Section V. HAND BRAKE SHOES

TM 10-3930-632-34

pushes the brake linings into contact with the brake

11-15.

Cleaning and Inspection

drums to slow and stop the vehicle.

Discard the boots and cups.

Clean all parts of the wheel cylinder with

11-13.

Removal

denatured alcohol; dry thoroughly.

Remove the wheel cylinders (para 11-22).

Inspect the cylinder for scoring, pits, burrs, or

wear by holding the cylinder up to a strong light and

11-14.

Disassembly

looking through it; replace the cylinder if damaged.

Inspect all other parts of the wheel cylinder for

Refer to figure 11-4 and disassemble the wheel

cracks, breaks, distortion, burrs, scoring, or other

cylinder.

damage: replace damaged parts.

Remove any cleaning residue with crocus

cloth or jeweler's rouge.

Check for proper clearance between the piston

and cylinder by sliding the piston into the cylinder and

checking with a feeler gage. Replace the cylinder

assembly if clearance exceeds 0.005 inch.

11-16.

Reassembly

Refer to figure 11-4 and reassemble the wheel

cylinder. Lubricate internal parts of the wheel cylinder

with hydraulic brake fluid during reassembly.

11-17.

Installation

Install the wheel cylinder (para 11-24).

Boot

Spring

Bleed the brake system and adjust the brakes

Piston

Cylinder

(TM 10-3930-632-12).

Cup

Figure 11-4. Wheel Cylinder, Exploded View.

Section V. HAND BRAKE SHOES

11-18.

General

11-19.

Removal and Disassembly

Remove right side tilt cylinder (TM 10-3930-

The parking brake drum is a V-pulley keyed to the

driven end of the pinion shaft of the transmission. The

632-12).

brake shoe is a V-shaped block which is pressed into the

Disconnect the hand brake linkage from the

V of the pulley as the brake is applied. This prevents

arm and shaft assembly (TM 10-3930-632-12).

rotation of the transmission pinion shaft, preventing

Refer to figure 11-5 and remove and

movement of the vehicle. The lever that operates the

disassemble the parking brake assembly from the torque

brake shoe is designed to multiply the application force

converter housing.

of the brake by a leverage factor.

Change 1 11-5