Pulsafeeder Isochem RGT IOM - Manual (Page 28)

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k) Remove the pipe plug (item 27) from the central face of the front cover to expose the
tapped hole in the end of the shaft and thread a 1/4-20 screw into the shaft to rotate the
shaft (refer to Figure 9). With the screw bottomed hand-tight in the shaft, free axial play
of the shaft relative to the impeller can be confirmed by alternately pushing and pulling
the screw. This condition is essential since it confirms that the impeller floats axially on
the shaft. If there is significant resistance to rotation, additional shimming is required,
using a starting value of 0.002”.
Figure 9
l) Remove the screw, and replace the access pipe plug (item 27) using pipe joint compound
or tape.
22. Verify that the rear housing drain plug (item 27) is installed; if not, do so using pipe joint
compound or tape.
23. Refer to the Installation and Startup instructions to return the pump to service.