Operation CHARM: Car repair manuals for everyone.

Brake Proportioning/Combination Valve

- With Master Cylinder pressure @ 2,452 kPa (356 psi) the rear brake pressure should be 2,452 kPa (356 psi).

- With Master Cylinder pressure @ 7,845 kPa (1,138 psi) the rear brake pressure should be 4,452 kPa (646 psi).