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 570 of 1015

3-71. FAN

TM 9-2320-272-24-1

THIS TASK COVERS:

a. Removal

b. Installation

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

Torque wrench (Appendix E, Item 146)

Parking brake set (TM 9-2320-2722-10).

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

Right splash shield removed (TM 9-2320-272-10).

1.

Using a breaker bar in square drive hole (7) of belt tensioner (4), move belt tensioner (4) up.

NOTE

Assistant will help with step 2.

2.

Remove drivebelt (8) from alternator pulley (11), and release belt tensioner (4).

3.

Remove drivebelt (8) from vibration damper pulley (9), water pump pulley (10), and fan pulley (1).

4.

Remove two screws (6) and belt tensioner bracket (2) from thermostat housing (12).

5.

Remove screw (5) and belt tensioner (4) from bracket (2).

1.

Install belt tensioner bracket (2) on thermostat housing (12) with two screws (6).

2.

Align locating pin (3) on belt tensioner (4) with belt tensioner bracket (2) and install screw (5).

Tighten screw (5) 30 lb-ft (45 N•m).

3.

Install drivebelt (8) over fan pulley (1) and under vibration damper pulley (9).

4.

Install drivebelt (8) between water pump pulley (10) and belt tensioner (4).

NOTE

Assistant

will help with step 5.

5.

Using breaker bar in square drive hole (7) of belt tensioner (4), move belt tensioner (4) up and

install drivebelt (8) on alternator pulley (11). Release belt tensioner (4).

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