Brake Proportioning/Combination Valve: Testing and Inspection

INSPECTION





1. Connect the Special Service Tools (SSTs) to the brake pipes by using the adapters as shown in the figure.

Adapter and flare nut tightening torque: 13 - 21 Nm (1.3 - 2.2 kgf.m, 9.5 - 15 ft. lbs.)

2. Bleed the air from the brake system.
3. Depress the brake pedal until the master cylinder pressure equals A, then record rear brake pressure A'.





4. Depress the brake pedal again, and apply additional pressure until the pressure reaches 5,890 kPa (60 kgf/cm2, 853 psi), then record pressure B'.
5. If not within the specification, replace the dual proportioning valve.