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Farmall & IHC Tractors Discussion Forum
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Re: Farmall A Cutout Relay Question ...

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Jim Becker

11-28-2012 18:30:23
173.74.120.222



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Not quite sure what you are saying there Gene. I can't say what the wiring actually looked like when they came out of the factory. By the time I was old enough to understand these systems, they had all been out in the field a while.

IH had several different wiring diagrams, just for the A and B, not to mention all the other models. They had starter no lights, lights no starter and both. They had diagrams for adding lights to a starter system and for adding starter to a lighting system. There was one thing common to every one I have ever seen. If there were no lights, the two F terminals were jumpered together. If there were lights, nothing was connected to the cut-out F terminal.

I have in front of me the instruction manual for starting, lighting and starting - lighting for the A, B and BN. Maunual ID: INT 5402. 5-6-41-2B. On page 17, in the section for adding lighting to a tractor with a starter, it says:

"Remove short lead connecting field "F" to field connection on control box. Connect generator field to switch cable directly to field terminal on generator frame."

It says something similar for each other section that includes lights.
It also has an illustration of the tag shipped on the generators. It shows the jumper from F to F. I suppose the originals you have found with the jumper had the lights field installed and the installer didn't read the instructions.

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gene bender

11-28-2012 20:42:45
207.177.56.85



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 Re: Farmall A Cutout Relay Question ... in reply to Jim Becker, 11-28-2012 18:30:23  
The page you show is for a SA and they used a different generator with a REG unless its talking about the early ones as they could have used a cut-out as the early Cs also used a cut-out. I have never read when they did change from cut-outs to regs. I do know there is a reg listed in parts books for the three brush gennys 1101355 and 423. The later gens 1101501,531 take a different reg. There are a couple of Bs still original in my area wired with field going to the terminal on the cut-out also two early low serial #s Cs with cut-outs. I have redone the wiring on and early Cub and a B that came from gen shop wired from rebuilt shops and both of them came with wires connected checked out and ready to instal. Ive always connected the field to the cut-out as thats the way ive seen them and you sure can tell when its original wiring. The systems work and its quite a deal after 60pluss yrs to have an original system still working some owners took great pride in keeping tractors inside and in good repair.

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Janicholson

11-28-2012 18:50:47
67.72.98.45



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 Re: Farmall A Cutout Relay Question ... in reply to Jim Becker, 11-28-2012 18:30:23  
Precisely. Jim



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