6-3.2. 100 AMPERE ALTERNATOR (12342944) TESTING AND REPAIR
This task covers:
c. Static Testing
M996, M996A1, M997, M997A1
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, and 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, and 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, 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
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