Question about Electrical Supplies
I have a Generac portable generator that will start and run fine, but there is no power. I checked the 3 breakers and they are fine and set. I checked the outputs with a meter. out of the 120v output I am getting 1.4vac and out of the 220 v output I am also getting around the same from each leg ? Are there any brushes or any other wear items that could go bad on the generator motor ? Any ideas where I should look ? Thanks in advance
Remove front cover on the genset and you will see the brushes and rings. Clean the rings if black with emory cloth and inspect brushes. Flash the fields by apply a 12V battery to the brushes. the brush closest to you or the bearing is connected to the positive side of battery and the back brush is negative. You have to do this with genset running. You should notice your voltage climb up to over 50Vac maybe even over 100Vac. Make sure to use rubber gloves when flashing fields and keep hands away from rotating parts. if voltage does increase when flashing the the voltage regulator is shot. If voltage does not climb then you will need a new genset or generator end.
Posted on May 15, 2009
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Posted on Jan 02, 2017
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