How To Rebuild An Electric Motor

This is part 3 of a ser.

How to rebuild an electric motor.

This advancing magnetic field gives the rotor something to chase causing the rotor to spin. Ac motors are generally reliable and last a long time before needing to be replaced. Electric motor test repair guide. Here we provide an electric motor diagnostic table a troubleshooting guide that helps diagnose and repair most electric motor problems for motors found on hvac equipment in buildings such as air conditioners furnace or air handler blower fans oil burner motors well pumps and condensate return.

If the internal windings burn out your ac motor needs to be checked out professionally. In reality it is a cheap low powered motor that sells for about 1 or 2 so maybe you ask what is the reason to fix small electric motor by yourself. I cover the symptoms and how to fix three of the most common motor problems for dc and ac motors found in power tools and appliances. The only user serviceable parts on an ac motor are the brushes and the bearings.

You now know how to rebuild an electric motor so that it is as good or better than new. Electric motors are relatively simple mechanical devices but rewinding them isn t in fact it s one project that s usually best left to the professionals. Capacitor start electric motors use a starting coil and a capacitor to create an advancing magnetic field in the stator outer frame of the motor with its coils. Your electric motor should now be assembled once again.

This will seat the brushes firmly into their place. The last step is to break in the motor by hooking it up to a 2 to 3 volt power source and run it for 10 minutes or so.