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Farmall Tractors Discussion Board |
Re: Dual Range Gears
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Posted by john d. on April 27, 1999 at 18:46:21:
In Reply to: Dual Range Gears posted by Bill on April 27, 1999 at 18:00:56:
Neither was a factory option. The power steering is likely a Behlen unit. Char-Lyn made them too, but the Behlens were especially popular. Another possibility is that someone has installed a unit off an IH 400 or 450 model, which were essentially the same tractor with a few improvements. The transmission gizmo is likely an M&W unit, though I believe Heisler may have made them also. The ones I've seen were referred to as a "9-Speed" unit, because they doubled the speed of gears 1-4 but not 5. The factory gears were therefore the low range, the add-on unit provided the high range. No, this is NOT a "Torque Amplifier" unit. Those involved a separate lever on the left side of the tractor to move the transmission into and out of a lower range without stopping. Torque Amplifier WAS available on some of the late model Super M tractors, which were labeled SMTA. Don't be surprised if you find some other things on the old beast that aren't "factory" stuff. From the 40's through the early 60's there was a tremendous amount of aftermarket stuff that was put on the H and M lines of Farmall tractors to improve power, versatility, and convenience.
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