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Home >> Kia >> 2012 >> Optima Hybrid >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc Brake System - HEV >> Repair procedures >> Bleeding of Brake System

Bleeding of Brake System

CAUTION:
  • Do not reuse the drained fluid.
  • Always use genuine DOT3/DOT4 brake Fluid. Using a non-genuine DOT3/DOT4 brake fluid can cause corrosion and decrease the life of the system.
  • Make sure no dirt or other foreign matter is allowed to contaminate the brake fluid.
  • Do not spill brake fluid on the vehicle, it may damage the paint; if brake fluid does contact the paint, wash it off immediately with water.
  • When bleeding air, make sure the brake fluid is above 10mm starting from the "MIN" line.
    Fig 1: Identifying Brake Fluid Dimension
    G08308519Courtesy of KIA MOTORS AMERICA, INC.
  • To remove the reservoir tank cap to refill the brake fluid, always close the air shut-off valve of the SST.
  1. Before changing brake lines or related parts, perform the air bleeding procedure mentioned below.
    1. BAU and reservoir replacement: AHB brake system air bleeding.
    2. HPU and HPU brake line replacement: HPU & BAU line air bleeding.

      But if the brake fluid level is below "MIN" perform the AHB brake system air bleeding.

    3. ESC or ESC brake line replacement: ESC brake line and brake wheel air bleeding.
    4. Brake caliper assembly and brake wheel line replacement: Brake wheel line air bleeding.