I am putting a 6 volt 2 brush ford generator on my old tractor. I have polarized it. No matter how I check to see if the generator output it shows a discharge. I tried motoring the gen and it does but turns the opposite way the motor funds. Can I change it or should it generate in either direction??
- Thread starter JJC
- Start date
Janicholson
Well-known Member
With the generator mounted to the tractor, and well grounded through its mount, (clean shiny), but not connected to the regulator, put a volt meter from
the Field terminal on the gen to a clean and shiny ground. Set the meter at 20 volts scale. Take a #10 solid wire from the negative battery (Hot) post
and touch the Arm terminal on the generator. It will spark but it is OK to hold it there one second. Watch the meter. If it displays voltage, it is an
"A" circuit generator. If nothing, or a tiny pulse then nothing, it is a "B" circuit generator. We need to know. Jim
the Field terminal on the gen to a clean and shiny ground. Set the meter at 20 volts scale. Take a #10 solid wire from the negative battery (Hot) post
and touch the Arm terminal on the generator. It will spark but it is OK to hold it there one second. Watch the meter. If it displays voltage, it is an
"A" circuit generator. If nothing, or a tiny pulse then nothing, it is a "B" circuit generator. We need to know. Jim
Janicholson
Well-known Member
A "B" Type generator has an internally grounded field. The field terminal is connected to regulated current flow from a Regulator designed for the B circuit.
Ih the Type A, the regulator grounds the field, which is supplied inside the generator. The generator might have a number on it which would cross to the correct
VR. It will be fine with the VR that matches it. (maybe a 1954 Ford) The battery connection still goes to the amp meter load terminal (not the battery side
which connects to the starter switch battery terminal. Make sure a note is placed on it some where to indicate the change. (or the manual), Jim
Ih the Type A, the regulator grounds the field, which is supplied inside the generator. The generator might have a number on it which would cross to the correct
VR. It will be fine with the VR that matches it. (maybe a 1954 Ford) The battery connection still goes to the amp meter load terminal (not the battery side
which connects to the starter switch battery terminal. Make sure a note is placed on it some where to indicate the change. (or the manual), Jim
A Class A has the first Field connected to the same place the ARM post is connected,,,,,,,,,,then it goes through the first field,,,,,,,,,,,,,, then splices to the second field,,,,,,,,,,then goes to the FLD post
A Class B first field connects to the FLD post,,,,,,,,,,,splices to other field,,,,,,,,,,then its internally grounded
You have to have the same VR as the genny Class A or Class B OR IT WONT WORK
Hope this helps
John T
A Class B first field connects to the FLD post,,,,,,,,,,,splices to other field,,,,,,,,,,then its internally grounded
You have to have the same VR as the genny Class A or Class B OR IT WONT WORK
Hope this helps
John T
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