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 592 of 1015
TM 9-2320-272-24-1
THIS TASK COVERS:
a. Alternator and Mounting Bracket
Removal
b. Pulley Removal
c. Pulley Installation
d. Alternator and Mounting Bracket
Installation
e. Adjustment
APPLICABLE MODELS
M939A2
TOOLS
REFERENCES (TM)
TM 9-2320-272-10
TM 9-2320-272-24P
EQUIPMENT CONDITION
General mechanic’s tool kit (Appendix E, Item 1)
Torque wrench (Appendix E, Item 146)
Universal puller (Appendix E, Item 103)
Multimeter (Appendix E, Item 86)
Vise
Parking brake set (TM 9-2320-272-10).
Hood raised and secured (TM 9-2320-272-10).
Right splash shield removed (TM 9-2320-272-10).
Battery ground cables disconnected (para. 3-126).
Fan drivebelt removed (para. 3-71).
MATERIALS/PARTS
Two screw-aesembled lockwashers
(Appendix D, Item 587)
Lockwasher (Appendix D, Item 364)
Locknut (Appendix D, Item 282
Woodruff Key (Appendix D, Item 726)
Lockwasher (Appendix D, Item 403)
Lockwasher (Appendix D, Item 401)
Gasket sealant (Appendix C, Item 30)
GENERAL SAFETY INSTRUCTIONS
Alternator is heavy. Use assistant when replacing
alternator.
1.
Remove screw (16) and washer (15) from alternator link (14).
2.
Loosen two screws (2) and pivot alternator (1) upward to access terminal cover (23).
3.
Remove two screw-assembled lockwashers (24) and terminal cover (23) from alternator (1). Discard
screw-assembled lockwashers (24).
NOTE
Sealant must be removed before removing wires.
Tag all leads for installation.
4.
Remove screw (22), lockwasher (21), and wire (27) from alternator (1). Discard lockwasher (21).
5.
Remove nut (20), lockwasher (19), and wire (26) from alternator (1). Discard lockwasher (19).
6.
Remove nut (18), lockwasher (17), and wire (25) from alternator (1). Discard lockwasher (17).
7.
Disconnect wire (28) from connector (29).
Alternator is heavy. Assistant will help with alternator removal.
Failure to do so may result in injury to personnel.
8.
Remove two screws (2), washers (3), and alternator (1) from brackets (4) and (6). Move bracket (4) to
one side.
9.
Remove four screws (7) and bracket (6) from engine (5).
10.
Remove screw (12), washer (13), and alternator link (14) from engine (5).
3-228
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