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Quick update. The dealer is replacing the broken casting at no cost to me. They told me they have never seen anything like this before. This is great customer service. Thanks again for the advice.

Thanks for all of the input - I appreciate it. The dealer specifically told me to always have the pin in when driving tractor around for safety reasons. He indicated that the boom can swing left or right and represent a crushing hazard. I agree with some who posted that the fracture is a brittle...

Here are some photos of the wear Here are some photos of the wear

The pin fits in the casting hole loosely. I used the tractor for moving wood chip over some pretty bumpy ground for most of the 8 hours. The wear on the pin lines up with the lower edge of the casting hole and the casting shows wear in one location where the pin rests. I am thinking that the pin...

No I didnt hit anything with it. Pin was in when it broke. I noticed a fair amount of wear on the pin and a fair amount of wear in the hole that the pin fit through. You have heard of this before? Wonder if its undersized or a defect in casting?

I just bought a new 3302 tractor with a BH77 excavator attached from dealer. I have only 8 hours on tractor, and have barely used the excavator. Yesterday this casting broke - its at the area where the safety pin is installed to keep excavator from swinging from right to left. Has this happened...