Backhoe frame mount for Jinma 254

[mitchash]

Could someone post some pictures and specs of the frame mount backhoe for a Jinma 254? I have a CAD Digger that I want to adapt to my tractor. Also should I use the tractor hydraulics or get a PTO pump? I just put on a Coldwater loader that has the two front mounts for the Jinma backhoe frame.

 

[RonMar]

Could someone post some pictures and specs of the frame mount backhoe for a Jinma 254? I have a CAD Digger that I want to adapt to my tractor. Also should I use the tractor hydraulics or get a PTO pump? I just put on a Coldwater loader that has the two front mounts for the Jinma backhoe frame.

The BH mount is basically 2 rectangular box tube rails that fit into those forward mount plates on the BH subframe and are held with a pair of pins. Those forward plates are orientated so the box tubes run back and are just outside the base of the lower 3PH arm mount pins. Wide enough to allow two 1/2" triangular plates to hang from the pins and be just inside the two parallel box tubes.

The rear of the mount box tubes hang off of those pins using two triangular plates that are held to the box tubes with 2 cross bolts each. To mount the BH, I remove the lower 3PH arms and hang the plates from the pins. Then I back in the tractor keeping the triangular plates between the box tubes. I am also trying to get the front of the tubes into or under the forward brackets. At that point I hook up the hydraulics and manipulate the controls to line up the forward pin holes, then the triangular plate bolt holes with the holes thru the box tubes. This with the BH balanced between the outrigger legs and bucket. The box tubes extend back past the triangular mount plates about 2 feet and form a "porch" that the BH sets on and is bolted to. I added an additional mount from up on the BH frame that mates with the toplink pin bracket. This realy solidifies the BH mount to the tractor...

As for hydraulics, That depends on how your tractor is configured and how large the BH is. The pump on the tractor is big enough to run a small BH. Are there any quick connects on the back of your tractor? What valve did your loader come with. If it is the Prince 5200 like what came with mine, you can fairly easilly add a power-beyond sleeve to the valve and plumb the BH off the loader valve. The only real drawback is the small system volume. For light duty use, it would work, but for heavier use, a PTO pump and a larger external reservoir would probably be the better way to go as it will deal with the heat of use better...

 

[mitchash]

Can you send me some pictures of your backhoe set up? What backhoe do you have? Yes I have the hydraulic quick connects at the rear of my tractor. I'm not sure what brand valve I have on my Coldwater loader but it's a joy stick style (works smooth . I already have an oil tank for the backhoe that I can use. I also have a pump that would be run by a small engine if I finished building the trailer style CAD backhoe. Thanks again.

 

[Smalljobs]

I've posted pictures of my own frame on TBN recently so if you do a search you will find helpful info.

 

[Smalljobs]

Ronmar...thanks for your thorough and valuable input. It's always worthwhile.

 

[RonMar]

It is the most basic hoe the chinese offer I think, model HW-03. Pretty solid steel structure and the most basic of control valves. The boom pivots were not well designed, so I made some changes there as well as a few other things Here is a pic of the front with me removing a pin that holds the BH frame rail to the loader subframe.

Here is a not-so-great pic of the back before I modified it(and my grandson leaning in to look at a spider). At the bottom you can just see the triangular plates that hang from the lower 3PH pins on the bottom rear of the tractor case. The BH is off right now so I can get a better pic this afternoon.

 

[mitchash]

Ron, thanks for the pictures and info! They have been very helpful! Does the backhoe seem pretty stable with that frame mount? How well does it dig?

 

[RonMar]

With the toplink attach point, it is a solid part of the tractor. that single change probably makes the biggest difference to how the assembly fits onto the tractor. The added pivot plates and longer pins I added to the boom pivot make it a smooth tight package.

How does it dig? Like it is trying to get back to china

 

[mitchash]

The pictures and help I have been getting were great! I have been looking at dealers backhoes and getting a few ideas there too. I like to mount the backhoe frame to the loader frame, rear bottom PTO mounts and the third link, that should make it ridged enough.

 

[n9911c]

Hi Ron,
Do you have some pics of your mod connecting the subframe to the FEL frame? I need to build that as I am waiting for my new bell housing that cracked in two.
Thanks,
Tony

 

[RonMar]

Tony
Here is a pic. The bar running off to the right is the BH subframe. The big plate running up, is the plate bolted to the side of the tractor bell housing. There is an inner plate welded to it that runs down on the inside of the BH frame bar, the pin I am touching runs thru both these plates and the BH subframe. The bar running from the lower left up at an angle parallel to my arm is the FEL subframe. The vertical towers that support the FEL arms are at the ends of the FEL subframe.

Ron

 

[n9911c]

Thanks for the pic Ron. I saw this one before I emailed you and was wondering where you bolted it to the FEL frame. Did you use the four bolts that go into the engine block that form a square pattern? What is the tube to the left of your arm in the pic?
Thanks again,
Tony

 

[RonMar]

The 4 holes are not on the engine block, they are on the transmission bell housing. That is where the access covers are located for adjusting the clutch on a tractor without a FEL. The tube to the left of my arme extends out from the tractor and has a vertical tube running up to the FEL arm pivot. If you look close at my Avitar, you can see the vertical that sets on that tube by my arm, just behind the front tire...

 

[n9911c]

Ok, I see where i got confused. Your loader setup is different than my ZL-20. My loader sets on top of the trans bell housing access cover brackets(rear support of my FEL) instead of setting on the tube to the left of your arm in the pic. I need to connect the trans bell housing brackets to my FEL or the engine frame to take the stress off of the flywheel bell housing so it doesn't crack in two again. I don't have the brackets welded to my access covers like you do, so I will copy the design on yours and connect to the engine frame. Looking at your pic I see flat bar going up under your oil filter(can't see where that is connected) and there is a square 4 bolt pattern on the engine frame(front support of my FEL) in front of the oil filter that I will have to bracket to.
Thanks for the help,
Tony

 

[RonMar]

Here is a better pic of the loader subframe. where you can see all the attachment points. That angled strut runs from the middle of the crossbar up at an angle and attaches to the frame that runs alongside(and is bolted to) the engine block.



There is another strut that attaches to the top of the FEL towers and runs down and forward to the forward frame down in front of the engine. You can see it best in this pic.

 

[Desert Bred]

Hi Ron. Is that a Coldwater FEL by chance?

 

[RonMar]

Yes it is a coldwater FEL.