TM-9-2320-280-20-2
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 2 OF 3
JANUARY 1996
TM-9-2320-280-20-2 - Page 195 of 951
4-3. ALTERNATOR PULLEY REPLACEMENT
This task covers:
a. Removal
b. Installation
a. Removal
1.
Clamp alternator pulley (2) in a soft-jawed vise.
2.
Remove locknut (4) and washer (3) from alternator shaft (6). Discard locknut (4).
3.
Remove alternator (1) and pulley (2) from soft-jawed vise.
4.
Using a mechanical puller, remove pulley (2) and woodruff key (5) from alternator (1). Discard
woodruff key (5).
NOTE
The removal and installation procedure for 60 amp, 100 amp, and
200 amp alternator pulleys are identical.
INITIAL SETUP:
Tools
General mechanic’s tool kit:
automotive (Appendix B, Item 1)
Mechanical puller (Appendix B, Item 167)
Vise inserts (Appendix B, Item 170)
Materials/Parts
Locknut (Appendix G, Item 73)
(60, 100 amp only)
Woodruff key (Appendix G, Item 321)
(60, 100 amp only)
Locknut (Appendix G, Item 73.1)
(200 amp - Niehoff)
Woodruff key (Appendix G, Item 322)
(200 amp - Niehoff)
Manual References
TM 9-2320-280-24P
Equipment Condition
• 60 amp alternator removed (para. 4-2).
• 100 amp alternator removed (para. 12-23 or
12-24).
• 200 amp alternator removed (para. 4-109 or
4-110).
b. Installation
1.
Position woodruff key (5) in alternator shaft (6) with flat side up.
2.
Align pulley keyway (7) with woodruff key (5) in alternator shaft (6) and tap pulley (2) onto
shaft (6).
3.
Install washer (3) and locknut (4) on shaft (6). Tighten locknut (4) finger-tight.
4.
Clamp pulley (2) in soft-jawed vise.
NOTE
For 200 amp alternators (12447109 or 12338796-1), tighten
locknut to 115-125 lb-ft (156-169 N
•
m).
5.
Tighten locknut (4) to 95 ± 5 lb-ft (129 ± 7 N
•
m).
6.
Remove pulley (2) and alternator (1) from vise.
TM 9-2320-280-20-2
4-8
Change 3
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