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TM 9-2320-364-20-4
7-27
(2)
Remove four screws (6), lockwashers (7), washers (8) and DUVAC cover (9). Discard lockwashers.
(3)
Connect multimeter two positive lead (10) to “A” terminal (11) of DUVAC controller (12) and
multimeter two negative lead (13) to negative terminal (14) of group “A” batteries.
(4)
With the aid of an assistant, start engine and run engine at 800 to 1,000 RPM, (TM 9-2320-364-10).
(5)
With the aid of an assistant, turn truck head lights and heater on, (TM 9-2320-364-10).
Use caution when turning adjusting screw of potentiometer. Turning adjusting screw with
too much force may damage potentiometer.
NOTE
Multimeter two should read 13 volts to 15 volts.
Potentiometer on regulator is adjusted by turning adjusting screw on potentiometer.
Turning to the right increases voltage. Turning to the left decreases voltage.
Voltage regulator should be adjusted so 13.8 volts to 14.2 volts is read on multimeter one
while multimeter two reads 13 volts to 15 volts.
(6)
Adjust potentiometer (15) on regulator (16) as required.
(7)
Install DUVAC cover (9), four washers (8), lockwashers (7) and screws (6).
(8)
Install battery box cover (1).
b.
Follow-On Maintenance:
Install left side noise panel, (Para 17-28).
Remove wheel chocks, (TM 9-2320-364-10).
END OF TASK
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