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Oh, and yes the ROPS gets in the way if you use the chair. Next up is extending the OEM ROPS up 12 inches and putting a folding plate system in as well at the 2 ft mark on the existing ROPs.

Sorry for the long delay. I finished the backhoe subframe. It's a woods bh650 to B2400. I ended up using part of a woods subframe for a b7800 I think and then extended it to my existing FEL as it has some brackets already welded on that worked great (see pic). I used 3x1.5 channel in 1/4 for...

I agree dfkrug, thanks for replying. So the weight of the hoe will be on the lower 3 pt arm(s) axel/rod, right next to the steel frame that also holds the ROPs as this is where the subframe in designed to mount. See picture below

B2400 to Woods 650 BH, using BH6500 subframe from woods (modified). OK, I have back half of the woods subframe stuck on the b2400 rear end. As you can see in the photos it is short of FEL bracket by about 26 inches. It actually lines up with the Kubota Subframe cross bracket but I don't want...

I could, I have it. Not sure if it has been repaired or just a bad weld the hoe end. See pictures. My mig can't melt that thick of stuff, but I do have access to a stick. Just thought since I had the steel I could make a better one. But in the end that might not be necessary as much of the...

Update on B2400 sub frame project. I have mounted the OEM sub frame stiffener 4681 on the B2400 (see pic below). I will post a few pics of this as well as the HD toplink later as finding the data on the 4681 OEM kit is getting harder as time goes on. I decided to mount the OEM stiffener first...

Found it I think... It's a woods bh6500 subframe kit number 9267. It appears it might use a bracket instead of the two tabs on my frame. I tied to test fit it on my b2400 and the rear pin fitment is really tight, but will work. The front connection point is not compatible with the B2400...

Anyone see this kind of subframe before? I still can not find out who made it (Woods? Kubota?) and if there are inherent weakness to this design. I can modify it to strengthen this style once I know of any issues it may have. I plan to use it with a reinforced toplink and HD toplink bracket...

Major Update: backhoe secured. I got a great deal on a BH650-2 Woods backhoe. Included pump. And not advertised but installed was a sub frame for I think an old B7100. And to my shocking surprise it fits my B2400! I haven't seen this idea before so I am posting pictures. It is unbolted...

And yet another interesting idea that I don't know I agree with. In this video () their subframe connects to the 3 point arm housing. They remove the 3 point arms and attach a plate to each side (where the arm slides off) that in turn bolts to the subframe. If the 3 point assembly area is...

I just scored the Kubota frame reinforcement kit B4681 for my 2400 - the one that strengthens the frame on each side from the rear axle assembly to the FEL. New old stock in OEM box with all hardware and instructions. Also found the reinforced toplink housing bracket and now have it in the...

Oops - I had that torque backwards. But the end result is the same whether its the front or back that gets let down quickly. I can also see the issue with driving around - good idea to stick to the BT600-603 units as they are very light compared to most (just 630 pounds without bucket I...

Question: when people say that backhoes improperly supported can brake a tractor in half (between rear housing and engine housing), what force is causing that? My assumption is it is a situation where the backhoe is pulling down (digging) and hits a rock/root that stops the bucket so the force...

LouNY, is a T rail two flats welded to make a T? If so I had not thought of that but it would be strong. I've got a 220v Hobart 180 which is good to 5/16... so that's going to be my limitation. Not sure a 5/16 flat stock is going to be strong enough, but assume a 5/16 channel would be. My hoe...

Haha - yeah that question was foo barred. I was asking how thick the channel steel needed to be, which you answered. I'm going to start looking around to see what I can get my hands on (not retail).

How this of channel is needed if I go that route?

OK, now on to construction basics. What thickness of steel should I fabricate the sub frame from? I am looking at two different ways/methods: 1. flat stock like OEM Kubota and Woods uses that runs from FEL to Hoe attachment 2. channel (3x1.5?) under the axle as many have used on their DIY...

I saw a BT603 today at the local dealer and grabbed some numbers. I was surprised that the mount is basically a 16 by 10 inch rectangle (16 wide by 10 high). It's looking like my subframe will come out an inch of so wide on each side based on the axle housing but I can deal with that. It...

It appears that my B2400 hubs slide off of the axle (they are held with a large pin and a squeeze bolt and two wedges) so it appears I could make my subframe with a hole for the axle and thus be solid all the way around. This was my assumption in my first two design ideas in a previous post. I...

Thanks for the reply LouNY. In your last sentence above, are you saying the "axle housing" as in the ends where the axles come out or the back side where the ROPS connects? Just want to be sure I am tracking with you :) Something like this is going through my head...

The way woods attaches their subframe at the end of the axle housing using the 4 pre existing bolt holes APPEARS to also be the way some of the kubota sub frames attached on the L series as best I can tell from the first picture. One key I had not picked up on is that both of them also have...

That's genius! I do remember this now that you posted the pic again - I read the entire post a few weeks ago before posting my first thread. Do you see any harm in doing this to one that is aluminum? Maybe I do both: a wrap around AND put a plate on the end of it that has the holes for the...

Sorry for the delay - work. Ug. The first picture is of the woods sub frame mounted on a B7500 which is about identical to the B2400. As I see it all the weight of the hoe would be on the axel 4 bolts on each side. I guess it's strong enough to hold it... The rest of the pictures show my...

This all makes a lot of logic. Looking back that is surely why Kubota came out with the sub frame rails for both sides... not a true subframe but certainly help in strengthening the frame between the rear housing and the engine (FEL) section of the tractor. I think I will find/install these...

Thanks for the response. It is aluminum. It appears that there are two issues I need to keep in mind in the design. 1. reinforce the frame from the FEL back to the rear end or even hoe, 2. be sure the attachment method of the custom sub frame to the rear axle housing is strong enough. Not...

And here is a the diagram for the previously mentioned woods sub frame for the B2400. Not sure what 37 and 38 are as they might be some sort of extra support that bolts to the axel housing as well? I can understand 37s placement as next to the housing that would stick through the hole, and I...

OK - I'm up next :) How about a sub frame for a B2400? The front connection is easy as the FEL is already there with several attachment options. The rear is where I am stuck noodling. I "think" the woods sub frame 1020800 utilizes four tapped holes on the end of the axel housing on each side...