Just look at it this way. You can get a leak anywhere in the brake system. So if you have a line loose at the M/C and it leaks fluid then it has a leak before any fluid even gets to the safety switch or any valve in the system. You can loose all the fluid in half the system and its all lost before the fluid gets to any valve. You will still have half the brake system working with the lower pedal since fluid in the leaking system will cause the pedal to now be pushed farther down to compress the spring in the M/C and bottom out the piston. Don't matter what the valve does because all the fluid in the side that leaks never got to the valve as it leaked right at the M/C line. The safety valve will still move over because the working side will have pressure to move the valve over but the valve cant stop fluid from leaking since it all leaked out before the valve.


You will still have half the brakes with a lower pedal if it has a safety valve or not. That's the easiest way you can look at it and realize the safety valve had nothing to do with it since in that leak all the fluid would be lost in one side. Ron