Assessments - 2, GPA: 5
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4. Unthread cap screws (Ref. No. 5) and remove motor adapter (Ref. No. 3). Seal head (Ref. No. 9) and impeller shims (Ref. No. 10) will come loose at this time. NOTE: Casing cover will still be attached to motor adapter. IMPORTANT: Retain impeller shims for use when reassembling unit. 5. Push seal seat (Ref. No. 8) from casing cover with screwdriver. 6. Clean adapter recess before inserting a new seal seat. 7. Carefully wipe polished surface of new seal seat with a clean cloth. 8. Wet outside of rubber portion of seal seat with a light coating of soapy water. 9. Press new seal seat squarely into cavity in casing cover. If seal seat does not press squarely into cavity, it can be adjusted into place by pushing on it carefully with a piece of pipe or dowel. Always use a piece of cardboard between pipe and seal seat to avoid scratching seal seat. (This is a lapped surface and must be handled very carefully). 10. After seal seat is in place, insure that it is clean and has not been marred. 11. Using a clean cloth, wipe shaft and make certain that it is perfectly clean. 12. Carefully guide motor shaft through seal seat. Secure motor adapter on motor mounting face. 13. Apply a light coating of soapy water to inside rubber portion of seal head and slide onto shaft (with sealing face first) so that rubber portion is just up over shaft shoulder. Do not touch or wipe face of polished part of the seal head. 14. Replace any impeller shims which may have been removed in dis- assembly (see "Shim Adjustment"). 15. Screw impeller back in place, tightening until it is against shaft shoulder. Replace o-ring gasket and acorn nut. 16. Remount o-ring and pump casing on casing cover. IMPORTANT: Always inspect o-ring gasket for cracks or cuts when unit is disassembled. Replace if damaged. SHIM ADJUSTMENT When installing a replacement impeller (Ref. No. 11) or motor (Ref. No. 1), it may be necessary to adjust number of shims (Ref. No. 10) to insure proper running clearance between impeller and casing. Proceed as follows: NOTE: A proper running clearance is less than 0.010. 1. For impeller replacement, add one 0.010" shim in addition to shims removed originally. 2. For motor replacement, add two 0.010" shims in addition to shims removed during disassembly. 3. Reassemble pump using "Mechanical Seal Replacement" for reference. IMPORTANT: Insure that casing is in place and check shaft to make sure it is turning freely (use screwdriver slot or two flats at rear of motor to turn shaft). If it turns freely, check to insure that casing cover and casing are fitted metal-to-metal where they meet on outside. If they are not metal-tometal, tighten the hex nuts (Ref. No. 4) and recheck shaft for free turning. Tighten, carefully turning shaft while tightening so that motor bearings are not damaged in event that too many shims were installed. If shaft seizes before fasteners are completely tight, disassemble pump and remove one shim and repeat reassembly. 4294-251-00 08/2007 Specificat...
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