Brake Booster failure

[sbobev (Steve)]

Well… not gonna happen. :).

:-((

I needed that test Bob, for sanity check.

This topic came up again (not surprisingly) and led to a heated discussion. Here:

Teves ABS - Project Refurb

On the drawings and from description - it looks like accumulator pressure is retained in rear circuit only, there are seals between both pistons isolating it from each other. Booster piston can apply few milimeters of pressure on the back of master piston to support operation of front brakes, it cannot drop any further forward. So, no - it doesn’t look like burst of front brake hose would drain the accumulator. It would cause loss of pressure in accumulator and would trigger pump operation (pu…