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 1.
Bearing housing
11.
Pump impeller
2.
Bearing locknut
12.
Wearing ring
3.
Bearing housing cap
13.
Casing wearing ring
4.
Bearing housing cover
14.
Shaft packing
5.
Fluid deflector
16.
Cage ring
6.
Sleeve locknut
16.
Shaft sleeve
7.
Shaft sleeve
17.
Sleeve locknut
8.
Packing gland
18.
Bearing housing cap
9.
Water seal tube
19.
Bearing, housing thrust end
10.
Pump casing
20.
Housing plug
Figure 5-75. Fire pump.
(5)
Remove capscrews from bearing housing cover
(2)
Remove packing glands from shaft.
and withdraw bearing housing from pump lower half casing.
(3)
Remove old packing rings from around shaft.
(6)
Remove locknut (2) and bearing from pump
Remove cage ring and stuffing box bushing.
shaft.
(4)
Remove setscrew from the shaft sleeve (16) and
remove nut and shaft sleeve from shaft.
NOTE
NOTE
When cleaning or replacing bearing,
It may be necessary to apply heat to shaft
remove one at a time. If pump is being
sleeve in order to remove the sleeve from
overhauled remove both bearings.
shaft. Apply only enough heat to expand
(7)
Thrust bearing is removed in the same way.
the sleeve; do not heat the shaft.
(8)
To remove shaft and impeller, remove bolts and
nuts holding upper and lower pump casings together and
(5)
Remove impeller from shaft.
It may be
remove the upper casing.
necessary to heat the impeller to remove from shaft, in which
(9)
Lift shaft and impeller assembly from pump.
event, heat only enough to expand impeller; do not heat shaft.
e. Disassembly.
f. Cleaning, Inspection, and Repair.
(1)
Remove the setscrews which hold fluid deflector
(1)
Inspect wearing rings on impeller. If wearing
(5) in place and slide bearing housing covers and deflectors
rings show signs of scoring, replace them.
from shaft.
5-100
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