First off, soak the heck out of those broken off bolts. I would leave them sit for a few days. Then, take a hammer and lightly tap on the top of the broken bolt. This will help break rust and potentially vibrate some things loose. You can try vise grips again, but try working the bolt back and forth gently first to see if it will move. Spray, wiggle bolt, spray, wiggle bolt. If it happens to break loose, keep doing that procedure until it comes out. If this does not work, center punch the broken bolt and drill it out for an easy out, or drill the bolt out and re-tap the threads. Make sure you drill the bolt out just enough that it dosen't ruin the original threads. With my luck of doing this it's almost worth it to take it to a machine shop where things are square and precise. Just my .02 hope it helps.
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Wendy Oaks IH Cub Cadets, Springville, IA.
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