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Re: Farmall C Charging Problem
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Posted by Bob on July 10, 2005 at 00:19:53 from (64.21.249.40):
In Reply to: Farmall C Charging Problem posted by Brian Schmidt on July 09, 2005 at 20:18:12:
You DO NOT polarize a regulator, you polarize the GENERATOR, (even though you may be making the connections at the regulator to do the polarizing). Polarizing restores the residual magnetism in the generator's polepieces AND restores it in the correct direction, so the generator will charge with a polarity matching that of the battery. Before starting the tractor, put a GOOD jumper wire from ther generator's "F" terminal to a good chassis ground. Be sure the connections are clean at both ends, and making good contact. If the generator charges at startup (it will be full-charge with the jumper wire in place), it points to a bad regulator, specifically dirty points on the voltage/current regulator unit, or even a bad ground. If the generator DOES NOT charge at start-up full fielded in this manner, it points to generator problems, which could range from a dirty commutator/bad brushes to a bad solder joint on one of the commutator bars, to a shorted winding. Conductive debris between commutator segments can cause this problem. Try cleaning out the "undercuts" between the commutator bars with a broken hacksaw blade that has been ground thinner to match the thickness of the groove between the segments. The use of an armature testing device called a "growler" can check for several of the previously mentioned problems.
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