Graymills Impeller Replacement - Manual

Graymills Corporation 3705 N. Lincoln Ave. Chicago, IL 60613 USA 773-248-6825 FAX 773-477-8673 www.graymills.com
IMPELLER KIT 13712 INSTRUCTIONS
795-41608_0613
REPLACING DOUBLE SUCTION
IMPELLER
A double suction impeller has blades on the top
and bottom
1. Remove existing cotter pin, nut, spacer, Bushing,
sleeve, drive washer, impeller and spring.
2. With pump up-side-down replace spring and a
flat washer on shaft first (follow drawing).
3. Slip new impeller on shaft. The words, “Top” and
“Bottom”, are embossed on the impeller. Be sure
the “Top” of the impeller is towards the motor.
4. Replace all parts shown; except cotter pin. Tight-
ening the nut will push the impeller against the
spring; compressing it.
5. Tighten the nut until the impeller is about .045”
from the volute. THE IMPELLER MUST NOT BE
FORCED AGAINST THE VOLUTE. A convenient
gauge is a dime.
Use it to check the clearance between the impel-
ler and the pump. The Impeller should now turn
freely without rubbing top.
6. Replace the cotter pin to lock the nut.
7. Replace gasket if part of assembly. Assemble
volute cover plate and bearing retainer. Spin
impeller. It should spin freely without rubbing top
or bottom.