Kubota BT602 backhoe on YM155d

[bassy7]

I recently picked up a Kubota BT602 backhoe, it is like new, and was barely used by the PO.

I need to figure out how to mount and plumb it onto my 1977 YM155d, and decide if it is worth the effort and expense.

I've found a source for a used set of bt602 brackets (its a 4 point type of frame mount) and hope to get those within the next 1-2 weeks. Once those are on hand, I'll see what I can do to tie those into the existing loader subframe. The loader subframe is bolted onto the rear axle housing, so it seems logical to try to tie in in there for the most strength. I think I'll have to remove the 3 point arms for this Backhoe to fit.

The pump on the little Yanmar is very slow, maybe ~3gpm or so, and the backhoe wants about 6-7gpm to operate properly. I think the use of ~7gpm PTO rear mounted pump will be best.
Besides the mounting bracket debacle, Here is a big hangup I'm having..... the BT602 has 3 quick release hoses that hookup on the BX25 (where it came from). Yet, PTO pumps have just 2 ports. I'm very unsure of the proper way to pipe this thing in.... I also suppose I'll need to mount an auxiliary hydraulic fluid tank.

Another obstacle... I'll need to add a swivel mount to my Yanmar seat, it appears the current bracket under the seat is a hinged stainless steel setup that the previous owner fabricated. I think a van or bass boat swivel seat might work in the application.


Any suggestions for making this setup happen?

 

[fried1765]

I recently picked up a Kubota BT602 backhoe, it is like new, and was barely used by the PO.

I need to figure out how to mount and plumb it onto my 1977 YM155d, and decide if it is worth the effort and expense.

I've found a source for a used set of bt602 brackets (its a 4 point type of frame mount) and hope to get those within the next 1-2 weeks. Once those are on hand, I'll see what I can do to tie those into the existing loader subframe. The loader subframe is bolted onto the rear axle housing, so it seems logical to try to tie in in there for the most strength. I think I'll have to remove the 3 point arms for this Backhoe to fit.

The pump on the little Yanmar is very slow, maybe ~3gpm or so, and the backhoe wants about 6-7gpm to operate properly. I think the use of ~7gpm PTO rear mounted pump will be best.
Besides the mounting bracket debacle, Here is a big hangup I'm having..... the BT602 has 3 quick release hoses that hookup on the BX25 (where it came from). Yet, PTO pumps have just 2 ports. I'm very unsure of the proper way to pipe this thing in.... I also suppose I'll need to mount an auxiliary hydraulic fluid tank.

Another obstacle... I'll need to add a swivel mount to my Yanmar seat, it appears the current bracket under the seat is a hinged stainless steel setup that the previous owner fabricated. I think a van or bass boat swivel seat might work in the application.


Any suggestions for making this setup happen?

"Any suggestions for making this setup happen"?
Yup!!
Sell your Yanmar YM155D, and buy the appropriate Kubota tractor for your Kubota BH

 

[bassy7]

"Any suggestions for making this setup happen"?
Yup!!
Sell your Yanmar YM155D, and buy the appropriate Kubota tractor for your Kubota BH

Not gonna happen at all! No way could I justify the cost of one of those. They only reason I got this BH, is because of the deal I found, and its excellent condition. Also, I really don't NEED one, but do have some projects it could help with.

I can weld, and cut metal no problem. So fabbing up the brackets to work will mostly be a matter of tinkering time. As for the hydraulics, I've replaced all the lines on my YM155d, but that was a simple swap and replace. Just need to know how to hook these 3 backhoe lines up.

After I get more detail info on how to make this happen.... then my options are.
1. Do it
2. just sell the backhoe and move one
3. install the backhoe on a frame with wheels, motor and pump- a portable/towable backhoe.

 

[fried1765]

Not gonna happen at all! No way could I justify the cost of one of those. They only reason I got this BH, is because of the deal I found, and its excellent condition. Also, I really don't NEED one, but do have some projects it could help with.

I can weld, and cut metal no problem. So fabbing up the brackets to work will mostly be a matter of tinkering time. As for the hydraulics, I've replaced all the lines on my YM155d, but that was a simple swap and replace. Just need to know how to hook these 3 backhoe lines up.

After I get more detail info on how to make this happen.... then my options are.
1. Do it
2. just sell the backhoe and move one
3. install the backhoe on a frame with wheels, motor and pump- a portable/towable backhoe.

"just sell the backhoe and move on"...... seems like the best option.

 

[oldnslo]

The three hoses are
Pressure into the back hoe valve
Tank which goes directly to the reservoir
Third line suspect power beyond but not 100% positive. This would also be connected to tank


First I would suggest trying to use the pump on your tractor to see if operates at a sufficient speed. For limited use you might be ok

 

[James Eric]

https://www.tractorbynet.com/forums/iseki/400707-kubota-bt600-bolens-h1502.html?referrerid=85572

I did it on my Bolens H1502 with 3gpm. It’s not fast but it works great. I will try and post pictures later.

