ARMY TM 9-6115-673-13&P
AIR FORCE TO 35C2-3-512-1
a. Inspection.
(1) Shut down generator set.
(2) Release instrument panel by turning fastener, open instrument panel slowly.
(3) Visually inspect the generator control unit for security, cracks, broken wires, corrosion, and other
damage.
(4) Close and secure instrument panel.
b. Testing (MEP-531A).
(1) Shut down generator set.
(2) 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.
(3) Start generator set.
(4) Set multimeter to AC volts and connect positive lead of multimeter to terminal 5 on terminal board
TB1 and negative lead to terminal 6 of TB1. Multimeter should indicate 40-50 VAC. If reading is low,
dynamo is defective. Replace dynamo, refer to paragraph 5.23.b. If there is no voltage, check diesel
engine dynamo (G1) and wiring between dynamo and TB1, refer to paragraph 5.23.a. Then redo
step 4.
(5) Connect positive lead of multimeter to terminal 10 of TB1 and negative lead to terminal 1 of TB1.
Multimeter should indicate 119-121 VAC. If reading is incorrect, check wiring between CB1-A (Line)
and TB1. Then redo step 5.
(6) Set multimeter for DC volts and connect positive lead of multimeter to terminal 2 of TB1 and
negative lead to terminal 1 of TB1. Multimeter should indicate 35-45 VDC.
(7) Connect positive lead of multimeter to terminal 4 of TB1 and negative lead to terminal 1 of TB1.
Multimeter should indicate 35-45 VDC. If reading is incorrect, check LOP solenoid (L4) and wiring
between solenoid and TB1. Then redo step 7.
(8) Connect positive lead of multimeter to terminal 3 of TB1 and negative lead to terminal 1 of TB1.
Multimeter should indicate 18-22 VDC.
