Backhoe 3pt backhoe to tractor "mis-match"

[MarkV]

Re: 3pt backhoe to tractor \"mis-match\"

You might want to take a look at the mounting point for the upper link on the tractor side also. That looks like a fair size JD so this may not be an issue but on the Kubota B series they have an optional bracket that is stronger for using a backhoe. The backhoe can cause a great deal of stress at that upper mounting point.

MarkV

 

[Henro]

Re: 3pt backhoe to tractor \"mis-match\"

Couple thoughts which may or may not help...

With the 3PT backhoe on my B2910 Kubota, the lower lift arms do not exert any upward force when the backhoe is attached. My tractor has position control, and the position control lever is set to the lowest position. The 3PH arms essentially float at a higher position.

The backhoe seems to hang from the hardened pins used at the top link bracket. Very important that strong, hardened pins are used at the top link attachpoint. Make that VERY IMPORTANT.

I have extendable lower link arms and usually end up extending them so I can hook up the lower arms easily. When it is all hooked up, and I lift the stabilizers, the extendable lower link ends immediately click back in place. This tells me that in the transport mode, the backhoe is pivoting on the pin in the top link bracket, and pushing against the lower arms.

So I wonder if the extension that you have in mind for the lower arms will work for you? Seems to me that for it to work, it needs to be a non-rotating type of hook up. In otherwords, stiff in the direction the lower arms are pointing, so when you have the extension on you could stand on the end and it would stay where it is, and not move towards the ground...

When in use, the lower arms may find themselves mostly in tension for all I know. But I do know during normal use, while the backhoe is on the tractor and being transported as well as used for digging, that the lower arms will at times be in tension and at other times in compression so your design should allow for that.

Hope this helps... /forums/images/graemlins/smile.gif

 

[Kaliburz]

Re: 3pt backhoe to tractor \"mis-match\"

The center link mount won't be an issue. JD used this "style" of tractor for a loooooooonnng time. Starting about mid 1960's with the 1010's all the way with the w/ the 55 series, which ended about the mid to late 1990's. Thirty plus years is a long time....the introduction of the 5000 series (and 5000 ten, 5000 twenty) went to a different top sensing 3pt vs lower arm sensing.

Side note- one of the most "beloved" tractors before the 5000 series came out is the last, the 55 series. The 2355N (N= narrow; 55hp@ pto, 3 cylin turbo is common here) and it's BIG brother, the 2855N (80hp@pto!!!!! 4 cylin turbo) ended the series. The 2855N is a rare beast here. I'd love to get my hands on a 2855N, especially the one w/ the mechanical front wheel drive!!! A 2855N w/ mechanical front wheel drive is a rare beast...... The closest thing to it would be a 2640 w/ 4wheel (and that's even rarer). A used 2855N 4x4 was being sold at a dealers for $25,000 (w/ loader......and get this, it ONLY HAD 550 HOURS!!!!)

A used 2355N 4x4 runs anywhere from $7,000 to $14,000 (the 7K is like what the trade in cost would be, if a dealer lets it out the door for what he gave for it....and it's still in a "needs work" condition).

Enough w/ the historical detour.........

The OEM pin for the center link to conect the tractor looks small, but it can lift a 3 bottom plow.....w/ no problems. That is a hardened, hardened pin.

The 2640 came in two verions, the Orchard/Vineyard (as seen) and a row crop tractor. Heck, its 70hp at the pto..... /forums/images/graemlins/grin.gif and it weights like 5500lbs dry...(doesn't help when with calcium filled 16.9R24 tires)..... /forums/images/graemlins/tongue.gif

I plan to make the adapter/extension rigid. Bacically an extension of the backhoe frame..... I just never thought about the roll guard being in the way.... I guess it would have eventually come up, weither I bought a used or new...... as most 3pt backhoes seem to mount fairly close....