3-point hitch anti sway modification

[quicksandfarmer]

I have a 2007 Jinma 354, and the anti-sway links on the 3-point hitch have a problem. Where the links attach to the tractor does not line up with where the lift arms attach to the tractor. The links attach below and aft of where the lift arms attach.

What this means is that when the hitch is lifted, the anti-sway links tighten, because the arc that they travel is not the same as the lift arms. If they are tight in a low position a shackle on one side will snap when the hitch is lifted all the way. It took me several snapped shackles to figure this out.

The only way to prevent snapping the shackles is to have the links slightly loose when the hitch is down. This defeats the purpose of the links. I find that particularly when using the mower and box blade I need to have the links tight in the down position to get good results. However, with the links tight I can't lift the implement without risking the links. I also believe it interferes with the normal tendency of a 3-point hitch to float when the implement runs over an obstacle.

So I'm thinking of changing the attachment method. Ideally I would line up the links with the lift arms, but the shape of the rear axle won't allow that. Second choice is to put the link attachment higher than the lift arm attachment point. This will reverse the problem -- the link arms will loosen when the hitch is lifted. I think I can do this simply, by running a chain from the existing attachment point around the front of the rear axle and attaching the link to the chain where it comes over the top of the axle.

Does anyone have any thoughts on this? Has anyone done anything similar? I'm particularly interested in thoughts about how the geometry will be affected by having the links loosen when the implement is lifted.

Thanks.

 

[Hooked_on_HP]

On my ford 1900 they have a ubolt that goes over the axle housing to hold a L shaped plate on the bottom of the axle. This plate has a hole for the chains that lines up with the lower pin on the TPH. Could you do somthing like this on your Mits.
Bill

 

[JB4310]

My Ford 1700 does the same thing, if I have it snug at the lower setting on the 3pt then it gets very tight when lifted, at some point there is the tightest point then loosens again, I've not broken anything yet, I have threaded rods and turnbuckles to adjust.
I just thought that's the way it is and there's nothing that could be done, but now I'm thinking that I might be able to move those brackets on the axles just a little to get the geometry just right.
I plow with mine in reverse sometimes and want it to be as tight as possible.

 

[Hooked_on_HP]

JB, Mine are on the bottom as in you second pic. Where are yours mounted. The ROPS goes into the holes in the housing you are using in the first pic.
Bill

 

[JB4310]

No ROPS on this machine, I tried it in the upper position which extends the arms, you also have to rotate those brackets on the axles, I needed it like that to make a pto generator shaft compatible with this machine as well as another.
I've since gotten a QH so I reinstalled them on the bottom since the QH extends the connection length.

This thread got me thinking with a little tweaking to those axle brackets position, I may be able to get it snug through the whole travel path.