12/13/2011 4:12 PM
These castings are NOT threaded when new. Toro uses a self tapping bolt in them, and yes, I have snapped plenty. I am now in the habit of soaking them front and back prior to disassembly or adjustment. When I think about it, I'll take them apart, tap the holes, and reassemble with plenty of antisieze. For the broken bolts, sometimes they break off proud and you can grind them flat and center punch. I have also put a nut over the broken bolt, and spot weld it to the broken bolt. The heat will help you loosen it, and the weld wont penetrate the aluminum. I have had success with this, but not 100%. I have plenty of these units that are a bolt or two short.