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 596 of 1015

3-81. ALTERNATOR

TM 9-2320-272-24-1

THIS TASK COVERS

a. Removal

b. Installation

APPLICABLE MODELS

M939/A1

TOOLS

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

Torque wrench (Appendix E, Item 144)

Universal puller (Appendix E, Item 103)

Vise

MATERIALS/PARTS

Locknut (Appendix D, Item 282)

Woodruff key (Appendix D, Item 726)

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).

Alternator removed (para. 3-79).

1.

Position alternator pulley (1) in vise.

2.

Remove locknut (3) and washer (2) from pulley shaft (5). Discard locknut (3).

3.

Remove alternator pulley (1) from vise.

4.

Using universal puller, remove alternator pulley (1) and woodruff key (4) from pulley shaft (5). Discard

woodruff key (4).

1.

Install new woodruff key (4) in groove of pulley shaft (5) with flat edge up.

2.

Install pulley (1) on pulley shaft (5) with keyway (6) on woodruff key (4).

3.

Place alternator pulley (2) in vise.

4.

Install washer (2) and new locknut (3) on pulley shaft (5). Tighten locknut (3) 90-95 lb-ft

(122- 128 N•m).

3-232