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 486 of 991

TM 9-2320-272-24-2

3-426. 100-AMP ALTERNATOR REPLACEMENT

THIS TASK COVERS:

a. Removal

b. Installation

INITIAL SETUP:

APPLICABLE MODELS

All

TOOLS

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

MATERIALS/PARTS

Lockwasher (Appendix D, Item 354)

REFERENCES (TM)

TM 9-2320-272-10

TM 9-2320-272-24P

EQUIPMENT CONDITION

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

•

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

•

Left and right splash shields removed

(TM 9-2320-272-10).

•

Battery ground cables disconnected (para. 3-126).

•

Alternator drivebelts removed (para. 3-78).

a. Removal

1.

Disconnect harness connector (12) from alternator (11).

2.

Remove two nuts (9), washers (8), and screws (7) from alternator (11) and mounting bracket (10).

NOTE

Assistant will help support alternator.

3.

Remove screw (l), washers (4) and (3), lockwasher (2), and alternator (11) from adjusting arm (5).

Discard lockwasher (2).

4.

Remove alternator pulley (6) from alternator (11) (para. 3-73).

1.

Install alternator pulley (6) on alternator (11) (para. 3-73).

NOTE

Assistant will help support alternator.

2.

Install alternator (11) on adjusting arm (5) with new lockwasher (2), washers (3) and (4), and

screw (1).

3.

Install alternator (11) on mounting bracket (10) with two screws (7), washers (8), and nuts (9).

4.

Connect harness connector (12) to alternator (11).

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