Bell & Gossett VTP2006 Series VTP – Vertical Turbine Pumps - Manual (Page 32)

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3. Hold the shaft in this position by inserting a long
capscrew (or all thread rod with a hex nut) with an
assembly jig into the bottom end of the suction hub
and secure tight into the threaded hole at the end
of the shaft. Be sure the shaft has been cleaned and
checked for straightness.
4. Slide the first impeller over the shaft until it seats on
the suction bowl/bell.
NOTE: If there are different diameter impellers, put the
large diameter impeller at the lower stage.
5. Insert a screwdriver into the slot in the taperlock
(677) to spread the slot and slide the taperlock over
the pump shaft. Hold the impeller against bowl and
slide the taperlock into the impeller hub. Be sure the
taperlocks have been cleaned and are dry.
6. Hold impeller firmly against the suction bowl/bell
and drive the taperlock into place with a taperlock
driver, (See Figure 22). After the impeller is secured
in position, the top end of the taperlock should be
1/8” above the impeller hub.
7. Slide intermediate bowl (670) onto shaft and secure
with capscrews provided.
8. Repeat preceding procedure for number of stages
required.
9. Remove long capscrew and the assembly jig at the
end of suction hub and check that the shaft rotates
freely without dragging or binding. Also check for
adequate lateral (end play).
FINAL ASSEMBLY
After reassembling the bowl assembly, see Section 3 for
installation. Refer to Section 4, for startup and operation
procedures.
Figure 22
SHAFT
IMPELLER
BOWL
TAPERLOCK
DRIVER
DISASSEMBLY
POSITION