Main Landing Gear Installation - Piper PA-44-180 SEMINOLE Maintenance Manual

4. Check the general condition of each limit switch and its actuator, and wiring for fraying, poor connections
or conditions that may lead to failures.
5. Check side brace link through center travel by attaching the upper and lower links, setting them on a surface
table, and ascertaining that when the stop surfaces of the two links touch, linkage is not less than .062 nor
more than .125 of an inch through center. Should the distance exceed the required through center travel and
bolt and bushings are tight, replace one or both links.
6. With side brace links assembled and checked, ascertain that when stop surfaces of the two links contact. the
clearance between each downlock hook and the flat of the downlock pin is not less than 0.010 of an inch.
Should clearance be less than that required, the hook only may be filed not to exceed a gap of more than
0.025 of an inch. The maximum allowable clearance between each hook and the downlock pin that are
service worn is 0.055 of an inch. Should clearance be more than 0.055 of an inch, replace the pin, check
clearance and then if still beyond tolerance, replace hooks. The gap between each hook should be equal.
7. Repair of the landing gear is limited to reconditioning of parts such as replacing components, bearings and
bushings, smoothing out minor nicks and scratches and repainting areas where paint has chipped or peeled.
INSTALLATION OF MAIN LANDING GEAR. (Refer to Figure 32-3.)
When assembling components of the landing gear, lubricate bearings, bushings, and
friction surfaces with proper lubricant as described in Chapter 12.
1. Insert a gear support bearing in each support fitting and secure with snap rings. Check bearing for excess
end play, shim as necessary with shim washers (P/N 62833-44).
2. The gear housing may be installed in the wheel well of the wing by the following procedure:
A. Place spacer washer and then forward support fitting on forward arm of the housing. Determine that
barrel nut is properly positioned in the arm and insert attachment bolt through washer and the fitting
into the arm. Tighten bolt and ascertain that the bearing is free to rotate.
B. Position aft support fitting at its attachment point in the wheel well and secure with bolts, washers and
nuts. Install nuts and washers by reaching through the access hole on the underside of the wing.
C. With the retainer tube for the aft arm of the housing in hand, reach up through the access opening and
insert the tube into the support fitting through the hole in the web.
D. Position the gear housing up in the wheel well and install the forward support fitting with bolts and
washers. (One each AN960-416 and AN960-416L washer per bolt.)
E. Push the retainer tube into the arm of the housing and secure with bolt.
F. Check that the gear rotates freely in its support fittings and recheck thrust.
G. Connect the brake line to its mating line in the wheel well and bleed brakes.
3. The gear side brace link assembly may be installed by the following procedure:
A. Position link support bracket with swivel stud installed at its attachment point on the web of the spar
and secure with bolts and washers.
B. Ascertain that the upper and lower links are assembled with downlock hook, retraction fitting, c..
attached, and the through travel of the links and downlock hook clearance checked.
C. Attach the upper link to the swivel stud of the support fitting and secure with bolt, bushing, washer,
nut and cotter pin.
D. The actuating cylinder rod end bearing and lower side brace link may be attached respectively to the
retraction fitting and strut housing during the adjustment of the landing gear.
4. Ascertain that the landing gear is serviced per Chapter 12.
5. Check adjustment of landing gear.
6. Check alignment of the wheel.
7. Install the access plate on the underside of the wing and remove the airplane from jacks.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
— Note —
2G7
3 2 - 1 2 - 0 3
Page 32-15
Revised: May 15, 1989