Posted by John B. on February 26, 2013 at 08:37:51 from (38.114.64.177):
In Reply to: Cub 12 volt conversion posted by Ted Dawson on February 26, 2013 at 07:22:38:
Ok Ted so your 6 volt system isn't charging. I'll try to walk you thru a few steps to decide what component is your problem.
1. With the engine & generator running wide open throttle. Take a test light and hook it up to battery feed cable-not battery ground to the frame. Then take your test light and touch it to the "A" terminal on your generator. If the light comes on the generator is not charging.
2. With the engine & generator running wide open use a wire and ground out the "F" terminal on the generator to the tractor frame or battery ground momentarily while holding your test light on the "A" terminal again. If the light goes out the generator is good. You may need a 2nd person to help you with this test procedure.
3. If step two shows a good generator I would say your regulator is most likely bad or has a bad connection which is usually to ground. 4. If your generator tests to be good. I then would use a battery trickle charger and hook up to the ground on the battery and the appropriate lead I would hook to the battery terminal on the voltage regulator then check to see if the meter on the charger is showing an output if so then I would check the amp meter on the tractor which should be showing some charge going thru it. The battery charger is taking the place of the generator for the time being. I use a charger to check my trailer lights all the time. It's easier to use it than hook up my truck to the trailer.
5. The generator and mounting bracket along with the voltage regulator all need a good connection to the tractor frame at all times to make it functional, this will be true with a 12 volt alterntor system as well. The only difference you'll get with an alternator is it will charge better at an idle.
I know what I've explained here is very blunt or vague but after working on old equipment with generators and reading about them in the old Motor Books I have developed these short cuts to quickly diagnose them. My dad and I have had Farmalls with 6 & 12 generators on them. We've never had any problems with them. We always kept the connections clean. A little understanding of electrical circuits is helpful but not required. My email is open I can scan and email the info on generators if you like.
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