Installation, Operation, and Maintenance Manual
SUMMIT PUMP MODEL SP 18
APPENDIX C – IMPELLER CLEARANCE ADJUSTMENT
WARNING!
WEAR EYE PROTECTION. Failure to do
so can result in serious personal injury.
1. Loosen Clamp Bolt(6) on Beta side only.(See Fig. 5)
2. Turn the shaft clockwise by hand and push the Bearing Assembly(2)
forward toward the Frame Plate(31) by tightening the rear nut on the
Adjustment Bolt(3) until the impeller starts rubbing on the Liner (30)
3. Loosen the rear hex nut on the Adjustment Bolt(3) 1/3 turn then move
bearing assembly back with the front nut on the Adjustment Bolt(3) until
the housing is secure against the rear nut.
4. Tighten Clamp Bolt(6) on the Beta side (See Fig. 5) bolts on Alpha side
were secured previously.
5. Secure both Adjustment Bolt(3) Hex Nuts against the Adjustment Lug on
the Bearing Assembly(2)
6. Turn the shaft and if impeller rubs against Liner(30) repeat Steps 1-6 until
the impeller no longer rubs.
CAUTION!
When pumping fluid that will cause
expansion of impeller or liner, increase
impeller clearance to prevent damage to the
pump.
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