Posted by Shawn in PA on March 20, 2009 at 21:40:03 from (72.23.162.33):
This is my first time posting a message. Ive solved many of my previous problems via searching the archives... so thank you to all who contribute, but this one has me stumped. 1953 Super M converted to 12 volts over a year ago according to Bob M's instructions, with a new alternator and new wiring. The tractor ran and charged perfectly...until last week. I noticed my ammeter pegged on the postive side. The needle never returned to "0" and the battery was starting to boil over. Using a multitester I got 15.5 volts at the battery with the tractor running. Got the battery load tested and it came back good. I assumed that the voltage regulator failed. I changed the regulator out, had the alternator tested, and that too came back good. When I put the alternator back on the tractor, it's still boiling the battery and pegging the ammeter. I also have around a -9 amp draw on the ammeter when I pull the ignition switch out without the tractor running, which seems kinda high. It used to only be 3-4 amps. Starts and runs fine, but just pegs the meter and boils over the battery, even at an idle. I did replace the points and set them at .020. It has an upright delco distributor. If I disconnect the + side of the coil, the amp draw drops back to 3-4 amps. Could the amp draw be linked to the alternator overcharging... trying to compensate for the draw? Any ideas would be greatly appreciated. Thank you for your help and for your previous responses to other posts. Without them, my tractor would probably be permanent a lawn ornament.
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