My TO35 Delux 1959 has 12.4 X 28 rear tires on the turn out wheels. I read the Nebraska test info and the rear tires on the tractor for the tests was 11X 28's and 10 X 28's.
This is where I need some input from the guru's. Are the 12's helping or hindering? I do know that the gearing is set up for the original tire size, and that a larger tire can make the maxium torque and horsepower come in at a different rpm, or possibly different gear . Being very new to tractors the two speed trans is a new thing to me.I have read the section in the operator manual, about using the correct gear for the job (plowing , ground engagement equipment etc.) My tractor was purchased with the TRACTORMETER missing and the generator has been converted to a Delco alternator. Would a standard tachometer, help out in selecting the correct gear and rpm? :D many thanks for any input
Re: BIG WHEELS KEEP ON TURNING in reply to dagger dog, 08-28-2009 17:04:01
I think I have the maths correct........ :?: An 11 x 28 tire has a no load diameter of 50 inches and a rolling circumference of 13.82 feet. An 12.4 x 28 tire has a no load diameter of 52.8 inches and a rolling circumference of 13.09 feet. Therefore a 12.4 x 28 tire has a 5.6% longer rolling circumference than an 11 x 28 tire.
I'm not sure of the correct tire size on a TO35, but I seriously doubt 5.6% difference in rolling circumference would be noticeable or seriously affect tractor working performance. Theoretically, the tractor should have a 5% faster top speed! :lol: If you don't want to convert back to a generator and the original Tractormeter, there are any number of low cost electronic tachos available that you could install.
Or you could do what the rest of us do - open up to three quarter throttgle and get on with the job.
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