how to build your own custom backhoe subframe

   / how to build your own custom backhoe subframe #151  
Are you sure your hoe is only 600#? Any side-view pix of it, with something nearby for scale? That is a pretty small Kubota.

I am for close-coupling the hoe to the tractor, for sure. I see you have the rice paddy tires. You can get away with as little as a finger's-width spacing there, but it will require walking on the rear tire to mount the hoe seat.

Here’s a photo of its plate. Originally 315kg. It is only a little one. I haven’t really used it much. So don’t have many photos and now it’s in my garage it’s tricky to photograph for scale. I’m using an extra wide angle lens on these pics so it may skew the scale some.

those are the tyres I got it with. Quite aggressive!
 

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   / how to build your own custom backhoe subframe
  • Thread Starter
#152  
Your wide-angle lens explains why the photo makes it look big.
 
   / how to build your own custom backhoe subframe #153  
Got the tractor side attached. Might beef up some more of the welds.

I ended up adding some extra support to the rear axle mounts. They are still removable if needed. But I suspect I’ll keep them on permanently.

I’ve gone with pins. I’ve shimmed them so they fit tight. Maybe too tight, so they’ll become a pain to remove. Time will tell. I can switch to bolts with welded nuts if it doesn’t work out.

Hopefully going to get the hoe side welded up and get the rungs on the ladder in the next few days.
 

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   / how to build your own custom backhoe subframe #154  
Looks pretty cool. May be a good idea to create your own thread on the build.
 
   / how to build your own custom backhoe subframe
  • Thread Starter
#155  
May be a good idea to create your own thread on the build.
That makes sense. These old Kubs have quite the following. Here is an old Kubota K629 backhoe attachment for old B-series CUTs. With custom subframe and PTO pump. I posted about this hoe before, and it continues to sit, unused, in a friend's backyard.
K629_hoe.jpg

K629_hoe_2.jpg
 
   / how to build your own custom backhoe subframe #156  
I just finished this thread. Thanks dfkrug for all the great info and pictures.
I bought last summer a Yanmar YM2310 with a FEL. Only 2 wheel drive. I have a Case 580CK backhoe so I know what a heavy machine can do. But like a Siren's song I keep looking at backhoes on small tractors. My tractor weighs 1980 lbs without the FEL. So I think that qualifies as a small tractor.
Anyway, your posts are making me think once again about adding a backhoe. The Yanmar has some sort of frame up front as well as the FEL frame. I am thinking that if I can get a sub frame to fit that goes all the way to the front of the tractor and attaches to the existing tractor and FEL frames, and hangs from the rear axles, the tractor should be safe from breaking in half. As long as the sub frame takes all the bending loads it seems to me that the axles would be the only parts on the tractor at risk, because the backhoe frame would be, in essence, hanging from the axles.
I have all the machine tools and welders and saws and plasma cutters needed to fab a frame. I just need to be able to get the frame to fit.
I would need to be able to remove the backhoe fairly quickly because I use the box blade, back blade, and post hole digger too. Oh, and the tiller too.
I have to find a backhoe first. I keep trying to talk myself out of a backhoe and then someone like you posts something like you did.
Thanks,
Eric
 
   / how to build your own custom backhoe subframe #157  
Looks pretty cool. May be a good idea to create your own thread on the build.
Being a novice in this field. I was hoping to piggy back off the experience in this thread!
 
   / how to build your own custom backhoe subframe #158  
That makes sense. These old Kubs have quite the following. Here is an old Kubota K629 backhoe attachment for old B-series CUTs. With custom subframe and PTO pump. I posted about this hoe before, and it continues to sit, unused, in a friend's backyard.
View attachment 737924
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Hmm, I wonder if that's the one that fits on my old B. It would be fun to dig some trenches with the old girl. :)
 
   / how to build your own custom backhoe subframe #159  
I figured I would add to this thread. Just finished subframe for New Holland 915GH to my Kubota L2501. Purchased at auction for $900. No bucket. Using 5”x3/4” flat stock, I mimicked a typical bh77 mounting from front loader mounts to axle and rops mounting. Using a bolt up connection for mounting plate to backhoe. A little tedious on removal/reinstall, but strong and easy to build. Bought bucket from Titan and modified to fit.
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Used a couple of tips from this forum(thank you). Also do not have to remove 3 point hitch components. Total all in about $1600. Could not justify 10k + for bh77.
 
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   / how to build your own custom backhoe subframe
  • Thread Starter
#160  
Just finished subframe for New Holland 915GH to my Kubota L2501. Purchased at auction for $900.


I do not know that hoe. Does it have a toplink connection under the seat? If so, I would connect that to the toplink bracket on the tractor for additional stiffness.

It is a good thing to see how much flex you get while digging. This takes 2 people; one operating the hoe, and the other looking closely at the frame at the rear of the hoe.

Looks good. Killer deal.
 
 
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