John deere H over pulley

msteinblock · Jul 9, 2016

I managed snag one of these hard to come by over pulleys. This one is the later one. What is the difference between them? Could i get it to work on my 39?

dan_41jdh · Jul 9, 2016

You're right - those are rare. Would you please send me a PM?

MARV2015 · Jul 10, 2016

OK _I'll ask the dumb question - since I own an "H" --WHAT is an over-pulley?????

Pictures if you have one!

dan_41jdh · Jul 10, 2016

Marv, an overpulley was an accessory that was essentially an iron sleeve or collar that fitted snugly over the belt pulley of a model "H". The "H" belt pulley was on the camshaft so it rotated at half engine speed and as a result belt speed was too slow for the 10-A hammermill that was sized for the "H". An overpulley increased the belt speed sufficiently to run that hammermill.

dan_41jdh · Jul 10, 2016

Here's a shot of one mounted to a tractor. There are recessed setscrews around the perimeter that clamp it to the belt pulley. The overpulley increased the belt speed from a rated 2245 feet per minute to 3000 feet per minute.

MARV2015 · Jul 10, 2016

OOOOO KKK!!!! I see -now! I have never seen such a thing so now i can keep my eyes open in case I run across one. I would imagine the speed increase came with a little drop in applied torque so the RPM's would have to be set a little higher to compensate. About the difference on the rear axle of a car running 14 inch rims compared to 15 inch rims.

John deere H over pulley

msteinblock

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