TM-9-2330-238-14

CHASSIS, SEMITRAILER: 6-TON, 4-WHEEL M295A1; SEMITRAILER, VAN: EXPANSIBLE, 6-TON, 4-WHEEL M313; SEMITRAILER, VAN: SHOP, FOLDING SIDES, 6-TON, 4-WHEEL M447 AND M447C; SEMITRAILER, VAN: REPAIR PARTS, SHOP EQUIPMENT, 6-TON, 4-WHEEL M749; SEMITRAILER, VAN: REPAIR PARTS STORAGE, 6-TON, 4-WHEEL M750

TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL

JULY 1992

TM-9-2330-238-14 - Page 173 of 462

TM 9-2330-238-14

4-37.

BLEEDING HYDRAULIC BRAKE SYSTEM (Con’t).

b .

PRESSURE FEED FILLER BLEEDING

1.

2.

3.

4.

5.

6.

7.

8.

Install pressure feed adapter in cap (4) hole in master cylinder (5). Connect air pressure hose to adapter.

NOTE

Air pressure should be maintained between 10-20 psi (69-138 kPa)

cylinder should contain a constant level of brake fluid during bleeding.

Clean bleeder valve (1) and install bleeder tube (2).

and master

Position opposite end of bleeder tube (2) in glass jar (3) partially filled with clean brake fluid.

CAUTION

Do not reuse brake fluid when refilling master cylinder. Use only clean brake fluid to

prevent contamination of brake system.

Loosen bleeder valve (1) 3/4 turn counterclockwise.

NOTE

Air in hydraulic brake system will appear as bubbles in the brake fluid when expelled

from tube.

Apply compressed air to master cylinder (5) and expel air from hydraulic brake system. Continue until air

bubbles in brake fluid stop.

Tighten bleeder valve (1) and shut off compressed air. Remove bleeder tube (2) from bleeder valve (1).

Remove air pressure hose and pressure feed adapter from cap (4) hole in master cylinder (5).

Replenish brake fluid in accordance with Chapter 3, Section i and install cap (4).

FOLLOW-ON TASKS:

• Uncouple

semitrailer from towing vehicle (para 2-11).

4-75