Master cylinder can have "residual check valve" that will allow the fluid to flow back as long there is a strong spring pushing the actuator back. nominally ~10 psig in the line
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.