Tire Balancer - Piper Navajo Chieftain PA-31-350 Service Manual

C476
NAVAJO CHIEFTAIN SERVICE MANUAL
The following list of materials were used In making the balancer:
3-
5
7
Figure 2-11. Tire Balancer
d.
When reassembling the wheel, powder the inside of the tire. Mount the tire on the valve side of
the wheel in the same position it was in the when it was balanced. Install the other wheel half, aligning the
chalk marks. Install the bolts and tighten to required torque, then air the tire and recheck the balance. The
wheel should not be more than 1/2 ounce out of balance.
2-38. CONSTRUCTION OF TIRE BALANCER. (Refer to Figure 2-11.)
a.
The following instructions will help in building the balancer: chamfer top edges of -3 sides,
leaving 1/16 inch flat on top inboard edge. Rivet -2 tee's to -3 sides using AN470-AD5 rivets 2" spacing.
Use AN426-AD5 rivets 2" center to center to secure -2 tee's to -1 base. If tee extrusion is unavailable, heavy
angle extrusion could be used. -3 sides must be paralled and vertical.
b.
The -4 axle must slide through the -8 pipe. The -5 nuts were made by reaming the existing threads
in the AN365-624 nuts with an R drill, then tapping with a 1/8-27 pipe tap.
c.
The -6 spacers were made from 1/2 inch aluminum tubing. The two lengths of spacers are suitable
for balancing most any aircraft wheel.
d.
The -7 bushing may be benchmade from one inch phenolic or aluminum using a 1 1 2 inch hole saw
to cut out the smaller bushing and a 1 3 4 hole saw to cut out the larger. By inserting a I 4 inch long threaded
bolt through the pilot hole and securing with a washer and nut. a drill press and file may be used to make the
off-set on the bushing. The turned-down part should just slide inside the bearing race. Ream the pilot hole
to slide over the -8 pipe threads.
e.
The -8 pipe was made from a piece of 1/8 inch black pipe and threaded with a 1/8-27 pipe die.
Thread 3 inches in from each end of the pipe.
Revised: 10/5/83
HANDLING AND SERVICING
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