OPERATING THE APU (continued)
Electrical Support of Another Vehicle
Under normal conditions, the APU generator can supply enough electrical power to operate
its own electrical system and that of another vehicle that possesses a compatible electrical
system. There are limitations to the generators output, however. When your vehicles
hydraulic system operates under load, the generator may occasionally switch off. This is only
a temporary situation, and the generatorwill automatically switch on when hydraulic pressure
Park your vehicle close enough to the supported vehicle so that the slave cable can be
interconnected at the slave receptacles of both vehicles. If your M992A1 is to support
a self-propelled howitzer (M109A2, M109A3, or M109A6) during conveyor operation,
position your vehicle back-to-back with the howitzer and deploy the conveyor (p. 2-150).
With brake pedal (3) depressed, place transmission shift selector lever (1) in N (neutral)
and set parking BRAKE LOCK handle (2).
Turn MASTER switch and all other electrical switches in both
vehicles OFF, to avoid personal injury or vehicle damage.
Shut down main engine in both vehicles (p. 2-99). Turn MASTER switches to OFF in both