Shaft Seal Replacement Replace

TM 5-4320-258-34

g. After assembly, operate the check valve by

b. Remove the check valve seat (9) and the

hand to assure that it operates freely, and that it seats

check valve assembly consisting of the large weight

firmly against the valve seat.

(13), small weight (14), and gasket (15). Remove the

screw (10), nut (11), and lock washer (12) to separate

5-3.

Shaft Seal Replacement Replace

the check valve parts.

c. Clean all parts with cleaning solvent (FED.

a. leaking shaft seal as follows: a. Remove

Spec. P-D-680); dry thoroughly.

the tool box from the centrifugal pump assembly (TM 5-

d. Inspect the gasket for wear, cracks, tears,

4320-258-12).

b. Remove the drain plug (1, fig. 5-1) and

and damaged seating surfaces. Replace a damaged

gasket.

drain all fluid from the pump body.

e. Inspect the check valve seat for cracks and

c. Use a hoist or other lifting device to

for a damaged seating surface. Replace if damaged.

support the weight of the pump body (3, fig. 5-2).

Reassemble the parts by reversing the

Remove the bolts, nuts, and lock washers that secure

removal procedure. Make sure the small weight is

the feet of the pump body to the skid base.

assembled to face outward. Tighten the nuts evenly

and alternately in increments to prevent distortion of the

check valve gasket.

5-3