SPI SP41, Installation Operation & Maintenance

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3. Temporarily assemble the pump adapter (1) onto the motor c-face using the four hex-head cap
screws provided. Lightly snug the screws as the adapter will need to be removed later for
access to the impeller shaft (4) screws. The adapter has two slots and one drain hole (shown in
Figure 4 and 5 ). It is oriented as follows:
• The slots will be on either side but should be oriented horizontally at the 3 or 9 o’ clock
positions.
• The drain hole must point down to allow for proper drainage.
NOTE: If there is not access to the set screw from step 2 through the adapter slot; re-position the
impeller shaft (4) until access is possible.
4. Temporarily assemble the impeller (10) onto the impeller shaft (4). Use food grade anti-seize on
the impeller shaft threads and tighten the impeller by hand, only. It is right hand thread.
5. Set the impeller (10) clearance from the adapter (2) – specification is 0.06” +/- 0.01” clearance.
(See Figure 6 .)
A. Loosen the set screw on the impeller shaft (4) using a 5/32” hex wrench by gaining access
through the slots in the adapter.
B. Using a feeler gauge between the impeller (10) and adapter (1), push the impeller onto the
gauge and tighten the set screw on the impeller shaft from step 2.
• Check all impeller blades. If any of them exhibit clearances under the low-end of the
clearance tolerance, repeat steps 5A and 5B until the minimum clearance is met on all
impeller blades.
FIG. 4 - ADAPTER SLOTS FIG. 5 - ADAPTER DRAIN HOLE FIG. 6 - IMPELLER CLEARANCE MEASUREMENT
\\ASSEMBLY INSTRUCTIONS - SP41
0.060±0.01