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 588 of 1015
3-79. 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)
MATERIALS/PARTS
Two screw-assembled lockwashers
(Appendix D, Item 587)
Five lockwashers (Appendix D, Item 354)
Two lockwashers (Appendix D, Item 376)
Two locknuts (Appendix D, Item 281)
Lockwasher (Appendix D, Item 401)
Lockwasher (Appendix D, Item 403)
Tiedown strap (Appendix D, Item 684)
Lockwasher (Appendix D, Item 364)
Gasket sealant (Appendix C, Item 30)
REFERENCES (TM)
TM 9-2320-272-10
TM 9-2320-272-24P
EQUIPMENT
DESCRIPTION
Parking brake set (TM 9-2320-272-10).
Battery ground cables disconnected (para. 3-126).
Alternator drivebelts removed (para. 3-78).
GENERAL SAFETY INSTRUCTIONS
Alternator is heavy. Use assistance when replacing
alternator.
1. Remove two screw-assembled lockwashers (5) and terminal cover (4) from alternator (10). Discard
screw-assembled lockwashers (5).
2.
Remove two screws (3), lockwashers (2), and wire retaining strap (1) from alternator (10). Discard
lockwashers (2).
NOTE
Sealant must be removed before removing wires.
Tag all wires for installation.
3.
Remove screw (15), lockwasher (14), and wire (13) from alternator (10). Discard lockwasher (14).
4.
Remove nut (19), lockwasher (18), washer (17), and wire (16) from alternator (10). Discard
lockwasher (18).
5.
Remove nut (6), lockwasher (7), washer (8), and wire (9) from alternator (10). Discard lockwasher (7).
6.
Disconnect connector (11) from alternator (10).
7.
Remove and discard tiedown strap (12).
Alternator is heavy. Assistant will help with alternator removal.
Failure to do so may result in injury to personnel.
8.
Remove screw (32), lockwasher (20), washers (21) and (22), screw-assembled washer (23), and
adjusting link (31) from alternator (10). Discard lockwasher (20).
9.
Remove two locknuts (24), washers (25), screws (30), and alternator (10) from mounting bracket (26).
Discard locknuts (24).
10.
Remove four screws (29), lockwashers (28), and mounting bracket (26) from engine (27). Discard
lockwashers (28).
3-224
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