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 238 of 951
4-5.13. (6.5L) 400 AMPERE DUAL VOLTAGE ALTERNATOR (12446760) REPLACEMENT
This task covers:
a. Removal
b. Installation
NOTE
Prior to removal, tag leads for installation.
1. Position 3/8-in. breaker bar on belt tensioner (4), move tensioner (4) clockwise, and remove
drivebelt (1) from power steering pump pulley (3) and alternator pulley (2).
2. Remove nut (5), lockwasher (6), washer (7), ground strap (8), and washer (10) from stud (9). Discard
lockwasher (6).
WARNING
Alternator must be support during removal and installation.
Failure to do so may cause injury to personnel or damage to
equipment.
3.
Remove screw (12), lockwasher (13), and washer (14) from alternator bracket (17) and alternator
mounting bracket (11). Discard lockwasher (13).
4.
Remove screw (15), washer (16), and bracket (17) from alternator (18) and alternator mounting
bracket (11).
5.
Remove nut (24), lockwasher (23), washer (22), screw (19), washer (20), and alternator (18) from
alternator support bracket (21) and alternator mounting bracket (11). Discard lockwasher (23).
6.
Remove alternator pulley (2) (para. 4-3).
1.
Install alternator pulley (2) (para. 4-3).
2.
Position alternator (18) on alternator mounting bracket (11).
3.
Install alternator (18) on alternator mounting bracket (11) and alternator support bracket (21)
with washer (20), screw (19), washer (22), lockwasher (23), and nut (24). Do not tighten nut (24).
4.
Install alternator bracket (17) on alternator mounting bracket (11) and alternator (18) with
washer (16) and screw (15). Do not tighten screw (15).
5.
Install washer (14), lockwasher (13), and screw (12) on alternator mounting bracket (11) and
alternator bracket (17).
6.
Tighten screw (15) to 40 lb-ft (54 N
•
m).
7.
Tighten nut (24) to 155 lb-ft (210 N
•
m).
8.
Install ground strap (8) on stud (9) with washers (10) and (7), lockwasher (6), and nut (5).
9.
Position 3/8-in. breaker bar on belt tensioner (4) and move tensioner (4) clockwise and install
drivebelt (1) on power steering pump pulley (3) and alternator pulley (2).
b. Installation
a. Removal
INITIAL SETUP:
Tools
General mechanic’s tool kit:
automotive (Appendix B, Item 1)
Maintenance and repair shop equipment:
automotive (Appendix B, Item 2)
Materials/Parts
Lockwasher (Appendix G, Item 191)
Lockwasher (Appendix G, Item 133)
Lockwasher (Appendix G, Item 151)
Personnel Required
One mechanic
One assistant
Manual References
TM 9-2320-280-10
TM 9-2320-280-24P
Equipment Condition
• Hood raised and secured (TM 9-2320-280-10).
• Battery ground cables disconnected (para. 4-73).
• Engine access cover removed (para. 10-15).
• Alternator cables removed (para. 4-5.12).
General Safety Instructions
Alternator must be supported during removal and
installation.
4-12.38
Change 3
TM 9-2320-280-20-2
Back to Top
