Tire Balancer Building Instructions; Tire Balancer Fixture View - Piper PA-44-180 SEMINOLE Maintenance Manual

9.375
3
2
1
8
5
6
7

TIRE BALANCER BUILDING INSTRUCTIONS.

1. Chamfer top edges of -3 sides, leaving 1/16 inch flat on top inboard edge. Rivet -2 tee's to -3 sides using
AN 470-ADS rivets 2" spacing. Use AN 426-ADS 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 vertical.
2. The -4 axle must slide through the -8 pipe. The -5 nuts were made by reaming the existing threads in the
AN 365-624 nuts with an R drill, then tapping with a 1/8-27 pipe tap.
3. The -6 spacers were made from 1/2 inch aluminum tubing. The two lengths of spacers are suitable for
balancing most any aircraft wheel.
4. The -7 bushings may be made 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 1/4 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.
5. 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.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
The following list of materials were used in making the balancer:
-1
-2
-3
-4
-5
-6
-7
-8
*
7
6
5
4
Figure 91-1. Tire Balancer Fixture
1 ea. Base 12 x 11
2 ea. Tee 2.5 x 2 x 11
2 ea. Sides 14 x 11
1 ea. Axle 0.125 x 10.25
2 ea. Nuts AN 365-624
2 ea. Spacer 0.50 x 2.25
2 ea. Spacer 0.50 x 1.25
2 ea. Bushing 1.480 x 1.625 x 1.00
2 ea. Bushing 2.240 x 1.37 x 1.00
1 ea. Pipe 1/8 x 9.3
2 ea. Bearings Save two of each size worn wheel bearing from
previous inspections.
4B1
0.190 2024 T3 clad aluminum alloy
0.190 2024 T4 extruded aluminum alloy
0.125 2024 T3 clad aluminum alloy
4130 Steel, normalized
5052-0 aluminum tubing
5052-0 aluminum tubing
phenolic or aluminum
phenolic or aluminum
black steel pipe
9 1 - 0 4 - 0 0
Page 91-06
Revised: May 15, 1989