Discharge and Intake Pressure Lines

Figure 3-8. Coupling--exploded view.

capscrews and lockwashers which fasten the coupling to

the engine assembly.

3-59. Discharge and Intake Pressure Lines

Disassemble.

Refer to figure 338 and

General. The discharge pressure line runs

disassemble coupling. d. Reassemble. Refer to figure

from the discharge side of the pump to the discharge

338 and reassemble coupling.

pressure gage located on the control panel. The intake

pressure line runs from the intake side of the pump to

Installation. Refer to paragraph 3-60a and

the intake pressure gage located on the control panel.

install coupling in reverse order of removal.

Inspection. Inspect parts for cracks, bends,

3-61. Pump Assembly

breaks, or other damage, replace all missing or

damaged parts.

General. The pump is a centrifugal type

Replacement. Refer to figure 3-37 and

with a 6 inch intake and a 6 inch discharge. It is self-

priming and has an integral check valve which retains

replace pressure lines as necessary.

the fluid in the volute when the pump is shut down. The

enlarged top of the volute acts as a reservoir to provide

3-60. Coupling

rapid self-priming when the pump is started. The pump

shaft is mounted in two single-row bearings supported in

General. The coupling is located between

the intermediate. The impeller is mounted on the end of

the engine and pump assembly. Engine power is

the shaft opposite the drive and with the ball bearings

transmitted through the coupling to the pump.

supporting the center section of the shaft. A mechanical

seal is provided to prevent the

Removal. Remove the pump assembly

(para 3-c) from the pumping unit. Remove the 8

3-36