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 TM 55-1905-223-24-18-2
l. Remove motor foot (14).
m. Remove electric motor (1).
REPAIR
Repair of fresh water booster centrifugal pump consists of replacing gasket (6),
centrifugal pump impeller (12), shaft seal assembly (13), and shoulder shaft (5).
ASSEMBLY
a. Attach support head (3) and motor foot (14) to electric motor (1) with four
hex head capscrews (7). Tighten to 10 to 15 ft-lb torque (13.6 to 20.3 N m).
b. Install shoulder shaft (5) onto motor shaft.
c. Replace setscrew (4) in shoulder shaft (5) but do not tighten at this time.
d. Place shaft seal assembly (13) onto shoulder shaft (5) followed by impeller
(12). Attach with machine bolt (10) and flat washer (11).
e. Tighten machine bolt to 2 to 4 ft-lb torque (2.7 to 5.4 N m).
f. Position gasket (6) on support head (3) and attach casing (8) with four hex
head capscrews (2). Tighten to 25 ft-lb torque (33.9 N m).
g. Replace two plugs (9).
h. Adjust impeller running clearance.
(1) Move shoulder shaft (5) forward (towards casing) until impeller (12) is
touching casing (8).
(2) Insert feeler gauge between shoulder on shaft and nose of support head
(3) Measure gap.
(3) Add 0.010 inch to feeler gauge and move shoulder shaft back (toward motor)
until feeler goes in between shoulder on shaft and nose of support head.
(4) Tighten set screw (4) to 5 to 6 ft-lb torque (6.8 to 8.1 N m).
(5) Remove feeler gauge.
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