Assembly-continued -706880840

TM 5-4210-233-14&P-1

5-25. WATER PUMP - Continued

(8)

Apply film of engine oil (Item 20, Appendix E) to sealing areas of oil seal (10) and shaft (8). Install

seal with spring loaded tip towards bearing in pump housing (3). Press or tap seal flush with water

seal counterbore using suitable installing sleeve.

(9)

Apply a light coat of seal retainer (Item 6, Appendix E) on outside diameter of water seal (9). Install

seal in the pump body housing (3) with a sleeve large enough to fit around the seal case and resting

on the brass lip. Press seal into position.

(10) Inspect water pump impeller (7) for erosion and excessive wear.

(11) If impeller is reused, the ceramic impeller insert must be replaced. If new impeller is to be installed

proceed to step 19.

(12) Bake impeller assembly at 500 deg. F (260 deg. C) for one hour. Remove insert while adhesive is

hot. Allow impeller to cool. Clean the insert area with buffing wheel to remove old adhesive and

oxide build up.

WARNING

Dry cleaning solvent P-D-680 (safety or Stoddard's solvent) is

potentially dangerous. Avoid repeated and prolonged breathing

of vapors and skin contact with the liquid. Do no use near open

flame, arcing equipment or other ignition sources. Always wear

eye protection and protective clothing. The flash point of P-D-

680 is 100 to 138 deg. F (38 to 59 deg. C).

(13) Clean with dry cleaning solvent (Item 3, Appendix E).

WARNING

Death or serious injury could occur if compressed air is directed

against the skin. Do not use compressed air for cleaning or

drying unless the pressure is/has been reduced to 30 psi (2.11

kg/cm 2) or less. When working with compressed air, always

use chip guards eye protection and other personal protection

equipment.

(14)

Clean parts with compressed air.

(15)

Place the new adhesive washer in the impeller bond area with the new ceramic insert on top.

(16)

Clamp ceramic insert and impeller together with 3/8"-24 in. bolt, nut and two flat washers. Torque

to 10 ft Ibs (14 Nm).

(17)

Place impeller assembly in level position, insert upwards, in an oven preheated to 350 deg. F (177

deg. C) for one hour to cure adhesive.

(18)

Cool impeller to room temperature and remove bolt, nut, and two flat washers.

(19)

Make sure mating surfaces of water seal (9) and the ceramic insert in impeller (7) are free of dirt

or oil film.

(20)

Apply small amount of antiseize compound (Item 4, Appendix E) to the threads of the pump shaft

(8).

5-170