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, M997A2
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
Sealing Compound (Appendix B, Item 57)
Always support alternator core and shaft
Sealant (Appendix B, Item 43)
assembly during removal and installation.
Locknut (Appendix E, Item 81)
Three lockwashers (Appendix E, Item 111)
Maintenance Level
Eighteen locknuts (Appendix E, Item 68)
Direct support
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. Connect pulley drive shaft to high speed head. Screw pulley drive shaft to mounting
flange adapter.
Mount alternator to starter/alternator mounting bracket on 500 amp test stand. Connect "V" belt
2.
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, make certain that 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
6.
Turn 500 amp test stand master power switch and master load switch to "ON" and battery switch
to 24V DC. Green lamp on 500 amp test stand must illuminate.
Change 2
