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TM 5-4210-220-34
2-19.
ENGINE - Continued
(18)
Lubricate bearing bores and shaft bearing surfaces with engine oil (item 17, Appendix B).
(19)
Press bearings (11 and 12) on shaft using J25257 gear and bearing installer. Press only on the inner races
during installation.
(20)
Support pump body (3) on press bed with cover side down. Press shaft and bearing assembly in place by
applying pressure on the outer race of the large bearing (12).
(21)
Install bearing retaining ring (13).
(22)
Inspect water pump driven gear for damaged teeth. Replace as required.
(23)
Inspect water pump drive gear or engine for possible related failure. Refer to General Support Level if repair
is necessary to drive gear.
(24)
Position gear installer J25257 on impeller end of shaft (8). Press gear (14) on shaft so it is flush with end of
shaft.
(25)
Apply film of engine oil (item 17, Appendix B) 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 counter-bore
using suitable installing sleeve.
(26)
Apply a light coat of seal retainer (item 26, Appendix B) 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.
(27)
Inspect water pump impeller (7) for erosion and excessive wear.
(28)
If impeller is reused, the ceramic impeller insert must be replaced. If new impeller is to be installed proceed
to step 36.
(29)
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 not 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 (30 to 59 deg. C).
(30)
Clean with dry cleaning solvent (item 10, Appendix B).
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/cm2) or less. When
working with compressed air, always use chip guards eye protection and other personal protection
equipment.
2-225
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