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TM 5-4320-305-10
1-12.
PUMP UNIT (Continued)
PUMP ASSEMBLY (3). The pump assembly uses the turning force of the engine to pump liquid from the suction port to
the discharge port of the pump body. The pump body is mounted to the trailer frame, and connects to the suction and
discharge manifold assemblies. The bearing housing attaches to the engine, and contains the impeller drive shaft.
TRAILER ASSEMBLY (4) -he trailer assembly is a mobile mounting platform for the components of the pumping
assembly.
SUCTION GATE VALVE (1). This gate valve regulates the flow of liquid from the supply hose into the pumping
components.
SUCTION STRAINER (2). This in-line strainer has a mesh strainer screen. The strainer filters large particles out of the
liquid before it enters the pump body.
PUMP BODY (3). The pump body houses the impeller which pumps fluid from the inlet to the outlet of the pump body.
AIR VALVE COVER (4). The air valve cover is located at the top of the discharge elbow on top of the pump body. This
assembly vents air from the pump body and discharge components during pumping and priming operations.
DISCHARGE CHECK VALVE (5). This flapper-type check valve is spring loaded. It allows liquid to flow in the discharge
direction, and closes to stop liquid from flowing in the reverse direction.
DISCHARGE GATE VALVE (6). This gate valve regulates the liquid flow from the pump discharge components into the
discharge hose.
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