Ampco Pumps Company LF 401, Instruction & Maintenance Manual

Page: 31 / 36

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3. While pushing the impeller nut,
impeller, and shaft collar towards
the motor slightly pinching the
shim, tighten the socket head cap
screw in the shaft collar. Torque
the socket cap screw to the right
torque value that correlates to the
frame size of the motor. When the
shaft collar screw is not torqued to
the correct value the shaft may
move during pump operation al-
though the shaft cannot be moved
by hand along the motors axis.
Torquing the shaft collar screw
more than the recommended value
may break the screw.
4. Check the clearance between
the rest of the impeller vanes. With
the gage behind each vane rotate
the impeller a full revolution to en-
sure there is a minimum clearance
as in figure 23 and 24. The gage
should easily slip behind each
vane.
LF & LM SERIES PUMPS
Figure 39
Figure 40
Figure 41
Push