TM-9-2320-272-24-2

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 2 OF 4

JUNE 1998

TM-9-2320-272-24-2 - Page 640 of 991

TM 9-2320-272-24-2

3-458. WHEEL VALVE FILTER REPLACEMENT

THIS TASK COVERS:

a. Removal

b. Installation

INITIAL SETUP:

APPLICABLE MODELS

REFERENCES (TM)

M939A2

TM 9-2320-272-10

TOOLS

TM 9-2320-272-24P

General mechanic’s tool kit (Appendix E, Item 1)

EQUIPMENT CONDITION

MATERIALS/PARTS

●

Parking brake set (TM 9-2320-272-10).

●

Air reservoirs drained (TM 9-2320-272-10).

Filter (Appendix D, Item 122)

O-ring (Appendix D, Item 437)

Two locknuts (Appendix D, Item 334)

GENERAL SAFETY INSTRUCTIONS

Eyeshields must be worn when releasing

compressed air.

a. Removal

WARNING

Air system components are subject to high pressure. Always

relieve pressure before loosening or removing air system

components.

NOTE

Replacement of wheel valve filter is the same for front and rear

wheel valves. This procedure is for front wheel valves.

1.

Remove cap (2) and valve stem (3) from wheel valve (4) and allow tire (10) to deflate completely

2.

Remove two locknuts (14), washers (13), screws (15), washers (16), shield (1), and spacer (12) from

studs (9) and axle flange (11). Discard locknuts (14).

3.

Disconnect hose (8) from elbow (7).

4.

Remove elbow (7), O-ring (6), and filter (5) from wheel valve (4). Discard O-ring (6) and filter (5).

b. Installation

1.

Install new filter (5), new O-ring (6), and elbow (7) on wheel valve (4).

2.

Connect hose (8) to elbow (7).

3.

Install spacer (12) and shield (1) on studs (9) and axle flange (11) with two washers (16),

screws (15), washers (13), and new locknuts (14)

4.

Install valve stem (3) and cap (2) on wheel valve (4).

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