Generator

[dave 87]

12v generator on oliver 770 is it 12v reg or 12v positive ground

 

[rustred]

how is it hooked up now? i would persume its neg. ground by the time these tractors came out. how is the coil hooked up?

 

[J. Schwiebert]

all Oliver tractors with a generator from the factory were positive ground. Questions?

 

[dave 87]

What has to be done to make 12v reg

 

[BarnyardEngineering]

You mean negative ground?

1. Swap the + and - cables on the battery so the - is connected to the frame.
2. Swap the connections on the ammeter.
3. Repolarize the generator.

If it's all the original mechanically-regulated electrical system it is not sensitive to polarity. You can switch back and forth no problem. Can't do that with anything electronic/solid state, though.

 

[John T]

12 volt reg

If youre asking how to change to NEG Ground ???

You would swap/reverse ammeter connections,,,,,,,,,swap/reverse coil leads,,,,,,,,,Polarize the genny (BEFORE starting)

HOWEVER unless you have an elec ignition or some other elec components that require NEG ground, why convert ???? it can work and charge at either polarity once you do the above

NOTE some VR's are designed specific for POS or NEG ground

John T