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A

asyrp43

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I'm tearing down the tractor to repaint and found this piece broken. Where can I get a new one or would I be able to glue it back together?

Thanks!
 
That is the ballast resistor. It reduces the voltage to the coil from 12v to 6v. It is widely available at auto parts stores, TSC etc. Just take the old one in with you and show it to the parts guys and they should be able to get you one.
Zach
 
I am not a 6 to 12 volt conversion expert as I have only converted a single Farmall H in that manner. The resistor I used (which worked great) was a RU12. The one thing I wanted to advise you on if your newly installed resistor behaves in the same manner as mine did expect some significant white smoke rising above the resistor when the tractor is started the first time. I believe it is from some protective coating burning off the wound wire which forms part of the resistor. One good thing is they are very inexpensive and will likely be one of the lower cost items you will have to purchase for your restoration. Have fun and enjoy the project, Hal.
 
(quoted from post at 17:35:42 01/02/14) You may know or not, But it has been bypassed for some reason.
Click to expand...

Agreed.

That resistor is not even being used!

One wire should be connected at each end. In the picture, both wires are connected to the same end, effectively bypassing the resistor.

Is the tractor 6V or 12V?
 
(quoted from post at 08:47:14 01/03/14) It's 12v. Is it wired wrong?
Click to expand...
Who knows? I usually avoid commenting on 12-volt conversion problems because you never know what creative approach somebody did.

I noticed the 2 red wires on the same end of the resistor and initially thought the same as rusted nuts. But I then noticed there is also a black wire on the other end of the resistor. What, if anything, the resistor is doing depends on what the other end of each wire is connected to.

The red wire matches the added wire from the resistor to the coil. Therefore I assume it was added as part of the conversion and goes to the obvious place. If the greasy black wire goes to the ignition switch, the resistor is wired properly to drop voltage to the coil. To know if it is wired wrong, the first thing you should do is find the other end of the red wire. The prior responses assume it goes to the ignition switch.
 
Thanks! I'll check it out. The wires were
replaced about a year ago and it's wired like it
"originally" was after the 12v conversion. So
it's been running without any problems but I'll
double check everything.

Thanks again!
 
Jim, you make a very valid point in 6 to 12 volt conversions and why I like original wiring on my tractors except in very isolated extreme cases.
My brother-in-law has a 1948 Farmall M which has been converted to 12 volts several times by at least 3 different folks to correct something that happened through the multi-conversions with a different twist to how it should be done. There are so many various components like switches, resistors, keys, and the like I won't even get near the thing for fear something will happen while driving it. Just to start or shut it off requires in my opinion a check list for the various steps to hop through to obtain the desired result.
By the way Happy New Year and hope to see you in Huron in June, Hal.
 
(quoted from post at 06:38:27 01/03/14)
(quoted from post at 17:35:42 01/02/14) You may know or not, But it has been bypassed for some reason.
Click to expand...

Agreed.

That resistor is not even being used!

quote]

It's possible that the coil has been replaced with a 12 volt coil. If so, the resistor would not be needed...
Click to expand...
 
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