Tlr2,
I find it odd that in your case you lost a part of the telescoping piece. The inner piece I assume? One end is pinned onto the tractor, the other end is bolted to the lower arm. The piece you lost should have had a pin through it. That makes me wonder if you had no pin at all in the telescoping portion on that side. Even if it breaks all the pieces should be attached unless it breaks through the very hole you are using....and that was not the case. Some guys do not like to put the clip back into the pin as you can often just leave it out and gravity holds the pin in place...until it doesn't, and then we have a problem. Of course we will never know exactly how it failed, we can only guess. In either event, I do think that last hole would be better off to not be there. I do not think it is needed, and yet weakens the part at that location. Just my non-engineer opinion.
If you private message or email me with your serial number and dealer info I will make an inquiry for you, although I can't assure you of getting coverage. If we can't get it covered, just take the part to a nearby welding shop and have them make a piece of flat bar and punch some holes in it and weld it on. Because I agree with you regarding the cost of this part...it doesn't make much sense, although it is much much less than you are being quoted. We used to be able to buy just the inner piece for about $100, but I am not sure if they offer it that way any longer. The entire part is roughly twice that amount. I'm not trying to step on any other dealer's toes, but I suspect that your dealer looked at the wrong line when they told you $300. I would think a fab shop could make it for $100.
Ironically it is surprising that New Holland has seen hundreds of similar items break. That is a little scary in itself. But I guess about anything that fails in huge quantities almost condemns itself as being faulty in materials, workmanship or design. But then again, I do not have to write the check for warranty stuff, so I can be a generous fellow with other folks $$. :dance1: