Backhoe Cracked Transmission case between bolts attaching backhoe

[kbforester]

This worries me cause my brand new NS 5310 looks to be the same axle baack there..what year and model tractor is yours? Here's hoping the home owners insurance covers it otherwise what's the point of paying insurance on a tractor! Unless it just fire and theft..

Nx4510, 2014

I have an insurance policy specially for the tractor all by itself. But yes, I totally agree, I hope it covers this kind of thing. These policy documents aren't written very well.

 

[kbforester]

I don't think such a break is common.

@kbforester can you describe what happened with any more detail? That's one hell of a break, I've never seen one quite like it.

Sure-
Basically I've always liked the plowing with my box blade rather than the bucket. This time of year I've got lots of large snow banks that have thawed and frozen. I was pushing some fresh snow into an old bank and the sudden stop of the box pushed the force upwards, hard on the top link. Credit to the strength of the top link I guess.... ?

To be clear, the tractor was traveling backwards. That's what I mean by pushing.

 

[tacticalturnip]

Sure-
Basically I've always liked the plowing with my box blade rather than the bucket. This time of year I've got lots of large snow banks that have thawed and frozen. I was pushing some fresh snow into an old bank and the sudden stop of the box pushed the force upwards, hard on the top link. Credit to the strength of the top link I guess.... ?

To be clear, the tractor was traveling backwards. That's what I mean by pushing.

I can't imagine you were going all that quick, but I imagine there was a lot of force.

 

[kbforester]

I can't imagine you were going all that quick, but I imagine there was a lot of force.

A lot slower than a pickup plows snow, but not crawling. I concider it normal speed. .

 

[JimR]

Sure-
Basically I've always liked the plowing with my box blade rather than the bucket. This time of year I've got lots of large snow banks that have thawed and frozen. I was pushing some fresh snow into an old bank and the sudden stop of the box pushed the force upwards, hard on the top link. Credit to the strength of the top link I guess.... ?

To be clear, the tractor was traveling backwards. That's what I mean by pushing.

I recall a warning for using a 3pth backhoe on these tractors which can cause this same failure that you experience. I believe that part is much stronger in the forward motion versus the backward motion. I use a grader blade for clearing the snow in my driveway. I am always cautious about hitting snow bankings with my grader blade. Hopefully that part is not too expensive to replace.

 

[JimR]

I can't imagine you were going all that quick, but I imagine there was a lot of force.

You have to figure the whole weight of the tractor which I believe is 5000 pounds slamming into that part.

 

[tacticalturnip]

You have to figure the whole weight of the tractor which I believe is 5000 pounds slamming into that part.

Ayuh, that'd be a lot of force.

 

[JimR]

Ayuh, that'd be a lot of force.

Yup, that is why I am very careful using my grader blade in the reverse direction.

 

[ROUSTABOUT]

It is possible to break a tractor in half using a backhoe.

I have seen that too.

 

[IndyIan]

Is that available with a box blade?

I think you just have to slow down using a box blade, use low range and its not a momentum tool... If you can't push it from a crawl then getting a "run at it" is going to be tough on something!
That casting break looks a little funny at the top as well, like there was a flaw up there?

 

[JimR]

I think you just have to slow down using a box blade, use low range and its not a momentum tool... If you can't push it from a crawl then getting a "run at it" is going to be tough on something!
That casting break looks a little funny at the top as well, like there was a flaw up there?

There are 3 dark spots on that break that would tell me that they ate old cracks. Then I noticed what appears to be an even larger crack down the right side behind where this piece came off.

 

[kbforester]

There are 3 dark spots on that break that would tell me that they ate old cracks. Then I noticed what appears to be an even larger crack down the right side behind where this piece came off.

The crack on the right is indeed a crack. I'm certain it wasn't there before. At least not prior to the past couple days. I noticed it when the Break happened.

I think the dark spots you are seeing is hydraulic oil?

 

[ArlyA]

I bought a new Kioti NX4510 last fall. In April of this year I began to experience a hydraulic leak in the rear of the tractor. In July, after the leak had become much worse, the leak was traced to a crack in the transmission case between two bolts that attach the backhoe mount to the tractor. This fall, Sept. 7, I experienced another major hydraulic leak coming from the back of the tractor. This time it was traced to a crack between two bolts holding the backhoe mount on the other side of the transmission case. Is anyone else experiencing a similar problem? Solution?

Alas, the local dealer cannot even order parts for a "high cost" warranty claim until he has factory approval via a "HIgh Cost Repair Code" (HCRC). Kioti's Customer Service Administrator (CSA) has told me that is Kioti's policy and that it is not subject to review or discussion. The CSA said that if anyone proceeded with work without an HCRC, they would be responsible for the full cost of the work regardless of any warranty claim. My dealer, bless his heart, has taken it upon himself to order the part because Kioti has yet (today is November 1) to approve an HCRC. Has anyone else bumped into this sort of red tape and delay from Kioti?

Last, should it be possible to damage the transmission case via operation of the backhoe? Is it a common practice to mount backhoes to a tractor's transmission case rather than to the tractor's frame? Am I wrong in thinking that as long as no damage is done to the backhoe itself, there should be no damage to the tractor to which it is mounted? Or, expressed differently, how could backhoe operations, operations done within the operating constraints of the backhoe itself, cause damage to the tractor to which it is mounted?

Thank you all for your thoughts.

Is it possible to see this break or setup from anyone with a Kioti NX4510???

 

[JimR]

The crack on the right is indeed a crack. I'm certain it wasn't there before. At least not prior to the past couple days. I noticed it when the Break happened.

I think the dark spots you are seeing is hydraulic oil?

I would wash those spots off to see if they change color. If they don't change color then they would be old cracks. I've seen this happen before on cast iron machine parts.

 

[kbforester]

In case anyone is interested. Insurance company is making good on it. This is my own non kioti, non home owner policy.

 

[JimR]

In case anyone is interested. Insurance company is making good on it. This is my own non kioti, non home owner policy.

Good thing you had that insurance policy. Did Kioti turn down your repair?

 

[5030]

Good thing you had that insurance policy. Did Kioti turn down your repair?

Sure looks like a Kubota (not Kioti) CUT to me. Smaller tractors equal lighter cases equal more failures when abused.

 

[JimR]

Sure looks like a Kubota (not Kioti) CUT to me. Smaller tractors equal lighter cases equal more failures when abused.

Nope Kioti NX4510 just like mine.

 

[kbforester]

Sure looks like a Kubota (not Kioti) CUT to me. Smaller tractors equal lighter cases equal more failures when abused.

Its a Kioti 4510. I lifted the fenders.

Cant argue it's case is light

 

[kbforester]

Good thing you had that insurance policy. Did Kioti turn down your repair?

Kioti is doing the repair. Break happened a couple years after warranty and financing