I just had a sending unit go out in one of mine. The OEM price was $130 + shipping and handling + wait for it. ebay had a unit for $21 free shipping in 3 days.
I found that there are several types of units out there: One is 0-90 ohms and the other resistance reading that's popular is 33-256 (or thereabouts). Then there is there is full at miniumum or maximum resistance differences.
The tractor was made in S. Korea and the device I bought was made for a '65ish domestic Chevy and I liked that idea as I expected and got one that had a very heavy duty resistance scale and wiper arm contact....ought to last the life of the tractor.
The tractor required F at 0 ohms and E at 90-100.
The unit was made for F at max resistance so I just turned the resistive sending unit upside down...easily done with the two mounting screws....
The arm on the unit was adjustable from 6-24 inches. Cut to fit....my tank is 12".
Noticed that the Mounting hole for the replacement was SAE 5 patern/dimension and the OEM was something else in metrics, same patern but slightly larger diameter mounting hole pattern . Swapping flanges solved that problem.
The dimensions for SAE 5 tank floats are published online, just ask www and you can measure yours to see if it fits since yours doesn't lend itself to what I did to fit the mounting points.
Actually enjoyed the experience. Better spent $21 than had I decided to go to a movie.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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