Posted by T.C. in TX on September 04, 2007 at 16:29:40 from (71.42.188.84):
I recently purchased an old Allis-Chalmers M-100 Motor Grader. Noticed the amp-meter reads discharge instead of charge when the engine is running. Checked the batteries--sure enough they are hooked up with a negative ground.
According to the manual this is supposed to be a positive ground system. Question is what do I need to do other than reverse the cables? It is a 24 volt system with 2-12 volt batteries connected in series. Looks like the batteries are fairly new and I do not know how long it has been running with the electric system reversed. The machine has a generator and voltage regulator which are likely original equipment.
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