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Proportioning Valve

  1. Connect 2 pressure gauges to proportioning valve. One to the input port of the proportioning valve and the other to the output port of the proportioning valve. See Fig 1 . Bleed brake system. Refer to BLEEDING BRAKE SYSTEM  .
  2. Depress brake pedal until pressure gauge reads as specified and check output pressure. See PROPORTIONING VALVE PRESSURE SPECIFICATIONS  .
  3. Depress brake pedal again, applying additional pressure. Recheck output pressure. See PROPORTIONING VALVE PRESSURE SPECIFICATIONS  . If output pressure is not as specified, replace valve.
PROPORTIONING VALVE PRESSURE SPECIFICATIONS

Inlet Pressure psi (kg/cm2 ) (1) Outlet Pressure psi (kg/cm2 )
356 (25) 356 (25)
641 (45) 441 (31)
1424 (100) 669 (47)
(1) Outlet pressure specification is approximate.
Fig 1: Identifying Brake Proportioning Valve
G94F46420Courtesy of KIA MOTORS AMERICA, INC.