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Farmall & IHC Tractors Discussion Board

Re: field circuit resistance on Farall B


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Posted by ScottyHOMEy on March 31, 2008 at 05:56:45 from (71.241.213.254):

In Reply to: field circuit resistance on Farall B posted by dads b on March 30, 2008 at 20:55:34:

The fuse is a 10A.

How far shot is your field resistor? The one on my BN wasn't working. With it in place, I had no continuity across the hollow rivets that anchor it. I cleaned it up with electrical cleaner and a SOFT brush. (The core of it may look like mica, which would be brittle, but it's actually a flexible, fiber strip.) Looking, poking and testing some more, I got good continuity when checking between the very ends of the winding, but still none when checking with the probes on the terminals, as if the windings weren't connecting well to the rivets. A little more cleaning and a touch of solder at each end, where the winding goes under the rivet and voila, a functioning resistor.

Did I mention the smoke? Despite all the cleaning, the first time that resistor heated up, I thought I was going to smoke everything in the box! It was fine, though. The smoke subsided when I switched to high charge, and came back on L when I switched the resistor into the circuit. Letting it cool in between, I ran it maybe three cycles of five minutes each before it burned off the residual crud. I did pull the face of the panel afterward and used some low pressure air to blow away any dust or ash, and it's been working fine since.


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