Generator/field

I have a problem with "exciting' the field on my 6 volt positive ground generator. The generator has been rebuilt and checked for operation twice ( I saw it working with my own eyes), installed new voltage reg. new wiring harness, checked and double checked wiring. It's ok. One way to get positive amp flow thru amp meter is to remove field wire from reg terminal and touch it to "bat" terminal, or jump from starter silenoid to field terminal on gene. Otherwise no amps + or - show on amp meter. Any suggestions ?

Doesn't sound right.
First of all, what type (make & model of generator, type of tractor, etc.)of generator is it? You don't give much information. Is it a two-brush generator, or a three-brush?
Most generators do not power the field, the field is taken to ground through the regulator.
What happens when you touch the Field wire to ground while its running?
You might even have a poor ground to the generator through the frame...actually, this sounds like it could be the basic problem.
In short, more information, please.

FIRST of all, when you installed the genny did you POLARIZE IT to match your tractor PolArity?? I ask because if it were at a shop how do you know they used same Polarity as your tractor???

I would to be safe Polarize it by momentarily flash jumping (use lil jumper wire) from BAT on the VR to ARM/GEN and you should get a spark.

I DONT LIKE JUMPING HOT BATTERY VOLTAGE TO THE GENNYS FLD that sounds "very wicked" to me assuming this is a Class A charging system. The FLD post is looking for a ground return path to complete the circuit so current flows through the gennys field windings. The first of the 2 series field windings gets its voltage from the ARM post (or third brush if a 3 brush genny) and then exits out the FLD post to which the VR supplies the needed ground.

If you wanna force it to high max charge (for a Class A system) YOU NEED TO MOMENTARILY ATTACH THE GENNYS FLD TO GROUND NOTTTTTTTTTTTTTT BAT

If a genny is at opposite polarity from the battery you can damage the VR !!!!!!!!!!!

The VR CAN NOTTTTTTTTT WORK UNLESS IT HAS A GOOD CASE/FRAME GROUND, INSURE THAT !~!!!!

You may have damaged the VR or genny by what you did (unless its a Class B like some Fords used) soooooooooooooooo I suggest you POLARIZE THE GENNY,,,,,,,INSURE A GOOD VR GROUND,,,,,,THEN run my Troubleshooting Procedure if its a Class A system

BE SURE N RUN MY PARA 5 VR BY PASS TEST TO SEE IF THE GENNY IS OKAY INDEPENDANT FROM THE VR
you basically dead ground the gennys FLD (if Class A) post n see if she charges then

http://www.ytmag.com/cgi-bin/viewit.cgi?bd=farmall&th=665110

John T
John Ts Charging Troubleshooting

"A" or "B" system ???
An A based charging system uses internal connection to a brush (or a third brush to energize the field. A "B" style uses an internal ground, and an external voltage to the f terminal for energizing. Some early fords are A type, later are B type.
If the gen wires are disconnected, and if the brushes are held up off of the commutator with a slip of plastic, an A generator will conduct from the Arm terminal to the F terminal (less than 5 ohms).
If it is a three brush, it will conduct from the third brush to the F terminal.

If it is a B system the F terminal will show less than 5 ohms to case ground, and the Arm terminal will show open (with the brushed off of the commutator. Jim