Piston ring compressor tool for air compressor rebuild?

Bill Crowell said

Good point, Tooljunkie. I didn't happen to have the right size hose clamp at the time. I'd better pick one up the next time I go to the auto parts store.

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If you are inserting the piston into the bottom of the cylinder where the taper is, the hose clamp will not work, only if you are putting it in the top. Some compressor piston rod to crankshaft bearings are wider than the diameter of the bore so you have to go in from the bottom on those and you simply work them with your fingers or maybe a wooden popsicle stick.