TM-9-2320-280-34
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
JANUARY 1996
TM-9-2320-280-34 - Page 381 of 1258
This task covers:
a.
Alternator Output Testing
d.
Cleaning
b.
Disassembly
e.
Assembly
c.
Static Testing
a. Alternator Output Testing
1.
Mount 500-amp test stand pivot arm to high-speed side and install mounting flange adapter on pivot
arm. Connect pulley driveshaft to high-speed head. Install pulley driveshaft on mounting flange
adapter.
2.
Position adapter mount (1) to bracket (9) on test stand.
3.
Install adapter mount (1) on bracket (9) with washer (3), screw (2), washer (3), and nut (8).
Do not
tighten screw (2).
4.
Loosen locking handle (10) on bracket (9), raise bracket (9) to highest point, and tighten locking
handle (10).
5.
Install support plate (4) on adapter mount (1) with two washers (5), screws (6), washers (5), and
nuts (7). Do not tighten nuts (7).
6.
Install two V-belts (11) on driver pulley (12) on alternator/generator/starter test stand.
7.
Position alternator (25) on adapter mount (1) and install two V-belts (11) on pulley (15).
8.
Position two washers (22) between rear lower mount (24) on alternator (25) and adapter mount (1),
and install washer (21), screw (23), washer (21), and nut (20). Do not tighten nut (20).
9.
Align front lower mount holes (16) on alternator (25) and adapter mount (1) and install washer (18),
screw (19), washer (18), and nut (17). Do not tighten nut (17).
10.
Align top mount hole (26) on alternator (25) and adapter mount (1) and install two washers (13) and
screw (14).
11.
Tighten nuts (20) and (17) to 40 lb-ft (54 N
•
m).
INITIAL SETUP:
Applicable Models
M996, M996A1, M997, M997A1, M997A2
Tools
General mechanic’s tool kit:
automotive (Appendix G, Item 1)
Puller (Appendix G, Item 136)
Test Equipment
Multimeter (Appendix G, Item 120)
Test stand (Appendix G, Item 94)
Materials/Parts
RTV sealant (Appendix B, Item 43)
Silicone compound (Appendix B, Item 57)
Locknut (Appendix E, Item 65.2)
Locknut (Appendix E, Item 63)
Eighteen locknuts (Appendix E, Item 65.1)
Twelve locknuts (Appendix E, Item 65)
Twelve lockwashers (Appendix E, Item 92.1)
Two lockwashers (Appendix E, Item 88)
Two seals (Appendix E, Item 148.2)
Personnel Required
One mechanic
One assistant
Manual References
TM 9-2320-280-20
TM 9-2320-280-24P
TM 9-4910-663-12
TM 9-4910-485-12
Equipment Condition
Alternator removed (TM 9-2320-280-20).
General Safety Instructions
Always support alternator core and shaft assembly
during removal and installation.
Maintenance Level
Direct support
TM 9-2320-280-34
6 - 4 4 . 1 2
Change 1
6 - 5 . 2 . 400 AMPERE DUAL VOLTAGE ALT E R N ATOR (12469057) TESTING AND REPA
I R
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