641 workmaster 12 volt generator

I am having my original generator rebuilt to 12 volt. What do I need to do other than change the voltage regulator, starter solenoid and put a resistor in front of the coil.
I know that lights might be an issue later however they are not currently hooked up.
I appreciate any help in advance. [/quote]
 
(quoted from post at 10:02:34 10/16/18) I am having my original generator rebuilt to 12 volt. What do I need to do other than change the voltage regulator, starter solenoid and put a resistor in front of the coil.
I know that lights might be an issue later however they are not currently hooked up.
I appreciate any help in advance.
/b][/quote] expect that the fuel gauge will be a problem on 12v.
 
The 600/800 Series, built 1955-1957, used the 6V/POS GRN Electrical System. The 6V generator used a Voltage Regulator. The '01' Series were built 1957-1962. I am unsure when they went to the 12V generator but believe they also used a VR. On a 12V switch over job using the 6V system, you eliminate the generator and VR altogether, opting to install a 12V alternator and using a 12V coil. Also, I don't think you need any external resistor. If lamps are 6V, you need to change out to 12V lamps. If you apply 12VDC to a lamp rated at 6VDC, you will permanently let the smoke out of them. OHM's LAW. If you have 12V lamps, and apply 6V power to them, you will not blow them but will have low illumination. Just curious as to why you want to switch over? It is your tractor and you can do anything you want with it, true. Does it start and run fine now on 6V?

Tim *PloughNman* Daley(MI)
 
Ok.. Lamps and due gauge as mentioned.

6v starter solenoid is fine.

I'd get a 15$ Napa ic14sb coil vs a 6$ resistor.. Less connections..

Get a vreg for a diesel and you are set.
 
He probably wants to change to 12V because he knows that a 12V system with an alternator is Superior to a 6V system for a host of reasons - as you well know.
 
(quoted from post at 14:15:34 10/17/18) He probably wants to change to 12V because he knows that a 12V system with an alternator is Superior to a 6V system for a host of reasons - as you well know.
riginal poster said, "I am having my original [b:36cafee9ad]generator[/b:36cafee9ad] rebuilt to 12 volt.".
 
(quoted from post at 09:03:43 10/17/18) The 600/800 Series, built 1955-1957, used the 6V/POS GRN Electrical System. The 6V generator used a Voltage Regulator. The '01' Series were built 1957-1962. I am unsure when they went to the 12V generator but believe they also used a VR.
Tim *PloughNman* Daley(MI)

The '01 series and 4 cylinder 2000/4000 series gasoline engine models all had 6 volt positive ground systems from the factory. The diesel models of those series all had 12volt systems with a generator and eternal Voltage Regulator from the factory, and I think, but I'm not 100% sure, that those 12 volt diesels were positive ground.

The 1965-1974 2000/3000/4000/5000 series all had 12 volt negative ground systems with a generator and an external VR.

The 7000 series was the first, I believe to use an alternator, but they still had an external VR, as did the 1975 + x600 series.

I think it was the xx30 series where they started to use alternators with internal VR's.
 
(quoted from post at 20:42:48 10/17/18)
(quoted from post at 09:03:43 10/17/18) The 600/800 Series, built 1955-1957, used the 6V/POS GRN Electrical System. The 6V generator used a Voltage Regulator. The '01' Series were built 1957-1962. I am unsure when they went to the 12V generator but believe they also used a VR.
Tim *PloughNman* Daley(MI)

The '01 series and 4 cylinder 2000/4000 series gasoline engine models all had 6 volt positive ground systems from the factory. The diesel models of those series all had 12volt systems with a generator and eternal Voltage Regulator from the factory, and I think, but I'm not 100% sure, that those 12 volt diesels were positive ground.

The 1965-1974 2000/3000/4000/5000 series all had 12 volt negative ground systems with a generator and an external VR.

The 7000 series was the first, I believe to use an alternator, but they still had an external VR, as did the 1975 + x600 series.

I think it was the xx30 series where they started to use alternators with internal VR's.
ell, you did pretty good, and you did say, 'I think', so can't hold anything against you.
"The '01 series and 4 cylinder 2000/4000 series gasoline engine models all had 6 volt positive ground systems from the factory. The diesel models of those series all had 12volt systems with a generator and eternal Voltage Regulator from the factory, and I think, but I'm not 100% sure, that those 12 volt diesels were positive ground. " When they went to 12v, they also went to negative ground.......just for the record.
 
When they went to 12v, they also went to negative ground.......just for the record.

Thanks for the clarification. I never actually worked on a prior diesel. I wasn't sure whether they stayed with positive ground on those 12 volt diesels just to keep everything the same in terms of polarity across the line-up or not. I know it doesn't really make a difference as long as the generator is polarized properly for either type of ground.
 

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