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

TM 5-4320-234-34

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

b. The centrifugal pump has a 6-inch suction

maximum speed. The engine is inclosed in a housing

that has coolant and oil drains ported to the outside of

flange secured to the front of the pump body, and a

the housing for easy access. The engine uses an

6inch discharge elbow secured to the top of the pump

electrical starting motor, has magneto ignition and uses

body. The bearing housing (13, fig. 5-2) joins the

an alternator to restore the charge of the battery as it is

flywheel housing of the engine with the pump body,

depleted by operation of the starting motor. The

providing correct spacing and proper alinement of the

conventional radiator-type cooling system uses a

parts. The bearing housing also provides the bearing

pusher-type cooling fan which forces cooling air through

seats for the ball bearings that support the impeller

the radiator from the inside out. The fan also maintains

shaft. The impeller is keyed to the end of the impeller

a flow of air around the engine to provide proper

shaft and is secured with a locking cone. The impeller is

cooling.

inclosed in a close fitting volute to provide efficient

pumping operation. A replaceable wear plate at the

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

front of the impeller is subjected to most of the internal

wheeled chassis. The chassis consists primarily of hub

pump wear.

assemblies, pneumatic tires, welded frame, and axle.

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

e. You will find detailed descriptions of centrifugal

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

pump components in the repair paragraphs of this

Engine speed is governed by a flyball-type governor and

manual.

is protected by an over-speed governor that shuts off

the engine when the engine speed reaches a : preset

1-3