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We usually always get away with say a 2x4 across one half of the pulley sheave and a pretty good blow with a sledge. The farther off axis the better but you have to use your brain don't go and nail the outer edge of the pulley bare with a sledge as your bound to crack it. The off axis hit makes the wedges want to separate.
 

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Always reuse them.....unless you beat them up with that pipe! Really they're not consumable. Up here 590's were eating the bushings and into the pulley's with those 3 index pins yearly. Must have pulled all the variable speeds on both twice for sure and one 3 times. Finally went to over sized pins and bushings. It would be a non issue if they used a tighter clearance bronze bushing instead of those weak ass plastic ones in the sheaves.
 

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REALLY! Someone tell me the 400 series uses a bronze bushings in the middle between the sheaves.....Cause I've never had one apart. They just don't fail. The 400's have the small plastic bushings on the three index pins.
 
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