 

[James Eric]

I checked my machine. I have the BT600 which only has 2 hoses. In the year since I installed it I have pulled 2 dozen stumps, planted (16) tress, widened a 100 feet run-off ditch and the list goes on. I would use the tractor hydraulics before spending money on a PTO pump. Unless you really need the speed you may find that is all you need. My tractor has 3gpm, 13.7 quart hydraulic tank, and 1850psi. I considered a swivel seat but I already had the metal and I couldn't wait to take it out and play in the dirt. I picked up the seat for $10 at a local repair shop and I removed when I remove the backhoe by pulling the 2 pins.



Good luck with your project.

James

 

[bassy7]

I checked my machine. I have the BT600 which only has 2 hoses. In the year since I installed it I have pulled 2 dozen stumps, planted (16) tress, widened a 100 feet run-off ditch and the list goes on. I would use the tractor hydraulics before spending money on a PTO pump. Unless you really need the speed you may find that is all you need. My tractor has 3gpm, 13.7 quart hydraulic tank, and 1850psi. I considered a swivel seat but I already had the metal and I couldn't wait to take it out and play in the dirt. I picked up the seat for $10 at a local repair shop and I removed when I remove the backhoe by pulling the 2 pins.

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Good luck with your project.

James

Thank you for taking the time to respond. Looks like a nice setup to me. While very functional, awesome and tough for its size, the loader on my Yanmar is SUPER slow, one motion at a time or its turns into a sloth. I imagine that using 2 motions at a time with a backhoe is essential to smooth operation. Also, while I haven't really looked into it yet...I am a bit concerned about the compatibility of the hydraulic fluid compatability, as my Yanmar hydraulic system ties in with the transmission and uses the same fluid. It is a geared transmission though, not a hydro trans.

As for adding a separate seat, I had already begun to lean in that direction, assuming I have space for it.

 

[Everhard]

I agree with trying your tractor hydraulics first. Much much simpler as has been mentioned. If you've a rear remote then the high pressure lines can go there to/from the backhoe and you'll need to figure out where to connect the low pressure tank return line. if you're set on the pto option then you also need to consider where you're going to put a large hydraulic oil reservoir... (And that's indecently where your third line would go to - you were wondering what to do with it given the pto only has 2 connections.)
I'm all for adapting a backhoe to a tractor - did it with mine. (kioti ck20 tractor mated to a NH backhoe) Just because you can put a 7gpm pump onto your pto doesn't mean your motor is going to have the power to give you a full 7gpm under load. So again it points back to being simpler just hooking to the tractor hydraulics. You'll be surprised at how well that will work.
Look at how your tractor is designed to have a backhoe frame attached, and try to do something similar - at least as far as the mounting points. Those are the strongest points as calculated by the manufacturer. Then adapt the frame to connect to those points. Look at other manufacturers for ideas on how to make the backhoe frame slip on/off the tractor. I can certainly say the Kioti way is a breeze - I created the mount points which are permanently bolted on my tractor (and in no way interfere with anything when the backhoe isn't on) and can connect/disconnect the backhoe in a matter of minutes.
Lastly be honest with yourself - if it looks like it's going to be way too much of a hassle to make work consider that if you got that backhoe for such a great deal then selling it would mean you're going to make a profit - so sell it, and buy a more compatible backhoe instead? I wanted a backhoe for my tractor for ages, but I waited. Could have bought a number of different ones. Typically a frame mount for my tractor was probably closer to $6000Cad and that's at the lower end of the pricing. I found the NH backhoe for $3000Cad, plus $100 worth of steel and some of my time and I was away to the races. I've done a ton of work with mine, I know it's limitations, it's certainly not fast but it's a great tool for what it can do.

Hope those thoughts help..
E.

 

[bassy7]

Everhard-

Thanks for your input.

I've lucked out and found some used brackets designed for this exact backhoe, hopefully I'll have them by the end of the week. Once I have them, I'll be able to really start coming up with ideas on how best to attach them to my existing sub-frame (which holds the FEL). The subframe comes all the way to the rear axle where it bolted on.
The YM155d is very small, quite old, and only 15hp. There are only a couple of these with a BH to be found. I have not had any luck seeing how those YM155D backhoes are connected, but if they are all 3 point, that won't help me.

One good thing going for me, is that I live about 2 miles from a Kubota dealer, plus a new Mahindra dealer about 4 miles away. So I can go check out their various setups for brainstorming ideas on bracket attachment.

***I feel like I should tie the backhoe mounting brackets into the subframe, and also to a higher up point above the PTO, does that sound reasonable?



If that seem workable, then I'll dive even deeper into the hydraulics.... research has revealed that although this BH comes from the BX25 which has 7gpm total max flow, but only between 3-4gpm of that makes it to the BH- If I properly understood what I was reading.
So plumbing this into my existing hydraulics might work- and save me the cost of a $300 or more PTO pump. No having to add another reservoir to would be great.

ON the flip side, since I know close to zero about these hydraulic systems, tapping into my current system seems more difficult at this time. Hopefully I'll become more knowledgeable and it won't be such a mystery. My tractor does not have any remote valves to tap into.

**Should I add remote valves for future hydraulic options and tie into those for the BH, or would it just be easier to hook this BH up into the existing network of hoses with some T fittings?