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I agree - the only physical connection holding the piston in is the piston center shaft and the MC shaft. I can see the MC shaft bottom out when the flange hits the MC body. This is where the piston is at the out most position. It must be as suggested, the two shafts have bonded from being idle...

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I attacked the booster with a 5lb slide hammer. I managed to pull the piston shaft completely out - the piston remains rock solid' I am missing something simple. Roy (Merc Cruzer) sent me copies from the merc mm. My unit is some different. I will try to attach a few pics. Bill

Hi Bill, Thanks for the response. I have removed all the vac stuff from the can. I also,at your suggestion, removed the nut and comp valve from the MC, The piston moves freely up and down and can be rotated easily. I can see the MC shaft and it looks OK. The piston still feels like it hits a...

Hi - I am trying to rebuild the treadle vac brake booster from my 59 Edsel Corsair. I have not gotten very far - I cannot get the vacuum piston out of the can. I have scoured the internet and every reference I can find indicates that it should just pull out. I have tried mineral oil bath...