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 574 of 1015

3-73. FAN

TM 9-2320-272-24-1

THIS TASK COVERS:

a. Removal

b. Inspection

c. Installation

APPLICABLE

MODELS

EQUIPMENT CONDITION

M939/A1

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

TOOLS

Primary and secondary air tanks drained

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

(TM 9-2320-272-10).

Hood raised and secured (TM 9-2320-272-10).

MATERIALS/PARTS

Coolant drained below water manifold level

(para. 3-53).

Cap and plug set (Appendix C, Item 14)

Antiseize tape (Appendix C, Item 72)

GENERAL SAFETY INSTRUCTIONS

REFERENCES (TM)

TM

9-2320-272-10

TM 9-2320-272-24P

Do not disconnect air lines or hoses before draining

air reservoirs.

Do not disconnect air lines or hoses before draining air reservoirs.

Small parts under pressure may shoot out with high velocity,

causing injury to personnel.

1.

Disconnect air hose (3) from adapter (4) on fan drive clutch actuator (5).

2.

Remove adapter (4) from fan drive actuator (5).

3.

Remove actuator-to-fan hose (2) from adapter (6).

4.

Remove adapter (6) from actuator (5).

5.

Remove actuator (5) from water manifold (1).

Inspect all connections for cracks and stripped threads. Replace any parts with cracks, or stripped or

damage threads.

NOTE

Male pipe threads must be wrapped with antiseize tape before

installation.

1.

Install actuator (5) on water manifold (1).

2.

Install adapter (6) on actuator (5).

3.

Connect actuator-to-fan hose (2) on adapter (6).

4.

Install adapter (4) in actuator (5).

5.

Connect air hose (3) to adapter (4).

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