Citroen 2cv special tools | home
master cylinder assembly tool
If you repair a dual circuit master cylinder, you need to withdraw and re-insert 2 roll pins that hold everything in place. The parts are under spring pressure.
By compressing everything inside by hand first and by using this tool, it will allow you to release your hand and remove or insert the pins.
It is another pair of hands, very useful.
The small hook fits into the brake pipe union hole and the larger hook then holds all the internals under compression.
Press the tool in and slip the small hook into the pipe hole.
Take the pins out and slowly release the tool. The internals can now be dismantled.
Single circuit cylinders either have a circlip or a brass plug or one pin which secures everything.