I was under the impression that tel-a-depth was only a position control system and the draft control was a separate mechanical component of the hitch (controlled by the lever with the clicks on the left side).
By position control I mean the relative position of the lever in its operating range was representative of the cylinder's stroke position. In theory you could put the cylinder to the same position any time without a mechanical cylinder stop, and were able to temporarily bypass the setting with only the movement of the lever instead of getting off the tractor to fiddle with a stop clamp. This is done with a special hydraulic valve in the valve bank and a feedback linkage connected to the rockshaft. The valve and feedback linkage act like a 3 way household switch and 2 kids playing lights on lights off, only with fluid instead of electrons.
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Today's Featured Article - Talk of the Town: Best Tractor? - by Staff. This recent discussion on the Tractor Talk discussion board here at the on-line magazine drew quite a bit of response. We see the question of "Which tractor is best for me?" asked quite often. We thought you might find the responses interesting. As always, the names of the people participating in the discussion have been left out - we did not request their permission to reprint their names in this article. However you can find this discussion in it's entirety in the Tractor Talk archives.
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