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 182 of 462

b.

TM 9-2330-238-14

4-41. MASTER CYLINDER AND AIRBRAKE CHAMBER MAINTENANCE.

This Task Covers:

Air Chamber Leakage Test

c.

Installation

Removal

Initial Setup:

Equipment Conditions:

Materials/Parts:

●

Semitrailer coupled to towing vehicle (para 2-10).

●

Brake fluid (Item 3, Appendix E)

●

Dishwashing compound (Item 6, Appendix E)

Tools/Test Equipment:

●

Rags (Item 11, Appendix E)

●

General mechanic’s tool kit

●

Antiseizing tape (Item 16, Appendix E)

●

Six Iockwasher

Personnel Required:

Two

I

a.

AIR CHAMBER LEAKAGE TEST

1.

With brakes applied, coat pressure side of

airbrake chamber (1) with soap and water.

2.

3.

Inspect airbrake chamber (1) for bubbles, which

indicate leakage. If leakage

is

detected, tighten

flange nuts (2) evenly until leakage stops.

Coat holes on non-pressure side of airbrake

chamber (1) with soap and water and inspect for

leakage, If leakage is detected, replace airbrake

chamber.

b.

REMOVAL

1.

Uncouple semitrailer from towing vehicle (para 2-11).

2.

Open draincock on air reservoir and release air pressure.

3.

Disconnect air line (12) from elbow (11) in airbrake chamber (1).

TA701986

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