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TM 5-4320-305-10
Section III. TECHNICAL PRINCIPLES OF OPERATION
1-12.
PUMP UNIT
The US612ACD-1 six-inch hoseline pumping assembly is a wheel-mounted, diesel-engine-driven, self-priming centrifugal
pump. It is designed to pump petroleum products or potable water at a maximum operational output of 600 gpm (2271
L/min) at 150 psig (1034 kPa). The assembly can be operated independently or in a staged, multi-pump system. The
pumping assembly is ventilated and protected so it can operate continuously during periods of blowing sand. The self-
priming centrifugal pump is directly coupled to a turbocharged diesel engine which can be operated manually or
automatically through an electric governor. Controls regulating either mode of engine operation are contained in the
control panel mounted at the front of the assembly. The pump and engine are mounted on a two-wheel trailer assembly
with integral towing bar and leveling supports.
CONTROL SYSTEM (1). The pump assembly control system regulates suction and discharge pressure by controlling
engine speed. The system control panel is mounted at the front of the centrifugal pump unit. The control panel contains
both the automatic pressure control (control box) and the system instruments.
ENGINE (2). The engine provides turning force to the pump rotor. The engine flywheel is coupled to the drive shaft of
the pump impeller. The engine is bolted to the trailer frame.
1-10
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