Piper Cherokee Six Service Manual page 341

PIPER CHEROKEE SIX SERVICE MANUAL
3. Raise the gear by pushing up on the retraction fitting, thus disengaging
the
hooks, and pushing up on the pivot point at the bottom of the side brace links to bring the
links out of the locked position. Raise the gear until the fork presses lightly into the rubber
pad. Retain the gear in this position.
4. Loosen the jam nut on the piston rod of the actuating cylinder and turn the rod
end bearing in or out to allow a slip fit of the attachment bolt.
5. Install with the attachment bolt, bushing, spring swivel, and secure with washer
and nut. Install the gear downlock spring.
6. When the gear is to within .125 of an inch of correct adjustment, the rod end
need not be disconnected and therefore all that will be required is to loosen the jam nut,
place a wrench on the flat at the end of the piston rod and turn to obtain
correct
adjustment.
7. Check the rod end bearing for adequate thread engagement and tighten jam nut.
8. If the downlock limit switch is properly adjusted, retract and extend the gear
hydro-electrically to ascertain that the gear operates properly.
6A-26. ALIGNMENT OF MAIN LANDING GEAR. (Refer to Figure 6A-9.)
a. 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. Devise a support to hold the straightedge in this position.
b. 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.) 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 ± 1/2 degrees.
NOTE
A carpenter's square, because of its especially long legs, is
recommended
for checking
main
landing gear wheel
alignment.
c. 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.
d. To rectify the toe-in and 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 the Toe-in. Toe-out Correction Chart (Table VIA-III).
e. 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.
f.
Recheck wheel alignment. If the alignment is correct, safety the castellated nut with
cotter pin.
LANDING GEAR AND BRAKE SYSTEM
Issued: 7/28/75
2D17