TM-9-2920-258-30-P
ALTERNATOR, 180 AMPERES, MODEL 5520AB
TECHNICAL MANUAL; DIRECT SUPPORT MAINTENANCE MANUAL
APRIL 1989
TM-9-2920-258-30-P - Page 64 of 76
TM 9-2920-258-30&P
NOTE
Ž The voltage has to be adjusted to 28 volts when any part of a load is added. Check the AC ammeter.
While watching the AC ammeter, rotate the phase select switch through A, B and C positions. There
should be no more than a 1-ampere difference between each phase.
• Check the AC voltmeter. While watching the AC voltmeter, rotate the select switch through the T1, T2;
T1, T3; and T2, T3 positions. There should be no more than l-volt difference between each circuit.
10
Using a multimeter, place the red lead on terminal “ac” and ground the black lead. Check for 12-
16 volts AC.
11
If the Alternator meets the above requirements,
it is serviceable.
e
Test Stand Shutdown
CAUTION
Do not turn master load switch OFF first as damage to equipment may result.
1
Turn the ignition switch OFF.
2
Turn the master load switch OFF.
3
Turn the battery switch OFF.
4
Reduce test stand speed to 1000 rpm.
5
Depress the STOP button.
6
Return all switches and controls to the base setting.
7
Remove the Alternator and regulator from the test stand.
8
Place all leads in the storage compartment of the test stand.
D-16
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