AMT 1643-411-00 - EPT

The AMT 1643-411-00 is a 75 Ept/Car/Cer FS16 Seal Assembly for an AMT Pump. MECHANICAL SEAL REPLACEMENT
REMOVAL OF OLD SEAL IMPORTANT: Always replace both seal seat and seal head to ensure proper mating of components. Also, impeller seal should be replaced anytime impeller fastener has been removed. 1. Remove fasteners connecting casing to adapter . 2. Slide casing off of adapter locating boss. Take care when removing casing, it may be heavy. Care should be taken not to pinch or shave casing o-ring between seal plate and casing. 3. Use a box wrench and/or socket wrench to remove impeller fastener. Remove impeller seal and impeller . NOTE: Stub shaft must be held in place to remove impeller. Insert a hex key through adapter opening into one of the screws fastening shaft clamp to motor/stub shaft. Brace hex key against side of adapter opening. Impeller and impeller fastener unscrew CCW when looking at the impeller eye. 4. Disconnect any piping or venting apparatus attached to seal plate 1/8 NPT wash/vent port. 5. The seal head can now be pulled from shaft. Remove seal plate from adapter. 6. Pry seal seat from cavity in seal plate. INSTALLATION OF NEW SEAL The precision lapped faces of mechanical seal are easily damaged. To prevent leaks, handle replacement seal carefully. Do not touch seal mating faces. IMPORTANT: Be sure that shaft does not damage polished seal faces. 1. Thoroughly clean all surfaces of seal cavity in seal plate. 2. Using clean cloth, wipe shaft and make certain that it is perfectly clean. 3. Wet rubber portion of new seal with a light coating of soapy water. While wearing clean gloves or using a clean rag, press seal seat squarely into seal place seal cavity. Use cardboard washer , place over polished seal surface and use a piece of pipe or dol rod to press seat in firmly but gently. Avoid scratching polished face. 4. Dispose of cardboard washer. Check again to see that polished face is free of dirt and all other foreign particles and that it has not been scratched or damaged. 5. Install seal plate onto shaft and seat against adapter. Align 1/8 NPPT seal wash port if port is being used. 6. Wet inside rubber portion of new seal head with a light coating of soapy water. Slide head onto motor shaft with sealing surface facing seal seat. NOTE: A short run-in period may be necessary to provide completely leak-free operation. 7. Screw impeller onto shaft. Hold stub shaft with hex key when tightening impeller and impeller fastener. 8. Check if shaft turns freely by spinning impeller. 9. Slide impeller seal onto exposed shaft, screw impeller fastener onto shaft with thread sealant applied Threadlocker Medium Strength Removable) and tighten. 10. Place casing seal on seal plate raised boss. Slide casing onto seal plate and adapter. 11. Attach casing using fasteners with thread sealant applied Threadlocker Medium Strength Removable). Spin motor shaft to check for interference with casing. Seal will produce minor drag when spinning motor shaft, but rubbing anywhere else must be eliminated! Otherwise, damage to pump and/or motor may occur.