TM 9-2320-280-34
This task covers:
a. Alternator Output Testing
d. Cleaning
b. Disassembly
e. Assembly
c. Static Testing
INITIAL SETUP:
Applicable Models
Personnel Required
M996, M996A1, M997, M997A1
One mechanic
One assistant
Tools
Manual References
General mechanic's tool kit:
TM 9-2320-280-20
automotive (Appendix G, Item 1)
TM 9-2320-280-24P
Puller (Appendix G, Item 136)
TM 9-4910-663-12
Test Equipment
TM 9-4910-485-12
Multimeter (Appendix G, Item 120)
Equipment Condition
Test stand (Appendix G, Item 94)
Alternator removed (TM 9-2320-280-20).
Materials/Parts
General Safety Instructions
Nine locknuts (Appendix E, Item 76)
Always support alternator core and shaft
Locknut (Appendix E, Item 66)
assembly during removal and installation.
Six lockwashers (Appendix E, Item 90)
Nine locknuts (Appendix E, Item 68)
Maintenance Level
Four lockwashers (Appendix E, Item 109)
Direct support
Sealing compound (Appendix B, Item 51)
Sealing compound (Appendix B, Item 54)
Sealing compound (Appendix B, Item 55)
Sealant (Appendix B, Item 43)
a. Alternator Output Testing
1.
Mount pivot arm of 500 amp test stand to high-speed side and screw mounting flange adapter to
pivot arm, and connect pulley drive shaft to high-speed head. Screw pulley drive shaft to mounting
flange adapter.
2.
Mount alternator to starter/alternator mounting bracket on 500 amp test stand, and connect V-belt
from 500 amp test stand pulley to alternator pulley. Adjust belt tension.
3.
Connect cable from alternator ground terminal to 500 amp test stand G- terminal. Connect cable
from alternator "Bat" terminal to 500 amp test stand G+ terminal. Connect cable from alternator
regulator IGN to 500 amp test stand F terminal.
4.
Make a jumper wire with a ring terminal at both ends. Connect jumper wire on 500 amp test stand
from IGN SWITCH terminal to F-B terminal.
NOTE
Prior to operation of the test stand, ensure all switches and controls
are in the "initial" positions as referenced in Operator and
Maintenance Manual, TM 9-4910-663-12 (UMC Model GSAR-500), or
Operator and Maintenance Manual, TM 9-4910-485-12 (Sun Model
AGT-99A).
Model AGT-99A
5.
Set 500 amp test stand as follows:
Model GSAR-500
(a) DC ammeter load and starter selector
X10
500 amp
(b) DC ammeter field and battery charge selector
X1
5 amp
(c) Field circuit switch
Regulator
Regulator
(d) DC voltmeter circuit selector
RECT/GEN
RECT/GEN
Change 2
