TM 5-4320-302-14the lube oil cooler reduces the temperature of the lube oil which cools the engine, and the lube oil filter removes impurities from the oil.3. COOLING SYSTEM. Major components include a cooling air blower, cooling air ducting, and a lube oilcooler. The primary coolant is the engine lube oil. The secondary coolant is forced cool air. The coolingair blower blows cool air onto the cylinders and the lube oil cooler, cooling the lube oil while it is beingcirculated by the engine.4. FUEL SYSTEM. Major functional components include a fuel feed pump, fuel injection pump, fuel tank,filter, and lines. The fuel feed pump pumps fuel from the fuel tank, through its filter, to the fuel injectionpump, then to the engine. The fuel lines connect the major components.5. EXHAUST SYSTEM. Major functional components are the exhaust manifold, exhaust silencer, elbows andnipples, and an exhaust primer assembly. The exhaust manifold transfers exhaust gases from the engineto the exhaust silencer. The exhaust silencer quiets the sound and reduces the temperature of the exhaust.The exhaust primer assembly is connected to the outlet of the exhaust silencer by an elbow and a nipple.During operation of the engine, exhaust normally flows past the exhaust primer rain cap. If the pumprequires priming, the operator can close the rain cap and force the exhaust through a venturi in the exhaustprimer assembly. If while doing this the operator opens the valve cock in the line to the pump body, thevolute will be primed.(B) CENTRIFUGAL PUMP. Major components include a volute, impeller, check valve, and pump body withsuction and discharge ports. The volute houses the impeller which draws water in through the suction port andforces it out of the pump through the discharge port. The check valve prevents discharged water from runningback through the pump.(C)KID. The skid is the movable mounting support for the engine and centrifugal pump.1-8
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