| Replacing the Impeller IMPORTANT: PART COMPATIBILITY NOTE. When
changing from the steel to the plastic impeller, discard the washer that sits between the
spring top and the impeller bottom. Use of the washer is not required with plastic
impellers. Failure to eliminate the washer could result in faulty operation.
With the shaft still resting on the wooden block, place the seal spring on the shaft;
it should rest atop the brass collar. Next, place the impeller (see note above - there
should be no washer) and if required, the lock washer on the shaft (this lock washer is
not used with the plastic impeller either). Thread the impeller nut to the shaft and
tighten with a socket wrench or an offset box wrench.
DO NOT OVER-TIGHTEN - provide 25-45 in-lbs. of torque to secure the plastic impeller.
For Boosters and Series 60/90/1522/1535 pumps with metallic impellers, provide 96-144
in-lbs. of torque. |
