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TM 55-1905-223-24-12
2-24. Replace Centrifugal Pump. (FIGURE 2-3)
This task covers:
a. Removal, b. Inspect, c. Replacement, d. Adjust.
Equipment Condition
Tool kit, general mechanic's,
Refer to the following paragraph
in this maintenance manual.
Torque wrench set (30-300 foot-pounds)
Centrifugal pump unit removed
Pump assembly P/N 3x2x9F
Cleaning solvent, Item 2, Appendix C
Rags, Item 5, Appendix C
a. Set the motor/pump assembly up on the end of the motor (3) on a level clear surface.
b. Remove eight pump casing clamping lug machine bolts (19) and lugs (20). Remove entire rotating
assembly, motor, and adapter (9), leaving pump casing connected in place.
c. To remove pump from adapter and rotating assembly, perform the following tasks.
Remove impeller nut (26) holding impeller (24) by outside diameter.
Remove impeller (24) from the shaft (25).
Remove machine key (22), stuffing box gland nuts (17), and cover (13) and casing seal (31) from
the adapter and shaft assembly.
The mechanical seal should now be exposed on the shaft
sleeve. (In some cases, the shaft sleeve may come off the shaft
with the stuffing box cover.) If this happens, gently press or pull
the shaft sleeve and mechanical seal from the stuffing box
toward motor side of the stuffing box cover. This will expose the
mechanical seal.


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