1st-rebuild
New User
I want to convert my 6v system to a 12v system, what all needs to be changed?
- Thread starter 1st-rebuild
- Start date
Will Herring
Well-known Member
What tractor, and how is the existing system set up?
Ultradog MN
Well-known Member
- Location
- Twin Cities
At a minimum, generator, coil and headlights.
Coil could even be reused if you find the right resister.
6V solenoid will last a long time running on 12V as long as you don't crank on it too long.
Starter too.
Best way to convert is with a GM style 10SI alternator - either 3 wire configuration or one wire config.
3 wire uses an idiot light so you know if it is charging and will start charging immediately.
1 wire is just that - one wire to the battery connection but you need to rev the engine up to about 1500 rmps for a moment or two to get it to start charging. Ok if you remember to do it.
Do a google search for 10SI wiring diagram and you will find several diagrams that will help.
Coil could even be reused if you find the right resister.
6V solenoid will last a long time running on 12V as long as you don't crank on it too long.
Starter too.
Best way to convert is with a GM style 10SI alternator - either 3 wire configuration or one wire config.
3 wire uses an idiot light so you know if it is charging and will start charging immediately.
1 wire is just that - one wire to the battery connection but you need to rev the engine up to about 1500 rmps for a moment or two to get it to start charging. Ok if you remember to do it.
Do a google search for 10SI wiring diagram and you will find several diagrams that will help.
1st-rebuild
New User
his is a 1951 jd model m, so I change the gen. to an alternator and the regulator and coil and lighting correct
1st-rebuild
New User
ok that posted on the other guys info. it's a 1951 jd model m, so I need to change the gen. to an alternator and change the coil, regulator and lights correct ?
gene bender
Well-known Member
gat your starter refreshed and some 1ga cables and you wont need to change to 12v
Ultradog MN
Well-known Member
- Location
- Twin Cities
Not to start a fight RR but for starters, an alternator charges at a lower speed, puts out more amps, requires zero maintenance, lasts longer, is more reliable because it is internally regulated by solid state electronics instead an old fashioned VR that you can't buy a good one anymore and it's easier to wire a 10si.
1st-rebuild
New User
why I was asking in the first place I am at a point to replace the regulator because it is so rusted and not sure if it works and I haven't purchased the battery yet so I was thinking now is the time to convert if I was going to
I just go to parts house and tell 'em that I need a resistor for a '67 Dodge with a 383 ...... seems to be the right resistance - I recall reading a post that gave the resistance for Ford, GM & Mopar and the guy opined (from experience) that the Mopar was the right one for old 6v tractor coils - I've had good luck with them. My 2¢
Just finished a Farmall H and starting on a Farmall Super M. Took my generators to a alternator/generator/starter repair place and he changes out the field coils to make them into 12 volt. With a new regulator he is doing them for $115. Very reasonable price which you might have a hard time finding a place that low. On the Farmall H, I could not believe how easily it cranks and starts with the 12 volt battery. 12 volt battery fits right in the original battery box. Generator maintains original appearance while using the new but original wiring harrness. Yes, I could have put a 12 volt generator on from a newer tractor like a Farmall 450, but having them rebuilt assures me that the generator is good.
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