IMPELLER / WEAR RINGS SHIMMING INSTRUCTIONS

 

Tools Needed:

1. 0.30 feeler gauge

2. Propane torch.

3.  Bent screwdriver

4. WD-40

5. Impeller wrench

6. 3/4" wrench

7. 9/16" wrench

8. Dead blow hammer

 

Use a propane torch.  Place the flame on the brass ring go around in a circular motion until the insulator starts to melt.  Grab the ring with a bent over screwdriver (90 degrees) and pull out.  Clean up wear ring bore.

Installation:

 

Place wear ring in freezer for four hours.   Place insulator in suction bore.  Spray with WD-40.  Start wear ring by hand.  Tap wear ring in using a wooden block and a mallet.  You may use an old impeller, but it may bottom out on the shaft before seating the ring.

 

Important:

Wear ring must be seated square in the bore within 0.004" side to side.

The axial clearance between the impeller and the impeller shoulder must be 0.025"-0.035" (check several places around the wear ring.)  Check again after the impeller nut has been tightened.

Torque impeller nut to 70 ft/lbs.  Torque bowl bolts to 50 ft/lbs.

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