TM-9-2320-272-24-1

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

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4

JUNE 1998

TM-9-2320-272-24-1 - Page 525 of 1015

3-55. AIR

TM 9-2320-272-24-1

1.

Loosen flare nut (16) and disconnect coolant return tube (12) from engine oil cooler elbow (18).

2.

Remove nut (13), lockwasher (14), washer (15), screw (8), washer (9), and coolant return tube

clamp (10) from bracket (11). Discard lockwasher (14).

3.

Loosen flare nut (20) and remove coolant return tube (12) from elbow (22).

4.

Remove bushings (21) and (17) from coolant return tube (12). Discard bushings (17) and (21).

5.

Remove elbows (18) and (22) from engine oil cooler (19) and air compressor (23).

1.

Inspect flare nuts (20) and (16), adapter (7), elbow (2), and coolant supply tube (6) for cracks and

stripped threads. Replace parts if cracked or are damaged threads. Refer to TM 9-243 for fabrication

of supply tube (6).

2.

Inspect tubing (12) for cracks and severe bends. Discard tubing (12) if cracked or badly bent.

Refer to TM 9-243 for fabrication of tubing.

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