Lockwasher (6) (Item 195, Appendix F)
This task covers:
b. Follow-On Maintenance
Engine OFF, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
Left side noise panel removed, (Para 17-28)
Tools and Special Tools
Tool Kit, General Mechanics: Automotive
(Item 74, Appendix G)
Multimeter (2) (Item 44, Appendix G)
7-10. DUAL VOLTAGE ALTERNATOR CONTROL (DUVAC) ADJUSTMENT (145 AMP).
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive
electrical circuits, a direct short may result. Damage to equipment, injury or death to personnel
Multimeter is positioned in 24 VDC mode.
DUVAC controller should reset to the 24 vdc charge mode approximately every 55
seconds. Take the voltage reading for at least two minutes to allow the regulator timer to
Every 55-60 seconds you will see momentary drop in voltage as regulator resets from 12
to 24 vdc charging mode.
Charging voltage could drop as low as 0 vdc.
Remove battery box cover (1) and connect multimeter one positive lead (2) to positive terminal (3) and
multimeter one negative lead (4) to negative terminal (5) on group B batteries.