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Proportioning Valve

CAUTION: DO NOT attempt to adjust the proportioning valve.
  1. Disconnect brakelines from proportioning valve. Connect Fluid Pressure Gauge and Adapter (0KK30-140-001) to proportioning valve. Reconnect brakelines to fluid pressure gauge and adapter. See Fig 1 . Tighten adapter and brakeline flare nuts 10-16 ft. lbs. (14-22 N.m). Bleed air from brake system.
  2. Depress the brake pedal until the front brake pressure is equal to brake pressure specification "A". Observe and record rear brake pressure specification "A". See PROPORTIONING VALVE PRESSURE SPECIFICATIONS  table. See Fig 2 .
    PROPORTIONING VALVE PRESSURE SPECIFICATIONS

    Application Specification
    Front Brake Pressure
    "A" 427 psi (30 kg/cm2 )
    "B" 1422 psi (100 kg/cm2 )
    Rear Brake Pressure
    "A" 427 psi (30 kg/cm2 )
    "B" 725 psi (51 kg/cm2 )
  3. Depress the brake pedal again, and apply the additional pressure until front brake pressure specification equals "B". See PROPORTIONING VALVE PRESSURE SPECIFICATIONS  table. Observe and record rear brake pressure specification "B". If fluid pressure is not as specified, replace proportioning valve assembly. See PROPORTIONING VALVE  under REMOVAL & INSTALLATION.
  4. Remove fluid pressure gauge and adapter from proportioning valve. After testing and/or proportioning valve replacement, reconnect brakelines. Bleed the air from brake system and check for the fluid leakage. See BLEEDING BRAKE SYSTEM  .
Fig 1: Attaching Proportioning Valve Test Gauges
G00285420Courtesy of KIA MOTORS AMERICA, INC.
Fig 2: Testing Proportioning Valve
G00285419Courtesy of KIA MOTORS AMERICA, INC.
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