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 TM 55-1905-220-14-10
5-37. FRESH WATER PUMP-MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
INSPECTION
2.
a. Clean all of the parts except the shaft and bearing
assembly. The sealed-type pump shaft bearing must
not be immersed in a cleaning fluid since dirt may
be washed in and the fluid cannot be entirely re-
moved.
b. Revolve the pump shaft bearing slowly by hand. If
rough spots are detected, replace the shaft and
bearing assembly and the seal assembly. A seal
replacement kit includes a shaft and bearing assem-
bly, cover and mounting gaskets, packing and seal
assembly.
c. Examine the impeller for wear, and replace it if
necessary.
REASSEMBLY
3.
a. Steel
If a new steel insert is to be used in
insert
the pump body, make sure the counter-
(9)
bore in the pump body is thoroughly
clean before installing a new insert.
Dirt in the counterbore can cause mis-
alignment between the insert and the
carbon washer and result in a leak
at this point. Start the counterbored
end of the insert into the pump body.
Then, press the insert in until it
contacts the shoulder in the pump body.
The insert has a .0015 inch-.0035
inch press fit in the pump body.
Do not mar the highly finished seal contact surface of the insert
when pressing it into the pump body.
5-602
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