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 TM 55-1905-223-24-18-2
3-111. REPAIR CENTRIFUGAL PUMP UNIT (AUXILIARY SEAWATER COOLING). (Figure 3-95).
This task covers:
a. Disassembly
b. Repair
c. Assembly
INITIAL SETUP :
Tools
Equipment Condition
Tool kit, general mechanic's,
Electrical power to pump unit turned
OFF at auxiliary machinery motor
Torque wrench, 5120-00-242-3264
control center and tagged "Out of
(0-50 ft-lb)
Service - Do Not Operate."
Valves S.W.-3 and S.W.-6 closed and
Materials/Parts
tagged "Out of Service - Do Not
Operate."
Centrifugal pump impeller
P/N 4-002-0
Mechanical seal P/N 6-400-O
Preformed packing P/N 2-914-0
Metal tube assembly P/N 1-652-0
Wearing ring P/N 2-003-5
Wearing ring P/N 2-003-6
Warning tags, Item 1, Appendix C
DISASSEMBLY
a. Remove metal tube assembly (5) by disconnecting fittings (2) and (4).
b. Remove plug (12).
c. Remove eight hex head capscrews (1).
d. Remove casing (13).
e. Remove impeller nut (11) by turning nut counterclockwise.
f. Remove centrifugal pump impeller (7).
g. Remove impeller key (9).
h. Remove shoulder shaft (10) by unscrewing counterclockwise from shaft (23).
i. Remove two gland nuts (18) from gland studs (19) on stuffing box cover (15).
j. Slide stuffing box cover (15) towards casing end of pump and off gland (20),
shaft sleeve (21) and sleeve spacer (3).
k. Remove preformed packing (14) from stuffing box cover (15).
3-392
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