Brake Proportioning/Combination Valve: Testing and Inspection

Inspection





1. Connect the SST to the brake pipes with adapters as shown in the figure.
Adapter and fare nut tightening torque:
12.8 - 21.5 Nm (130 - 220 kg-m, 113 - 190 inch lbs.)

Notice Disconnect and connect the brake pipes with SST

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





4. Depress the brake pedal again, apply the additional pressure until the pressure equals to B; then record the pressure B.