AMT 1640-161-93 Mechanical Seal - Buna-N Type 11A

The AMT 1640-161-93 is a Mechanical Seal, Buna-N, Type 11A, size 5/8 Inch for an AMT Laundry Tray Pump. MECHANICAL SEAL REPLACEMENT
After pump has been in service for a long period of time, or if pump has been in severe service, it may be necessary to replace shaft seal assembly . Leakage can be detected by a dripping or flow of liquid from area around motor shaft . The precision lapped faces on shaft seal assembly are easily damaged. Handle your replacement seal carefully and read these instructions before attempting to replace seal. Refer to Figure 5 for Parts Illustration. 1. Disassemble casing and casing seal from adapter by removing fasteners . 2. Notice the location of impeller on shaft. It should be compressing seal cartridge . Loosen fastener and impeller will slide off shaft. 3. Pry seal seat from impeller recess with a small 4. Press old seal cartridge out of adapter by pushing from motor side. NOTE: Use a 11/4 pipe or a socket from a tool set. 5. Clean adapter seal cavity before inserting new seal cartridge. 6. Carefully wipe polished surface of new seal seat with a clean cloth. 7. Wet the rubber portion of seal seat with a light coating of soapy water. 8. Press seal seat squarely into cavity in impeller as illustrated. If seal seat does not press squarely into cavity, it can be adjusted in place by pushing on it with a piece of pipe. 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. 9. After seal seat is in place, check that it is clean and has not been scratched or cracked. 10. Replace seal cartridge. A sealing compound may be used to insure a water tight fit on outside of cartridge. 11. Mount adapter on motor mounting face. 12. Replace impeller, tightening it securely with fastener in approximately same position it had been before disassembly. . 13. Make sure casing seal is in place on adapter. 14. Replace casing, tightening securely with fasteners. Figure 4 - Mechanical Seal ROUTINE Pump should be checked daily, weekly, monthly, etc. for proper operation. If anything has changed since unit was new, unit should be removed and repaired or replaced. Only qualified electricians or service personnel should attempt to repair this unit. Improper repair and/or assembly can cause an electrical shock hazard.