Issues with Yanmar Rotary Tiller connecting to JD 750

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Farm7729
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Issues with Yanmar Rotary Tiller connecting to JD 750

Postby Farm7729 » Mon Feb 03, 2020 9:48 am

Looked and looked online and cannot seem to find where anyone has posted regarding connection issues with a yanmar rotary tiller to a JD 750 tractor.

It seems to me that when the lifting arms are attached the tiller, it is too close to the tractor. This leaves approximately 18” to fit a PTO shaft. Is this enough room? I do not have the PTO that came with it. With each universal joint being about 6”, I’m figuring on only having 6” worth of shaft. In my mind that doesn’t seem like enough to have the play in the shaft to lift the tiller up and down or even connect the PTO.

I’ve also shortened my top link as much as it would allow and it’s too long. This doesn’t seem like as big of a deal as I could just get a shorter one.

Any suggestions? I’d rather not have to buy a quick attachment for my lifting arms. Hopefully I’m just missing something obvious.

Thanks!

Aaron
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Re: Issues with Yanmar Rotary Tiller connecting to JD 750

Postby Aaron » Mon Feb 03, 2020 10:56 am

Those tillers typically require a special top link bracket to help the tiller roll towards the tractor instead of lifting straight up. This helps keep the driveshaft from getting in a bind. They also usually have a double joint (CV looking) driveshaft. Your other option is using longer lower arms.

See link below
viewtopic.php?f=1&t=1875&p=9462&hilit=bracket+top#p9462

Farm7729
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Re: Issues with Yanmar Rotary Tiller connecting to JD 750

Postby Farm7729 » Mon Feb 03, 2020 2:10 pm

If I were to weld an extension to the pins say 10" like mentioned in the linked post above would I still need the double joint drive shaft you're referring to?

Aaron
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Re: Issues with Yanmar Rotary Tiller connecting to JD 750

Postby Aaron » Mon Feb 03, 2020 2:32 pm

That would leave you appx 28" shaft according to your first post which does not sound terribly short. I think the PTO shaft on my seeder is about that long and it works fine.

I have not done that personally on a tiller but two of the posters in that original thread indicated that they could use a short standard driveshaft. I would watch the shaft very closely as you raise it to be sure it does not get in too much of an angle.

Interesting video:
https://youtu.be/gmV4qwLfOMY

winston
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Re: Issues with Yanmar Rotary Tiller connecting to JD 750

Postby winston » Mon Feb 03, 2020 6:59 pm

Butting in as usual. I have had a Yanmar 1300 tiller for years. Been using it with a Bobcat CAT235 last 3 or 4 years. It is a little larger than your 750. Attaching pictures showing extensions I added. Pushed it about 4" further back. Works like a charm. You can control pto shaft angle very well with top link adjustment. I do avoid raising the tiller extremely high while turning. Took pictures tonight, don't pay attention to date.
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winston
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Re: Issues with Yanmar Rotary Tiller connecting to JD 750

Postby winston » Mon Feb 03, 2020 7:00 pm

One more. And what it looked like before.
Attachments
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