3-Point Hitch Top link mount tore off back of differential case

   / Top link mount tore off back of differential case #91  
You keep pulling on those thin castings, and sooner or later, something is going to give!

That's the point I was trying to make earlier. Nothing, including the top link should be attached to the transmission casing. Everything should be supported by the frame somehow. WoodMaxx and whoever else makes these should be providing additional bracing kits if necessary.
 
   / Top link mount tore off back of differential case #92  
So whats the cost on fixing this, 1k for trans case and 2k for labor, the biggest concern for most tractor owners is finding the right dealer/person to do the fix.

And for those concerned with a back-hoe on their compact Kubota's, it dont take a back-hoe to break the trans hosing on kubota, a pto winch broke mine but mine was fixable well sort of, least I was able to get it usable again by a very helpful tip on TBN. It was a forgotten Kubota secret accessory that should be put on every compact Kubota that does any kind hard pulling work. I welded the crack best I could but I dont trust cast welding alone, and that top link needs to be on something more solid then that thin trans housing anyways. I had mine apart and those Kubota trans casting are to thin for yanking on IMO, it's approx 5/16" at best, the top link shouldn't be on the trans housing by itself.

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   / Top link mount tore off back of differential case #93  
I didn't mean torsional load when looking from the back, I meant torsional when looking at the top link bracket from the side.

I cant tell if the BH top link will contact the lower unused pin, but it looks like it could.
If setup properly it shouldn't be able to lower enough to bind on that pin, but we don't know if it was setup properly or not.

If the BH/tractor was well used and beat up I would say fatigue, but looking at the condition of both I dont think that's the case.

The top pin/s binding would introduce a very high load localized to the top link bracket in a way it wasn't designed to handle.
 
   / Top link mount tore off back of differential case #94  
I thought we covered this, but maybe not.

The toplink never moves up and down. It can't because of the triangular design of the Woods mount.

When you push the backhoe bucket into the hard ground the top link pushes toward the tractor.

When you lift the backhoe bucket the top link pulls away from the tractor.

This is no different than any other 3pt attachment.

But it's ability to exert greater push/pull forces is.
Its not supposed to, but if this was just mounted it could have been set down on that pin and then the triangulated links set.

If this had appeared to have been a previously used setup it would be less likely.

Since it looks like it happened before being used I'm thinking it might be a setup issue, not a usage issue.
 
   / Top link mount tore off back of differential case #95  
... This is no different than any other 3pt attachment. But it's ability to exert greater push/pull forces is.

Richard, this time you said it best. :)
 
   / Top link mount tore off back of differential case #96  
FWIW, I just checked my Owner's Manual for my L4330 "Implement Limitations, page 12:

Backhoes:

Max digging depth, 90 inches.
Max weight: 990 lbs
Subframe: Necessary

This OM covers models L3130, L3430, L3830, L4330, L4630 and L5030.

By saying "subframe necessary", I'm guessing that that precludes the use of a 3ph backhoe.

As I stated previously, I have the same manual as the OP. I don't see any mention whatsoever of backhoes. The only place I see it mentioned is in a generic safety pamphlet which comes with all Kubotas.
I also read the warranty, and didn't see it mentioned there either.
 
   / Top link mount tore off back of differential case #97  
As I stated previously, I have the same manual as the OP. I don't see any mention whatsoever of backhoes. The only place I see it mentioned is in a generic safety pamphlet which comes with all Kubotas.
I also read the warranty, and didn't see it mentioned there either.
In the operators manual they list the subframe as "necessary " under the backhoe in implement limitations. Don't remember seeing anything specific to 3pt mounted.
 
   / Top link mount tore off back of differential case #98  
In the operators manual they list the subframe as "necessary " under the backhoe in implement limitations. Don't remember seeing anything specific to 3pt mounted.

I finally found what you are referring to. Maximum depth; 90 inches. Maximum weight; 926 lbs.

Subframe Necessary. I suddenly hear an echo. :D
 
   / Top link mount tore off back of differential case #99  
I finally found what you are referring to. Maximum depth; 90 inches. Maximum weight; 926 lbs.

Subframe Necessary. I suddenly hear an echo. :D
They definitely don't highlight it though!
 
   / Top link mount tore off back of differential case #100  
I did, because it took me so long to find what everyone was telling me is there.
 

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