The yoke was about 4-5" long, and pivoted directly above the attachment pin. The top implement link attached to a swinging yoke. It had 3 levers on the quadrant IIRC, one for position and the other two to engage and set the draft control. I had a Ferguson T035 that had it, but I never used it so I can't be much more help. Here's a guy who probably knows all about it. Matt, have you searched for info on the "Ferguson System"? There are drawings and cutaway views around of the inner works, a quick search didn't find one large enough to really see details. Later models like a 460 did have such a control but my reading suggests it worked so poorly that it was abandoned by almost 100% of owners at some point.Īnyway.wondered first if anyone had built their own, had one that worked well or had any pics, advice.etc. ![]() It would simply be disabled when not needed.Ī third issue is that the tractor in question.Farmall Super MTA if anyone cares, never even had a 3 point hitch, much less a draft control. The idea about a fluid "signal" for tractive effort seems mildly attractive as I see the possibility for a second spool valve in parallel to the main hand control which would make the constant adjustments without linkages. The other half of the problem is how to apply the signal to the spool valve, while still allowing gross adjustments for "full up" and "full down". The other idea is to use the same die-springs but use a hydraulic cylinder that moves fluid in proportion to displacement. I can see using something like an array of die springs which would generate a mechanical signal via linkage relative to displacement. Half of the problem is "load sensing" or how to generate a mechanical signal proportional to the tractive effort. ![]() I think I understand how it works.the basic goal is to automatically keep the tractive effort constant when doing something like plowing.and really the only way to do that is by changing the "depth of cut" on the plowing implement via raising or lowering the 3-point lift arms. (And yes, I've done some searches on the tractor forums.the system seems to be "black box" from reading the posts and very few understand what's inside the box.plus no photos either.so I thought I'd try here.) Doing some research on the possibility of designing a system for an antique tractor.
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