Quote:
Originally Posted by Jack E/NJ
Richard (EV8G)>>>If pressure is lost in either end, the MC piston must travel much more to recover brakes in the surviving end. Without sufficient pushrod travel, this cannot happen and there will be no brakes.>>>
Sadly, this situation exists even for some modern factory-installed duals. I had a 1993 wagon that popped a rear line while slowing for a red traffic light at the bottom of a hill. Pedal to the floor and no front brakes either. Handbrake wasn't enough to stop the wagon from running the red light. Luckily no other car was going thru the intersection green light as I sailed thru. Poor design engineering.
Jack E/NJ
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This situation would
only happen IF there were other serious problems or failures with the brake system. Yes, the pedal
will travel farther when one system fails, but should not go to the floor. That's fact, not opinion, based on FMVSS 105/135 brake system compliance that vehicles must meet using hydraulic brakes since 1967.
In your case, worn out pads and/or rotors, loose wheel bearings that allow too much caliper piston retraction, an internal problem (leak) with the master, etc, could have caused the total pedal loss. With a displacement issue, an extra pedal pump usually will bring that system back to working order. If the brakes are all in good working order, a hydraulic failure will allow FULL braking in the remaining system, although with longer pedal travel.
