Fixing appliance motors from flood damage
If your major appliance was immersed in water up to the motor, it's probably repairable.
Most appliance motors contain felt pads soaked in oil to supply the bushings for the life of the motor. They also may have internal splices and a centrifical switch.
Water in the motor will replace the oil in the felt pads. If the motor is turned on, the bushings will get a good supply of water,thus destroying the bushings. Even if the motor is air dried for days, the felt pads will still have water in them!
If the motor was turned on, it probably is not fixable. Also, dirty water will contaminate the centrifical switch and provide a leakage path for electicity to flow in other areas like internal splices.I have seen motors blow open due to this leakage current.
To repair, remove the motor and place in an oven at 200 degrees for 3- 6 hours. Remove and let it cool down.
With a "Zoom spout oiler" Part # 55191 (with non degergent oil) squirt oil on both shaft ends and hold it vertical to ensure the oil reaches the internal felt pads. You can oil the pads inside if it's an open frame motor. Just be carefull to keep oil away from the centrifical switch.
Remove the centrifical switch, remove the cover and activate it several times while spraying it with a non-residue cleaning spray available at Lowes. Most appliance switches have a removable cover. If sealed, locate any opening like a housing seam and just squirt in there, spray should seep inside. I use QD contact cleaner by CRC If a dryer motor, check pins 1 and 2 for continuity when switch is not actuated. Most switches are not available new. If it does not work, sometimes you can stick a piece of fine emory paper between the contacts to clean them.Activate the switch to put pressure on the emory paper. Do not use heavy emory paper, the contacts could ark weld shut. Squirt more cleaner in there to flush out particles.
Bench test the motor and verify it will draw rated current.Most dyer motors draw about 4.5 amps with no load. Let it run for some time and verify it reliably starts.If a reversing motor, it would be easier to test it in the unit. If a direct drive washer motor, put it in spin and check washer current, should be between 8 and 10 amps. If it passes these tests, it should be ok. Good luck.
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Last edited by richappy : 07-04-2009 at 09:22 AM.
Reason: add details
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