Piper Arrow IV, Maintenance Manual

Page: 377 / 752

ALIGNMENT OF MAIN LANDING GEAR.
l. Place a straightedge no less than twelve feet long across the front of both main landing gear wheels.
Butt the straightedge against the tire at the hub level of the landing gear wheels. Jack the airplane up just high
enough to obtain a six and one-half inch dimension between the centerline of the strut piston and the centerline
of the center pivot bolt of the gear torque links. (Refer to Figure 32-3a.) Devise a support to hold the
straightedge in this position.
2. Set a square against the straightedge and check to see if its outstanding leg bears on the front and rear
side of the brake disc. (It may be necessary to remove the brake assembly to have clear access to the disc.)
(Refer to Figure 32-3a.) If it touches both forward and rear flange, the landing gear is correctly aligned. The
toe-in for the main landing gear wheels is 0 ± l/2 degrees.
—NOTE—
A carpenter’s square, because of its especially long legs, is
recommended for checking main landing gear wheel alignment.
3. If the square contacts the rear side of the disc, leaving a gap between it and the front flange, the wheel
is toed-out. If a gap appears at the rear flange, the wheel is toed-in.
4. To rectify the toe-in or toe-out condition, remove the bolt connecting the upper and lower torque links
and remove or add spacer washers to move the wheel in the desired direction. Refer to Chart 3203.
5. Should a condition exist that all spacer washers have been removed and it is still necessary to move the
wheel further in or out, then it will be necessary to turn the torque link assembly over. This will put the link
connecting point on the opposite side allowing the use of spacers to go in the same direction.
6. Recheck wheel alignment. If the alignment is correct, safety the castellated nut with cotter pin.
7. If a new link on the top left main gear had to be installed or it had to be reversed during the alignment
check, it will be necessary to check the gear safety switch (squat switch) bracket for engagement and locking
in place. If the large machine surface of the link is inboard, the bracket is mounted with the small rivet hole
next to link. (Refer to Sketch “A,” Figure 32-3a.) This should be aligned on the centerline of link and hole
drilled to .096 of an inch, .15 of an inch deep. Insert an MS20426AD3-3 rivet in the hole. This locking rivet is
held in place by the flat washer, castellated nut and cotter pin. If link has to be reversed, then the bracket and
bolt are also reversed. (Refer to Sketch “B,” Figure 32-3a.)
8. Check adjustment of landing gear safety switch (squat switch) per Adjustment of Landing Gear Safety
Switch (Squat Switch).
REMOVAL OF MAIN GEAR DOOR ASSEMBLY.
1. With the landing gear extended, disconnect the door retraction rod from the door by removing nut,
washers and bolt.
2. Remove the door from the wing panel by bending the door hinge pin straight and from the other end
pulling out the pin.
3. The door retraction rod may be removed from the gear housing by cutting the safety wire and
removing the attachment bolt and washer. Note the number of washers between rod end bearing and housing.
32-10-09
Page 32-19
Revised: August 17, 1982
2E2
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL