Posted by John T on September 21, 2007 at 07:38:06 from (66.244.83.147):
In Reply to: H Overcharging posted by MarkOhio on September 20, 2007 at 23:53:01:
Whether or not it can still charge with an internal Field ground short depends on where the short is located. One suspect (unless its a winding to pole piece short) is where the 2 field windings splice and another chance where the last winding goes to the Fld post. Based on what you say UNLESS theres a short in the wire from the gennys Field to the Light switch (Bobs suggested unhook the wire test will quickly show that) it must be shorted somewhere electrically near the connection to the gennys Fld post.
If its a three brush genny one can relocate the third brush for a lesser rate charge also.
If you remove all the gennys external wiring connections an ohm meter might tell something. With one lead to case/frame and probe the other, Id expect very low ohms on the Arm post (if brushes n arm all okay) and maybe around 1.5 to 3 ohms on the Field post. If the Field shows around 0 Id look for an internal short close to where the field winding wires to the Field post and/or suspect a short in the pass thru stud insulator right at the Fld post. Come to think of it if she always charges at max rate and theres NOT an external wiring short to the light switch, a short where the Field post passes through the gennys case IS A PRIME SUSPECT.......
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