6-5. 200 AMPERE ALTERNATOR (12338796-1) TESTING AND REPAIR
This task covers:
c. Static Testing
M996, M996A1, M997, M997A1, M997A2
General mechanic's tool kit:
Alternator removed (TM 9-2320-280-20).
General Safety Instructions
Always support alternator core and shaft
assembly during removal and installation.
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
Mount alternator to starter/alternator mounting bracket on 500 amp test stand. Connect "V" belt
from 500 amp test stand pulley to alternator pulley. Adjust belt tension.
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.
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.
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).
Set 500 amp test stand as follows:
(a) DC ammeter load and starter selector
(b) DC ammeter field and battery charge selector
(c) Field circuit switch
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.