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 1.
Coupling
10.
Seal
2.
Thrower
11.
Seal clamp ring
3.
Capscrew
12.
Spring guide
4.
Packing
13.
Spring
5.
Flange
14.
Impeller
6.
Housing
15.
Draincock
7.
Gasket, cover
16.
Gasket
8.
Cup
17.
Shaft
9.
Washer
Figure 5-57. Fresh water pump.
(2) Remove taper pin holding impeller (14) to
(3) Replace the gasket and end cover on the
pump shaft (17), then withdraw impeller (14), spring (13),
housing, then tighten the capscrews.
guide (12), seal clamp ring (11), seal (10), washer (9) and cup
f. Installation.
Install the fresh water pump as
(8).
described in paragraph 5-2.f.(2).
(3) Remove the remaining parts only as required.
d. Cleaning, Inspection, and Repairs.
5-22.
Raw Water Pump
(1) Clean all of the parts except the shaft and
a. General. The raw water pump is a gear type pump
bearing assembly. The sealed type pump shaft bearing must
which circulates raw water through one section of the heat
not be immersed in a cleaning fluid since dirt may be washed
exchanger to lower the temperature of the engine coolant in
in, and the fluid cannot be entirely removed.
the other section of the exchanger. The pump is mounted on
(2) Revolve the pump shaft bearing slowly by
the engine bed at the forward right side of the engine and is
hand. If rough spots are detected, replace the shaft (17) and
belt-driven from the engine drive pulley.
bearing assembly. Replace the seal. A seal replacement kit
b. Seal Replacement (Pump Attached to Engine).
includes a shaft and bearing assembly, cover and mounting
Seal parts may be removed and replaced without removing
gaskets, packing, and seal assembly.
the pump from the engine, as follows:
e. Reassembly.
(1) Assemble the impeller and seal assembly in
CAUTION
reverse order of removal (fig. 5-57).
Use care not to scratch or burr the
(2) Position the shaft and impeller assembly in
lapped surfaces of seal seat, or that
the pump housing.
portion of the shaft which the seal
contacts.
(1) Remove five cover screws (24, fig. 5-58), then
lift cover (25) and gasket (26) from the pump housing.
5-73
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