3PH top link... which mounting hole

[Bob Gibson]

As a reference point, here's the image in my owner manual...

View attachment 4036227

From what I can see, your tractor does not sense with the top link for "position control" or "draft control", so the three holes are simply used for controlling the desired position of the implement when it is lifted and that position is also dependent on the dimensions of the A-frame connections on your implement, for example if you have a relatively heavy and long implement such as an offset disk, you may want the rear of the implement to raise more than the front so that it does not drag when being carried while transporting or turning, on the other hand, if you are using a tank sprayer, you may want the front and rear to lift at the same rate to keep from spilling a full sprayer or to keep the nozzles in correct relation to the plants being sprayed whether they are tall or short plants. Tractors that have position control/draft control have a spring loaded mechanism between that 3-hole structure and the rock shaft that senses torque on the implement and it is connected to the rock shaft valve so that it maintains either a constant position of the implement regardless of the draft or torque on the implement, or it can allow movement of the implement up or down to maintain constant draft on the tractor.

 

[Bob Gibson]

Last two posts are interesting. @RayIN's manual says to "go lower" as load increases, and @wirlybird's says to "go higher" as load increases.

@RayIN what kind of tractor you have?

@wirlybird On your photo of the manual page, it looks like the mounting holes move forward as they move up. Is that correct? Mine all line up vertically.

Thanks for the all the responses.

That all is related to the engineering of the draft system if you have "sensing" through the top link.

 

[Bob Gibson]

Mahindra 60 series

This tractor senses draft through the top link.

 

[Ira]

Correct that my tractor doesn't have draft control. The Kioti CX2510 is a small compact cab tractor (24.5hp), just one step up from a sub-compact. It's a new tractor. I took delivery last week, so I'm still trying to get familiar with it.

I started looking at all of this because when fully raised with a QH and flail mower attached and the top link in the bottom hole, the QH hit the rear position control lever and taillights, and the top link hit the SMV mounting plate on the back of the tractor. When I moved the top link to the top hole, I had about an inch of clearance everywhere (not as much as I would like, but good enough for now). I didn't try the middle hole.

With the top link in the top hole and adjusted accordingly, the bottom leading edge of the flail mower is about 25" above the ground, which I think is high enough.

With the same QH and flail mower on my JD 4110 (a little smaller than the CX2510, and only one top link hole), it had quite a bit more clearance.

Thanks for all the replies.