Generator rebuild

T

tomfiii

New member
I have done all tests possible to my armature and growler test also and at one spot only it will not motor, acts like magnetic pull is wrong.. Anyone have any ideas?
 
Brother, you need either a WORKSHOP MANUAL or a specialized repair manual to follow correct diagnostics.

You will get twenty theories here and none of them will solve your problem.
 
A dead spot in an armature will require either a new armature or a rewind of the old part. With all parts back in serviceable condition, the field has to be flashed to remagenitize the field pole shoes in the proper polarity of the battery. It will generate enough voltage on residual magnetism to pull the cut out relay pole to the on position to bring the generator on line while turning.

A dead spot could be an open between the commutator and the winding or it could be a short to ground due to insulation coating break down. Even one dead segment can keep the armature from proper function. I'm not one for motoring a generator. They are not designed to be a motor and can overheat rather quickly. If they overheat then they can throw solder from the commutator sections. If a person decides to motor a generator then just do it momentarily. There are other ways to test one.
 
rotorwrench said:
A dead spot in an armature will require either a new armature or a rewind of the old part. With all parts back in serviceable condition, the field has to be flashed to remagenitize the field pole shoes in the proper polarity of the battery. It will generate enough voltage on residual magnetism to pull the cut out relay pole to the on position to bring the generator on line while turning.

A dead spot could be an open between the commutator and the winding or it could be a short to ground due to insulation coating break down. Even one dead segment can keep the armature from proper function. I'm not one for motoring a generator. They are not designed to be a motor and can overheat rather quickly. If they overheat then they can throw solder from the commutator sections. If a person decides to motor a generator then just do it momentarily. There are other ways to test one.
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As I said I have done all the tests per manuals.
 
If you've done all the tests and can't isolate the trouble, the fact that only one spot will not allow the gen to motor tells us the armature has to be the problem. Nothing else will cause that to happen in only one spot.
 
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