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You break off the fiber till you can get a chisel aimed at one corner of the keyway,a few raps and the hub will split. When driving the new one on you MUST hold the camshaft so it wont go back and knock out the welch plug at the back of the cam. Snap on made a tool for this at one time but you can do it with a bar. DO NOT try this with other engines some have cast shafts and will break. No I didnt but I saw it happen to a Studebaker.This is for 235 and older engines
