ARMY TM 9-6115-673-13&P
AIR FORCE TO 35C2-3-512-1
(8) With positive lead of multimeter connected to terminal 8 on TB1, move negative lead to
terminal 9 of TB1. Place ON-OFF load circuit breaker CB1 to ON. Then using load bank, apply a
load. Multimeter should indicate an increase until load stabilizes. If there is no increase, voltage
regulator is defective.
(9) Shut down generator set and disconnect load bank.
(10) Replace voltage regulator if any of above readings are not as stated.
(11) Close and secure instrument panel.
c. Testing (MEP-501A).
(1) Shut down generator set.
(2) Connect load bank to load terminals.
(3) Release instrument panel by turning fastener, open instrument panel slowly.
WARNING
High voltage is produced when this generator set is in operation. Use care
when working around an open control panel with the generator set
operating. Improper operation and/or failure to follow this warning could
result in personal injury or death by electrocution.
(4) Start generator set and turn VOLTAGE ADJ. potentiometer to verify adjustment range (26.6
to 32.2 VDC). If no voltage or low voltage was indicated on VOLTS DC meter, or voltage
adjustment range could not be achieved, continue with the following steps. Otherwise, voltage
regulator is serviceable.
If defective, replace
VOLTAGE ADJ. potentiometer and redo step (4).
(6) Set multimeter for DC volts and connect positive lead of multimeter to terminal 9 of TB1 and
negative lead to terminal 2 of TB1. Multimeter should indicate approximately 26.6 to 32.2 VDC.
(7) Set multimeter to DC volts and connect positive lead of multimeter to terminal 11 of TB1 and
negative lead to terminal 2 of TB1. Multimeter should indicate 12-16 VDC. If reading is incorrect,
repair/replace alternator and/or wiring. Then redo step (4).
(8) Connect positive lead of multimeter to terminal 10 on TB1 and negative lead to terminal 2 of
TB1. Place ON-OFF load circuit breaker CB1 to ON. Then using load bank, apply a load.
Multimeter should indicate an increase until load stabilizes. If no change is indicated, voltage
regulator is defective.
(9) Shut down generator set.
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