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 TM 55-1905-219-14-8
4-8.2.
FIRE PUMP - MAINTENANCE INSTRTUCTIONS. (Continued).
LOCATION
ITEM
ACTION
REMARKS
INSPECTION - INTERNAL COMPONENTS
5. Casing
a. Casing
Clean and inspect gasket
(6)
surfaces for damaged
areas that would cause
leaks.
b. Wear
Inspect for excessive
Wear ring
ring
wear on surfaces.
clearances are
(30)
0.018-0.024
inch.
6. Impeller
Impeller
1. Check wearing ring
If excessively
(9)
surfaces for exces-
worn or eroded,
sive wear.
the impeller
must be replac
ed.
2. Check gasket sur-
faces of impeller
hub for damage.
7. Motor
Shaft (14)
Inspect for bending.
Insert sleeve
shaft
(28) on shaft
(14). Install
a dial indica-
tor. Rotate
shaft by hand.
Maximum allow-
able runout is
0.002 inch.
8. Stuffing
Cover (19)
1. Clean and inspect
box cover
gasket surfaces.
2. Remove any dirt and
scale from cavity.
3. Check cover ring for
wear and excess clear-
ance.
9. Adapter
Adapter (7)
1. Check for damage to
precision surfaces
that locate casing
and bearing frame to
preserve proper
internal alignment.
4-444
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