Treadle vac disassembly snag

Posted by Scott On 2019/5/25 19:24:23

I've recently acquired a '55 400 with about 54K miles on it but having sat in a barn for the past 30 years.

I've removed the treadle vac unit as the brake fluid was all crystalized and am disassembling per Ross Miller's instructions but have hit a snag. The power piston moves freely but it appears solidly connected to the master cylinder piston. If I remove the compensator valve the power piston comes out a bit more but still hits a hard stop at the end of the master cylinder piston travel.

I've tried prying out the power piston as much as possible without risking breaking something but it won't let go. Am I missing something?

Scott