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John Deere Tractors Discussion Board

Re: Generator


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Posted by John T on July 01, 2013 at 04:10:11 from (216.249.76.176):

In Reply to: Generator posted by 1949ABG on June 30, 2013 at 20:19:31:

When she spinned good n smooth n even with voltage on ARM and case with FLD grounded that says the armature and brushes and bushings are at least decent shape, but if she didnt speed up some when you ungrounded the Field Id suspect a Field winding problem. It may be simple like a short to case or a break open there where the 2 splice in the middle or a problem at the FLD post pass through, I have seen them overtightened and broke or shorted out. Another problem may be one is shorted to case frame or theres an open in one of them??? If she has some miles on her a rebuild may consist of a new set of brushes, commutator turned down and mica undercut, field winding problem repaired. Id inspect and ohm out the fields, look for shorts to case or an open circuit (especially where they splice in the middle), before I gave up on her just yet..................

John T


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