AMT 1641-162-90 Mechanical Seal - Viton Type 6A

The AMT 1641-162-90 is a Mechanical Seal, Viton, Type 6A, size 3/4 Inch for an AMT Pump. MECHANICAL SEAL REPLACEMENT
Always replace both seal seat and seal head to insure proper mating of components! It is recommended that impeller seal also be replaced when replacing shaft seal. 1. Unthread fasteners and remove casing and casing seal . 2. Unscrew impeller fastener from motor shaft to prevent shaft from turning. Other motor shafts have a screwdriver slot instead of flats. 3. Unscrew impeller from motor shaft. Remove the impeller seal. Also, remove shims DO NOT LOSE SHIMS. 4. Pry seal seat from recess of impeller. Use caution so as not to damage or remove seal seat pin on Teflon seal equipped units. 5. Remove the adapter and casing cover by unthreading fasteners . 6. Press seal head from rear of casing cover. 7. Clean casing cover and impeller seal recesses and motor shaft. Make certain all surfaces are perfectly clean before installing new seal parts. Handle seal parts with extreme caution and keep them clean. Do not touch polished seal faces with your hands. Do not apply lubricants on seal faces. This could cause a leak or premature seal failure. 8. Apply a light coat of sealing compound to new seal head and press it into casing cover recess using proper size tube or installation tool . DO NOT press on carbon face or top of metal cup of the seal head. Install using flange only. 9. Slide adapter and casing cover assembly onto motor mounting face. Attach with fasteners. 10. Press new seal seat squarely into impeller recess. Align slot in seal seat with seal seat pin on Teflon equipped units. Avoid scratching polished surface. NOTE: Use a soft, clean piece of cloth on seal seat face when installing to prevent marring. 11. Replace any shim washers which may have been removed in disassembly . Screw the impeller back in place, tightening until it is firmly seated. 12. Install impeller seal and install and tighten impeller lock nut. 13. Reinstall seal on casing cover rabbet. Remount casing with fasteners.1-1/2 Inch Self-Priming Centrifugal Pumps NOTE: Always flush pump thoroughly before use so as not to contaminate liquid being pumped. If impeller is replaced, seal assembly should also be replaced as seal is usually damaged in disassembly. Also replace impeller washer.