Thanx for all the input.
Let me say that I'm not faulting anything other than myself. The snow that I was pushing at the time of the bend was loose snow that I had broken up with the loader and toothbar. There happened to be some that wasn't and I caught the outer most edge of the blade. After thinking about the happenings I came to this conclusion. As I was pushing through the loose snow the blade caught. Knowing as with most any kind of pushing or pulling once you start to spin you lighten the resistance, lifting the implement or FEL. This is what I did and do on a regular basis. My proplem was I moved the position control lever all the way up instead of just a little bit and if that didn't work push in the clutch. I didn't do that .That is where it happened. I have moved snow in this manner (widening roads) for 2 winters and have pushed a lot harder with the blade than I did the day the draft link bent. But it bent becuse the load was not centered and I tried to lift the blade to full height during the off center load. I continued to use the blade for a few more hours pushing snow and nothing else bent but I didn't catch an off center load either.
As far as strengthening the arm, I will not do that. I believe something needs to give I would rather have a arm bend than break a housing. I might retro fit the turn buckle adjuster to a slide type. It is a pain to tighten the jam nut and the slide type would be better and quicker for that anyway. I don't think that it is right to say 3pt are not designed to push. I agree that the first design was to pull. I can't find anything that states you should not push with the 3pt. The manual for the blade doesn't say anything. There are other implements that need to be pushed, like snowblowers, blades, rakes, scoops and maybe others that I don't know about. I will say that one would need to use common sense when doing something with an implement.
I use chains and loaded rear tires. The tires I did not load for traction but more for ballast. The added traction is a bonus, for me anyways. The chains I use are very basic simple chains, same as the duo-grip without the v-bar. I need these due to ice and very hard packed snow. Also some of these driveways are pretty steep and icey. With out chains you would not go up hill at all even without pulling or pushing a load.
I have not fixed it yet. I'm busy with other stuff at work. But hope to have it done by this weekend, hopefully. I plan on using a press.
Thanx for all the comments and suggestions.