AMT 5771-300-90 Seal Kit

The AMT 5771-300-90 is a Seal Kit for an AMT Submersible Contractor Pump. MECHANICAL SEAL REPLACEMENT
Motor internals are protected from contact with liquid being pumped by a mechanical shaft seal and oil cavity. When seal wears out, potential motor life will be compromised. Therefore, periodic seal replacement is recommended. Time interval between replacements will depend on abrasiveness of liquid being pumped, temperature, total accumulated runtime, etc. IMPORTANT: Always replace seal head and both seal seats at same time to ensure proper mating of components. Refer to Figure 2 1. Disassemble pump by following directions in both Power Cord Replacement and Impeller Inspection / Replacement sections. 2. With unit on its side and wire cover, pump assembly and impeller removed, lift shaft key from shaft/rotor using a pliers. 3. Clean rust and buildup from unit. 4. From top of unit, remove four long fasteners , which attach lower end bell to motor case . 5. Rap on ears of lower end bell with a soft mallet to break it free from motor case. Next, carefully guide lower end bell along with shaft/rotor and bearing assembly out of motor case. 6. Drain oil from seal cavity by removing drain screw and seal from seal plate . Then tip components upright overtop of a catch pan until oil is drained. 7. Remove three fasteners and pry out seal plate with screwdriver. Slinger washer will come free at this time. 8. Use a press or gear puller to remove shaft and bearings from lower end bell. Shaft seal head will now be free. IMPORTANT: Shaft seal head has unique ends and the two seal seats are different from one another 9. Remove upper seal seat from lower end bell by using a screwdriver or dowel to press on seal from rear. Do the same for lower seal seat in seal plate. 10. Clean seal seat cavities before inserting new seals. 11. Carefully wipe polished surface of new seal seats with a clean cloth. 12. Wet outside of rubber portion of seal seats with a light coating of soapy water. 13. Press each new seal seat squarely into cavity in both seal plate and lower end bell. 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. 14. After each seal seat is in place, be sure that it is clean and has not been marred. 15. Using a clean cloth, wipe shaft and make certain that it is perfectly clean. 16. Carefully guide motor shaft through seal seat and use a press to seat bearing back into lower end bell. 17. Apply a light coating of soapy water to inside rubber portion of seal head and slide onto shaft . 18. Place seal plate back onto lower end bell being careful to guide shaft and avoid damage to seal seat. Secure with fasteners. 19. Press slinger washer back in place. 20. Refill cavity with oil through fill hole and reassemble in reverse order