B2650 rear end crack

[Tomcatorange]

The roll bars on my B2650 are attached to the rear end housing of the tractor and not the frame. The rear end housing was replaced once under warranty but now it cracked again and not under warranty. I wonder if this would be repaired by welding the crack or J B welded. The housing is aluminum. Any thoughts.

 

[cre73]

Most likely no, but if you could post some pictures it would help us understand the severity of the issue. Also welcome to the site!

 

[SRG]

Sometimes....

Repairs that have been made under warranty, and then return again outside of the warranty, can sometimes be fixed again at the dealer/manufacturers expense. I would look into it being repaired again under a warranty claim, because it is the same issue that happened while under warranty.

 

[200mph]

I’m curious to know...

Did the dealer give you a root cause on why the crack occurred in the first place? Is the second crack in the same place as the first or different? Seems strange you’ve had to contend with two failed rears due to cracks.

Perhaps it is a bad casting and should be replaced.

 

[Fordtech86]

Pics would be good, and like 200 said is it the same spot? Is it cracked where the ROPS is mounted too? Could it be the ROPS isn’t “square” where it’s mounted and the dealer forcing it to line up the bolt holes to install it? If the dealer doesn’t help out do you have Kubota insurance on it? Could maybe make a claim on it?

 

[whitetiger]

If it is cracked at the rear facing bolts, see how much thread of the bolts thru your ROPS is screwed into the axle housing? If there is approximately only 1/2" or so, when the ROPS was installed during setup they probably reused the shipping bolts. There are longer bolts sent to be used when installing the ROPS and some setup guys cannot read simple instructions.

 

[SidecarFlip]

cracks in castings don't just mysteriously appear. I suspect there is more to the story than what the OP is alluding to.

Like Paul Harvey said.... Now, the rest of the story....

 

[D2Cat]

Hey Flip, listen to Whitetiger. He's telling you the rest of the story.

The ROPS was bolted on by the dealer originally, a failure occurred and the dealer repaired it, then it failed again in the same place.

Then a Kubota tech tells what sometimes happens and needs to be checked out.

 

[Greenhead]

I hate cliffhangers... What HAPPENED??

 

[SidecarFlip]

Hey Flip, listen to Whitetiger. He's telling you the rest of the story.

The ROPS was bolted on by the dealer originally, a failure occurred and the dealer repaired it, then it failed again in the same place.

Then a Kubota tech tells what sometimes happens and needs to be checked out.

I read that. My issue is... I'm sure he don't have the only tractor where the rops is bolted to the case. He did something to cause the break (maybe ran the rops into something like a garage door header or tree limb. They just don't fail for no reason and not 2 times in a row.

The rest of the story (rootcause) is unknown in my view.

 

[D2Cat]

It would seem to me the original poster should determine the depth of the bolts to see if the correct bolts were used. If the bolts are too short it would be a reason to be a consideration of the failure.

 

[North Idaho Wolfman]

I read that. My issue is... I'm sure he don't have the only tractor where the rops is bolted to the case. He did something to cause the break (maybe ran the rops into something like a garage door header or tree limb. They just don't fail for no reason and not 2 times in a row.

The rest of the story (rootcause) is unknown in my view.

The root cause that it breaks is because of too short of bolts, they don't provide enough holding power without proper engagement of the threads.
You don't have to do anything to cause it to happen, it happens just from normal vibrations and use.