Operating Instructions and Parts Manual

Models 020598 and 020599

Maintenance (continued)

IMPORTANT: Always inspect all seals when unit is disassembled. Replace when rubber is hard, cracked, or worn. When reassembling parts with o-ring seals or gaskets, it is sometimes helpful to apply a small amount of soapy water on o-ring so that parts slide over o-ring without pinching or shaving it.

SHIM ADJUSTMENT

When installing a replacement impeller or mechanical seal, it may be necessary to vary the number of shims (Ref. No.

21)that will be required. This is easily done by adding one 0.010" shim more than was removed, and reassembling pump as described.

Ensure that casing is snugly in place and check shaft to make sure it is turning freely. If it turns freely, check to ensure that adapter (Ref. No. 3) and casing (Ref. No. 15) are fitted tight together. If they are not, tighten fasteners (Ref. No. 16) and recheck shaft for free turning. Tighten carefully, turning shaft while tightening. If shaft seizes before fasteners (Ref. No. 16) are completely tight, disasseble pump and remove one shim and repeat reassem- bly.

If any time during above operation shaft does not turn free, follow procedure indicated above and repeat proce- dure.

Above procedure ensures that pump will have proper running clearance (less than 0.010") between impeller and casing and perform like a new unit with new impeller or motor.

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