Brand new 1735M broke after ~3hrs of use. Is this a freak occurrence?

[Bigpuddie]

I feel certain that Massey Ferguson will stand behind that...maybe even offer a new tractor to you

 

[WranglerX]

Did the bolt have a shoulder on it?...

Dale

 

[5030]

Pizz poor execution in my view.

 

[TMGT]

I can't believe they went with a single shear for the 3pt mount on a tractor that size.
I hope this was just a one time fluke for you, but from a design standpoint that's not a great setup.

 

[thclimer]

Our Massey 1736 has a similar design with only one side supported on the lift arm, see attached picture.

Because of the ball-socket attachment style the lift arms are able to swing out freely and touch the side of the tires as well as freely swing in and touch the PTO shield when the adjustable stabilizers are not engaged. There is also "slop" on the stud which goes through the ball, hence the cotter pin through its threaded end which captures the nut preventing the stud from falling out

With all this "slop" in the linkage, its difficult to understand how an undue twisting force could be applied to the tab which broke.

I'm not sure how many other models of Massey's have this design but there has to be quite a few in service by now and I haven't heard of any other failures, has anyone else?

This sure seems to be a unique case where there must have been a defect somewhere in the casting.

 

[5030]

In my view, it's still a poorly executed design.

 

[Jchonline]

Do you remember hitting anything? That must have been some rotational force to snap it off. Can you tell which direction it snapped in? Did it bend the 3PT link arm at all?

 

[TMGT]

Our Massey 1736 has a similar design with only one side supported on the lift arm, see attached picture.

Because of the ball-socket attachment style the lift arms are able to swing out freely and touch the side of the tires as well as freely swing in and touch the PTO shield when the adjustable stabilizers are not engaged. There is also "slop" on the stud which goes through the ball, hence the cotter pin through its threaded end which captures the nut preventing the stud from falling out

With all this "slop" in the linkage, its difficult to understand how an undue twisting force could be applied to the tab which broke.

I'm not sure how many other models of Massey's have this design but there has to be quite a few in service by now and I haven't heard of any other failures, has anyone else?

This sure seems to be a unique case where there must have been a defect somewhere in the casting.

Any pulling or pushing force on the arm will apply a rotational force to the mount since the pin is in single shear and is mounted to a swivel eye.

 

[thclimer]

Any pulling or pushing force on the arm will apply a rotational force to the mount since the pin is in single shear and is mounted to a swivel eye.

Certainly true, but my point is how many units of this design are in service? More than 100 maybe more than 1,000. How many have broken? Its doesn't seem like many as this is the first I have know of, maybe there are others. However, with the others that are in service I would have to believe some of them have pulled a implement utilizing their 3-point hitch and applied a shear force that is not enough to brake the casing, indicating something abnormal happened here.

It appears that a larger Massey's (1750M and maybe others) do utilize 2 tabs, one on each side of the stud, so Massey must have decided they needed addition structure for the mount. I just hope this was just a manufacturing defect and Massey stands behind the warranty, especially since this this seems like it was the first pull with this tractor.

 

[Bigpuddie]

Could also just have been a weak casting