replace one or both side brace links.
10. Repair of the landing gear is limited to reconditioning of parts such as replacing bearings and
bushings, smoothing out minor nicks and scratches, repainting of areas where paint has chipped or peeled and
replacement of parts.
INSTALLATION OF MAIN LANDING GEAR. (Refer to Figure 32-2.)
-NOTE -
When assembling any units, lubricate bearings andfriction surfaces
with proper lubricant as described in Chapter 12.
1. Position the attachment plates of the landing gear housing and upper drag links and bolt in place.
2. The uplock hook may be installed by the following procedure:
A.
Place the "U" end of the uplock spring over the back of the hook with the loops also toward
the back.
B.
Spread the spring and fit the loops over the bushing that extends through the hook.
C.
Slide the hook inboard through the bracket until the bracket hole aligns with the bolt hole in
the hook.
D.
Install the pivot bolt and tighten so the hook will rotate freely, yet without side play.
3. Attach the uplock cable or rod with the proper end attached to the hook and the other end to the
crank fitting. Attach the emergency actuator rod to the hook also.
4. To install the main 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 end play. Tighten nut on each pivot bolt to a snug fit, allowing the gear to swing free, and
safety.
5. The upper and lower side brace link assembly may be installed by the following procedure:
A.
Install the forward upper link pivot tube attachment fitting to the spar and secure with cap
bolts.
B.
Slide the pivot shaft through the attachment plate and into the attachment fitting. Secure the
pivot shaft to the attachment fitting.
C.
Ascertain that the forward upper arm is installed on the link. Install the link on the pivot shaft
and secure with washers and nut.
D. The aft upper drag link may be installed by sliding the link on the aft attachment plate pivot
bolt. Tighten the nut to allow the link to swing free with no side play and safety.
E.
Position the lower link between the upper drag link ends, install bolt assembly and tighten to
allow the link to turn free with no side play.
F.
Attach the lower drag link to the landing gear housing, secure and safety. Move the gear in and
out of the downlock position several times to determine that there is no binding.
6. Position the downlock switch bracket between the forward and aft upper drag links and bolt in
place.
7. The downlock hook may be installed on the drag link assembly by the following procedure:
A. Place the "U" end of the downlock spring over the back of the hook with the loops also toward
the back.
B.
Spread the spring and fit the loops over the bushing that goes through the hook.
C.
Insert the ends of the spring into holes located in the downlock switch bracket on each side
of the drag link assembly. Push the hook down between the two upper drag links until the bolt holes in the links
align with the bushing hole of the hook.
D.
Insert the pivot bolt and on each side of the bushing install spacer washers to maintain a
minimum amount of side play. Secure bolt and safety.
32-12-03
Revised: November 17, 1983
Page 32-11
Interim Revision: October 9, 1987
Issued: September 2, 1981
3E1