Following a routine Spring brake servicing, there is NO brake pedal pressure at all. It just sinks to the floor when depressed. Now I'm depressed. Ha ha.

Investigation showed that the master cylinder just stopped pushing brake fluid when pressing the brake pedal, which is unexpected and not good.

Can the master cylinder piston shaft somehow get disconnected from the piston for any reason?



Summer 2013 we upgraded the fluid to Motul 600, but that's the only thing done to the brake plumbing since the Rex was acquired in Mar 2013.