AUXILIARY POWER UNIT (APU)
APU: The APU uses a separate and independent engine to drive (via a chain-and-sprocket
arrangement) an electrical generator and primary hydraulic pump.
APU ENGINE: The engine is a two-cylinder, four-cycle, 11.5 horsepower diesel engine.
Ignition, fuel supply switch, and engine indicators are located on the APU control box in the
ELECTRICAL GENERATOR: When driven, the generator will supply enough power to run
its own electrical system and that of a supported vehicle, via slave receptacles and cable.
This slave power may be used to charge dead batteries of a disabled vehicle or to operate
the supported vehicles electrical system.
HYDRAULIC PUMP: The pump supplies hydraulic fluid to all hydraulic circuits whenever the
APU is functioning. The pump is of the rotary-gear type.