Cleaning, Inspection and Repair. - TM-10-3930-631-340052

TM 10-3930-631-34

bore with large end of spring towards cylinder outlet.

install brakemaster cylinder, fill cylinder and bleed brake

(3) Depress spring and place cup (12) and

system.

piston assembly (11) in bore. Hold spring depressed

4-6. Wheel Cylinder

and install stop (10) and secure parts in bore with lock

a. Removal. Refer to TM 10-3930-631-12 and

(9).

remove the wheel cylinder.

(4) Install fittings (3 and 5) and new gaskets (4

b. Disassembly.

and 6) at body outlet. Install filler cap (1) and new gasket

(1) Remove boots (3, fig. 4-6) and push pistons

(2).

(4), cups (5) and spring (6) from body.

(5) Install boot (8) and push rod (7).

(2) Remove bleed screw (7) from body.

e. Installation. Refer to TM 10-3930-631-12 to

Screw

Cup

Lock washer

Spring

Boot

Bleed screw

Piston

Body

Figure 4-6. Wheel cylinder, exploded view.

Cleaning, Inspection and Repair.

diameter of more than 1.507 inches (38.3 mm), replace

body.

(1) Wash parts thoroughly in denatured alcohol

(d) After honing, wash body in warm water and

or clean brake fluid. Do not use mineral base solvents

soap solution.

which will deteriorate rubber parts.

(e) Rinse body in clean warm water and blow

(2) Inspect bore of cylinder body. If bore is

dry with compressed air. After drying immediately

scratched, pitted or marked, remove imperfections by

immerse body in clean hydraulic brake fluid.

honing as follows:

(3) Inspect all parts for wear, corrosion and

(a) Secure body securely in a bench vise.

damage. Replace all unserviceable parts. Install all new

(b) Coat cylinder bore with hydraulic fluid. Hone

parts contained in repair kit for cylinder.

body as necessary, removing material in single passes.

d. Assembly.

Remove hone and inspect bore after each pass.

(1) Lubricate all parts and cylinder walls with

Remove only enough material to recondition cylinder

hydraulic fluid.

bore.

4-9