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TM 5-4320-304-14
TM 08922A-14/1
Section III. TECHNICAL PRINCIPLES OF OPERATION
1-13. CENTRIFUGAL PUMP UNIT
ENGINE - bolted to frame. Provides the power necessary to drive the pump. Includes:
LUBRICATION SYSTEM - pressure lubricates the entire drive and governor mechanisms.
COOLING SYSTEM - includes a blower ring, mounted to the flywheel, which blows cool air
through crankcase housing ports onto the cylinder.
FUEL SYSTEM - includes a fuel lift pump, fuel injection pump, venting pipe, fuel tank, filter,
and fuel pressure pipe. The fuel lift pump pumps fuel from the fuel tank, through its filter, to the
fuel injection pump, then to the injector through the fuel pressure pipe.
EXHAUST SYSTEM - includes a muffler and protective screen. The exhaust system transfers
exhaust gases from the engine to the muffler. The muffler quiets the sound and reduces the temperature
of the exhaust.
1-6
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