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Proportioning Valve: Inspection

  1. Connect the SST  to the brake pipes with adapters as shown in the figure.

    Adapter and flare nut tightening torque: 12.8~21.5 N.m (130~220 kg-cm, 113~190 lb-in) 

    NOTE: Disconnect and connect the brake pipes with SST  .
    Fig 1: Testing Proportioning Valve
    G02705820
  2. Bleed the air from the brake system.
  3. Depress the brake 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'.
    Fig 2: Proportioning Valve Pressure Graph
    G02705821
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