DISASSEMBLY OF SHREDDING RING AND IMPELLER
1. Remove screws from holding ring and remove ring.
2. Use two screwdrivers, one each on opposite side of ring and pry on snap ring that holds shredding ring in place.
Remove shredding ring.
3. Hold impeller by prying against impeller cutting bar and remove cap screw from end of shaft.
4. Use large screwdriver in slot in end of shaft and bump on cutter vane with plastic hammer. Bump in
counterclockwise direction as thread is right hand. It may take several bumps to loosen impeller.
If impeller cannot be loosened it will be necessary to take unit to service station for service. DON’T
CONTINUE TO POUND ON IMPELLER AS IMPELLER AND SHAFT CAN BE DAMAGED.
5. If impeller comes off easily, clean up and replace if worn.
6. Be sure pump impeller has not loosened when grinder impeller is removed. This can be checked on reassembly
of grinder impeller and shredding ring. Tips of impeller cutter vanes should extend about 1/8” below bottom of
shredding ring. If more than 1/8” extends below ring it means pump impeller has loosened.
Remove grinder impeller and ring as described above and remove bolts from pump case and remove case. Use
back off screws in motor mounting plate to pry loose from pump case.
7. After case is removed, wrap emery paper around shaft and hold with vise grip pliers. Use cloth on impeller and
screw up against shoulder. Now pump can be reassembled.
8. Clean all threads with wire brush and file smooth any threads that may be nicked.
9. Use Never-Seeze or other graphite compound on threads before replacing grinder impeller.
10. Be sure cap screw in bottom of shaft is tight. Hold impeller with screwdriver between cutter bar and teeth of
shredding ring while tightening cap screw.
11. Be sure impeller turns free by hand after reassembly. Some drag will occur due to seals but there should be no
binding or tight spots when turning the grinder impeller.
12. ALWAYS use a rag on the impellers when turning to prevent cutting hands on the sharp corners of shredding
ring.
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