Inspection. - TM-55-1930-208-240135

TM 55-1930-208-24

3-24. PUMP, WATER - Continued

d. Inspection.

(1) Revolve the pump shaft bearing slowly by hand. Check for any rough spots. If rough spots are detected, replace

the shaft and bearing assembly and the seal.

(2) Examine the impeller and seal components for evidence of wear. If worn, replace them.

e. Repair. Water pump repairs are accomplished by replacement of defective parts.

f. Reassembly.

(1) Refer to figure 3-58 and support the impeller end of the pump body (22) on an arbor press and insert the coupling

end of the shaft and bearing assembly (19) into the pump body. Then press against the outer race of the bearing

until the bearing contacts the shoulder in the pump body.

(2) With the surface of the pump seal (21) clean and free from dirt and metallic particles, apply a thin coat of liquid

soap on the inside diameter of the seal. Slide the seal on the pump shaft until it is seated against the insert in

the pump body.

(3) Support the bearing end of the shaft on the bed of an arbor press and press the impeller (20) on the shaft. Do

not press against the outer race of the bearing. The end of the shaft must be flush with the face of the impeller

hub with the bearing held against the shoulder in the pump body.

(4) Support the impeller end of the pump shaft on an arbor press and press the shaft drive coupling (23) on the

shaft. The coupling must be flush with the end of the shaft. Make sure the coupling is tight on the shaft.

(5) Rotate the shaft by hand to be sure the rear face of the impeller blades does not rub the pump body.

(6) Install drain cock (18) in the pump body and install plug (16) in pump cover (15).

(7) Attach pump cover (15) and new cover gasket (17) to pump body with four bolts (13) and four lockwashers (14).

(8) Install water pump connector (12) in the pump cover.

g. Installation.

(1) Refer to figure 3-58 and place the pump outlet flange (7) over the pump outlet with the flat side of flange facing

the pump body. Slip the packing ring (8) over the pump outlet and next to the flange.

3-98