5-25. WATER PUMP - Continued
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.
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.
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).
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
Clean parts with compressed air.
Place the new adhesive washer in the impeller bond area with the new ceramic insert on top.
Clamp ceramic insert and impeller together with 3/8"-24 in. bolt, nut and two flat washers. Torque
to 10 ft Ibs (14 Nm).
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.
Cool impeller to room temperature and remove bolt, nut, and two flat washers.
Make sure mating surfaces of water seal (9) and the ceramic insert in impeller (7) are free of dirt
or oil film.
Apply small amount of antiseize compound (Item 4, Appendix E) to the threads of the pump shaft