Figure 1-2. Centrifugal pump, right front view.

TM 5-4320-234-12

Figure 1-2. Centrifugal pump, right front view.

b. The centrifugal pump has a 6-inch suction

motor, has magneto ignition, and uses an alternator to

restore the charge of the battery as it is depleted by

flange secured to the front of the pump body and a 6-

operation of the starting motor. The conventional

inch discharge elbow secured to the top of the pump

radiator-type cooling system uses a pusher-type cooling

body. The bearing housing joins the flywheel housing of

fan which forces cooling air through the radiator from

the engine with the pump body, providing correct

the inside out. The fan also maintains a flow of air

spacing and proper alinement of the parts. The bearing

around the engine to provide proper cooling.

housing also provides the bearing seats for the ball

d. The engine and pump are protected by three

bearings that support the impeller shaft. The impeller is

keyed to the end of the impeller shaft and is secured

safety controls. The overspeed governor shuts off the

with a locking cone. The impeller is enclosed in a close-

engine when speed exceeds a preset maximum. The oil

fitting volute to provide efficient pumping operation. A

pressure safety switch shuts off the engine when oil

replaceable wear plate at the front of the impeller takes

pressure drops below a preset minimum.

The

most of the internal pump wear.

temperature safety switch shuts off the engine when

c. The engine is a six-cylinder, water-cooled,

coolant temperature exceeds a preset maximum.

e. The engine and pump are secured to a two-

pressure-lubricated, four-stroke-cycle, L-head type.

Engine speed is governed by a flyball-type governor.

wheeled chassis. The chassis consists primarily of hub

The engine is enclosed in a housing that has coolant

assemblies, pneumatic tires, welded frame, and axle.

and oil drains ported to the outside of the housing for

Two retractable stands are provided at the rear of the

easy access. The engine uses an electrical starting

chassis and one folding leg is installed at the front.

1-3