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TM 10-4320-343-14
5.6.2.2 Installation.
When installing impeller,
ensure that spring remains centered on spring
centering washer.
a.
b .
c .
d.
e.
f .
Install spring (13),
spring centering washer (12), and spacer shims (11) On
s h a f t.
With large end of intermediate bracket on clean work surface, and threaded
(impeller) end of shaft up,
install impeller (10) onto shaft by rotating
clockwise, until all main shaft, sleeve,
and impeller hub mating surfaces are
a snug fit.
No torquing is required.
Impeller tightens
itself during pump
operation.
Place gasket (5) on volute housing (2) near flange.
With vernier caliper, determine dimension A from rear of gasket on flange of
volute to center of discharge opening inside volute as shown in figure 5-12/
sheet 2.
Measure dimension B from front flange of seal plate to center of impeller
opening as shown in figure 5-12 sheet 2.
Determine the difference between dimensions A and B.
When the difference between A and B is greater or less than 1/32 inch
(0.794mm), do not install impeller.
Failure to obey this caution may result
in equipment damage.
g .
h.
i .
j .
k.
l .
When difference is greater or less than 1/32 inch (0.794 mm), remove impeller
and add or remove shims as required.
Tap out suction wear ring.
Install new suction wear ring with widest face towards suction outlet.
Assemble volute housing (figure 5-12, sheet 1, 2) and intermediate
housing (1) making certain that scribe marks made
in paragraph 5.2.2.1 step a
are aligned.
Secure volute housing (2) and intermediate bracket (1) together with
lockwashers (4) and nuts (3).
Torque nuts as indicated in appendix G.
Install lockwashers (7) and screws (6).
5-37
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