6 to 12 volt conversion

[skidmoreo]

Does anyone have a electrical diagram for this. 1949 cub??

[tractorpoor]

Here is one for a one wire alternator.

[Jim Becker]

If you have a magneto and will continue to use it, ignore the ignition system part of that diagram.

[Lt.Mike]

I did the conversion on my Lo-Boy some 10 years back and it’s been perfect since.
Paula’s Cub was converted by the PO and it was clear he didn’t have a clear understanding on how to do it as he did install a new coil but it was a 6v. Changing that made the tractor run right but there’s still a voltage drain when parked. If I don’t pull a cable I’ll have a dead battery.
I notice the diagram doesn’t have a diode in the line from the alternator that mine has. It came with my kit. I haven’t taken the time to go over the wiring in her Cub but I’m wondering if there isn’t one on her tractor that it might be contributing to the battery drain.

[Lt.Mike]

One other note on the diagram is that most 12v coils have an internal resistor and will state it on the coil so you won’t need the external ballast resistor.

[SONNY]

Batt. drain when stopped is usually from the exciter circuit of the alternator not being turned off. IF the wire is not hooked to the right kill wire---it will discharge the batt. ---got a messed up new-holland skidloader that way. I just hooked it to the starter switch, BUT being a Deutz diesel, you still have to remember to turn the key off! lol!! ---some day I might get around to running it a different way, but doubt it!--I just always remember to turn key off!--well cept one time 13 miles from home and no jumper cables with me!, ( long story) LOL!