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I bought an old 8" 3 HP Everett abrasive cutoff saw- while researching their website, came across these instructions, which suggest clamping broken pieces of cutoff wheel in the vise and easing the saw in to unload the wheel. Old hat to the regulars here, I'm sure, but new to me.
Picked up an old 2 HP grinder with a fine green wheel and a medium green wheel this morning. This thing definitely weighed over 400 pounds including the pedestal. We used a chain hoist to load it and I unloaded it with a Bobcat. With care I can move it with a hand truck but if it goes too far over it's going down.