Figure 3-1. Centrifugal pump, exploded view.

1. Nut

10.

Shim

2. Lock washer

11.

Shim

3. Pump body

12.

Nut

4. Stud

13.

Lock washer

5. Stud

14.

Seal plate

6. Gasket

15.

Shaft seal assembly

7. Volute gasket

16.

Volute pin

8. Volute

17.

Stud

9. Impeller

Figure 3-1. Centrifugal pump, exploded view.

terclockwise and break it loose from the shaft. Turn

Do not remove the studs (4 and 5) unless they

it from the shaft. Remove and save the shims (10

are damaged and require replacement.

and 11).

e. Two volute pins (16) position the volute (8)

g. Remove the four nuts (1.2) and lock washers

on the seal plate (14). Pull straight out on the

volute to remove it from the seal plate.

(13) that secure the seal plate (14) to the studs (17)

on the engine; remove the seal plate and shaft seal

f. A right-hand thread secures the impeller (9) to

the engine crankshaft. Place a block of wood on one

assembly (15).

of the impeller vanes and strike the block of wood

h. Remove the shaft seal assembly from the seal

with a hammer to rotate the impeller coun-

plate.