But rather the top link is under compression when ground-engaging attachment is used, such as a plow, not tension. just sayin... The pulling is done by the lower arms.
It does, but how does that logic apply to tractors not equipped with draft sensing mechanisms? I have such a tractor and the owners manual calls out one of the holes to be used with a moldboard plow (don't remember which one) and whatever your preference is for the others.
No. I said lift LINKS.
So if you've got draft control that pin location would change the sensitivity as mentioned.. but another use or function of it, is it changes how the implement angles as you lift or lower it. If your top link is parallel to your lift arms, then the implement will stay at the same 'pitch' or fore/aft tilt as you raise the 3pt. If you lower the tractor end of the top link and it is no longer parallel to the lift arms, the implement will tilt/pitch forward as you raise it. This is really handy in certain cases of needing more clearance. For example, if you use the bottom hole for the top link with something like a bush hog, at max lift height the tailwheel will be MUCH higher up which could be useful for traversing creekbeds or driving it up on a trailer, etc. Would increase height on the end of a boom pole dramatically as well. But, if it's a ground engaging implement it would change your 'angle of attack' and the implement might be really sensitive to that as far as how it works. If it's a pto-driven implement it would put your u-joints out of parallel / 'out of plane' which would make them unhappy and introduce more vibration and wear than if they remained parallel.
Well, I can only go by pics because I've never dealt with any extendable ones in person, so for all i know they're all like yours!! But I thought I had seen some where the tractor half of the lower arm was boxed and other end slid into it and you locked it in position with a pin through the assembly. Maybe I imagined that.
I’m pretty sure you’re thinking about the Lift Link (leveling assembly) style like those found on several of Deeres CUT’s (compact utility tractors). Those have the Turnbuckle and Yoke portion Lift Link fitting inside each other, which is then covered by the handle (square tube with solid round stock welded on each side to make the handles - it’s supposed to help things turn easier when making leveling adjustments, while keeping some of the threads clean from dust and dirt when the handle is returned to its “storage position” resting on top of the pin).Well, I can only go by pics because I've never dealt with any extendable ones in person, so for all i know they're all like yours!! But I thought I had seen some where the tractor half of the lower arm was boxed and other end slid into it and you locked it in position with a pin through the assembly. Maybe I imagined that.
Where did you find that top link?
