Sonex Wheel and Brake Assembly Installation Instructions

Sonex Aircraft

LLC

.

© 2006 All Rights Res

erved.

www.sonexaircraft.com

Wheel and Brake Assembly and Installation

1. The wheel halves must mate together without a gap. If a

he stamped Azusa brake drums are typically

brake drum, part number ACV-W01-10. These steel brake

help prevent brake fade.

not always fi t fl ush against the face of the wheels. Placing the

Above: Flash on the bolt hole will prevent the wheel halves

from seating.

2. Insert all three bolts

bolts must pass through

bore, the bolt holes must

be redrilled with a 21/64"

smooth. If it is not,

bolts. If the bolts

holes in the brake drums can be updrilled with a 23/64" or

1

1

1

2

© 2006 All Rights Res

www.sonexaircraft.com

Wheel and Brake Assembly and Installation

Assembling the Wheels

wheels can be assembled with the tires and tubes.

a. Dust the inside of the tire and the outside of the tube with

baby powder

b. Install the wheel assembly bolts with the heads against the

brake drums and the nuts on the outside of the wheel.

c. Before tightening the bolts, make sure the axle bore is in

proper alig

nment. If a "step" is noted between the wheel

halves

redrill the bolt holes so proper alignment can be achieved.

d. Slightly infl ate the inner tube and then release the air.

e. Infl ate the tubes to approximately 50 psi. 30 psi provides

nched tu

be if fl ying off a hard surface runway.

f. Grease and install the wheel bearings. Use a high-quality

bearing grease.

use white lithium grease.

shoes and backing plates. The shoes are held in place

with spring tension.

1. Remove the brake pads from the backing plate

2. Remove the brake actuating cam from the backing plate.

3. Round all four corners of the cam with a fi le. Be sure to

round all corn

cover the brake backing

plate. The brake drum will

plate and the brake drum.

being mounted perpendicular to the axle. This is easy to check

by placing a small draftsman's triangle against the axle in the

plate with a mallet to square it to the axle.

Wheels on the Axles

5. Lightly grease the lobes of the cam and re-install the

brake shoes.

Round the cam lobes to achieve smooth br

plication.

supposed to cover the brake