Backhoe BH77 broke - defective part?

[boggen]

could be multi things. regardless for now need new pin.

pull the 2 cylinders apart. and double check inside diameter of each cylinder. by just putting the pin in. and see if it wiggles around some. if it wiggles to much. you might have found the problem.

beyond that, the frame would need to flex.

to me there seems like a good amount of spacing, and looks like washers are missing between cylinders and frame mount. but not a mechanic by no means. 555c TLB i have, everything fits fairly tight, exception of wear and tear of holes in the frame and pin wear.

 

[nspec]

I haven't seen a new one, but it sure looks to me like the frame is bent. Looks like it is tweaked out on both sides. Seems to me that it all should fit up pretty close with nowhere near that much space. Looks like the frame needs some strengthening in that area.

I would absolutely insist on a new unit. Keep working your way up the corporate ladder until you get results. Your dealer should be working on your behalf. That sort of damage to me is absolutely inexcuseable. It would certainly seem to me that it would be in Kubota's interest to remedy this situation. If not, I would think you could fight it in court and win pretty easily.

 

[Berniep]

Move the cylinders out of the way and the new pin should fairly easily slide in.
If they are bent at all the holes wont be pointing at each other.

 

[Texas Fella]

I did not read through all of these, so sorry if I am repeating what some one else said. It is very unlikely that this is a case of bad pins. Some one said something to the effect that if 2 of them did it, then it must be an issue. Kubota makes 10s of thousands of backhoes, 2 (or even 20) is not an epidemic. Ususally, what causes pins like that to break is that they sit on the dealers lot and the pin gets seized in the bushings. When the back hoe is used, the pin does not rotate fully and thus snaps off. If you already have one, keep it greased. Every time I post on here someone argues with me and all but tells me I am stupid, however, I really do happen to have a little knowledge in the this field and this is usually how these pins break, not to say that it always happens that way. Hope this helps.

 

[broken kubota]

TwinCam88 this is not pointed at you:
I have to throw the BS card on the link posted to the broken bh77.
Look at the wear on the bucket. There is no way you can wear the paint off a Kubota bucket in 3 hours of use.
Then look at picture of the 3200 in his heated garage. That picture is PhotoShopped:ashamed:.

Hi all,
Just reading around to see if anyone else had the Bad Bh77 problem and I see the anwser is yes:laughing:. Well the pictures are not photo shopped or fake in any way. Kubota is aware that they have a problem.
I got my boom replaced and both cylinders also replaced along with my pin and gess what The pin broke a second time after about 1 hour into digging out a very small and rotted stump. Just like the Bh 77 that broke in this topic,very light digging had not even got to the point of wiggling the stump. My damage is not as severe because when the pin snapped it made a metalic pop sound and at that point I stopped digging and inspected the pin and discovered the fracture. At this point I am still waiting for kubota to contact me with a answer to the question of: What are you going to do? I dont really want a backhoe I have to dig in sand with:laughing:WTF Kubota.
ps. the spreading and or twisting of the ears on the backhoe is from pulling back the boom with half a pin in the boom(half that is bolted stays in other half falls out ) this makes the ears spread or twist depending on bucket load.

 

[Texas Fella]

It really suprises me how many people spend that much money on a BH to just "dig in sand."

 

[wdchyd]

I did not read through all of these, so sorry if I am repeating what some one else said. It is very unlikely that this is a case of bad pins. Some one said something to the effect that if 2 of them did it, then it must be an issue. Kubota makes 10s of thousands of backhoes, 2 (or even 20) is not an epidemic. Ususally, what causes pins like that to break is that they sit on the dealers lot and the pin gets seized in the bushings. When the back hoe is used, the pin does not rotate fully and thus snaps off. If you already have one, keep it greased. Every time I post on here someone argues with me and all but tells me I am stupid, however, I really do happen to have a little knowledge in the this field and this is usually how these pins break, not to say that it always happens that way. Hope this helps.

If you " do happen to have a little knowledge in the this field" then you'd know that steel has two strengths....Yield (bending) and Tensile (snapping)....

Steel is has it's limitations and to exceed these limits will provide anybody with failure in a given situation.....

To say that these units have "Rusted in place" and snapped because of it is completely false.....(IMHO)......These are NEW backhoes....

A snapped pin (exceeding the tensile strength) will bend ears and pin bosses everytime.....Yes it can start with a broken pin.....maybe the pin bends first (yield strength), I don't know....

My reply to you is not in an argument fashion and I'm not implying that you or anyone else is stupid, just stating the facts as I see them.....If I'm wrong please tell me so.....

 

[wdchyd]

Hi all,
Just reading around to see if anyone else had the Bad Bh77 problem and I see the anwser is yes:laughing:. Well the pictures are not photo shopped or fake in any way. Kubota is aware that they have a problem.
I got my boom replaced and both cylinders also replaced along with my pin and gess what The pin broke a second time after about 1 hour into digging out a very small and rotted stump. Just like the Bh 77 that broke in this topic,very light digging had not even got to the point of wiggling the stump. My damage is not as severe because when the pin snapped it made a metalic pop sound and at that point I stopped digging and inspected the pin and discovered the fracture. At this point I am still waiting for kubota to contact me with a answer to the question of: What are you going to do? I dont really want a backhoe I have to dig in sand with:laughing:WTF Kubota.
ps. the spreading and or twisting of the ears on the backhoe is from pulling back the boom with half a pin in the boom(half that is bolted stays in other half falls out ) this makes the ears spread or twist depending on bucket load.

Welcome to TBN...:welcome:......Sorry to meet this way but we always enjoy anything to add...

 

[wdchyd]

Ahhhh, you're the guy from post #4.....:thumbsup:

 

[dodge man]

I don't know anything about backhoes, but if a pin had a little grease on it from the factory, I'd think it would have to sit around for years before it would rust enough to freeze the pin and cause it to fail during its first use.