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Home >> Acura >> 2003 >> MDX Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 73 (Conventional Brake Components) >> Master Cylinder Replacement

Master Cylinder Replacement

WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • Do not spill brake fluid on the vehicle; it may damage the paint; if brake fluid gets on the paint, wash it off immediately with water.
  • Be careful not to damage or deform the brake lines during removal and installation.
  • To prevent the brake fluid from flowing, plug and cover the hose ends and joints with a shop towel or equivalent.
  1. Open the air cleaner housing cover (see AIR CLEANER ELEMENT INSPECTION/ REPLACEMENT ).
  2. Remove the reservoir cap and the brake fluid from the master cylinder reservoir with a syringe.
  3. Disconnect the brake fluid level switch connector (A).
    Fig 1: Brake Fluid Level Switch Connector With Torque Specifications
    G05486807Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Disconnect the brake lines (B) from the master cylinder (C). To prevent spills, cover the hose joints with rags or shop towels.
  5. Remove the master cylinder mounting nuts (D).
  6. Remove the master cylinder from the brake booster (E). Be careful not to bend or damage the brake lines when removing the master cylinder.
  7. Remove the O-ring (F) from the master cylinder.
    NOTE: Replace the O-ring whenever the master cylinder is removed.
  8. Install the master cylinder in the reverse order of removal, and note these items:
    • Check the brake booster pushrod clearance (see BRAKE BOOSTER PUSHROD CLEARANCE ADJUSTMENT  ).
    • Coat the new O-ring with silicone oil (Shin-Etsu KF 54).
    • When you apply the silicone oil, make sure not to get any on the terminal part of the connectors and surrounding switches. Also do not touch the switches and the terminal part of the connectors with hands or gloves that have silicone grease on them.
    • Check the brake pedal height and free play after installing the master cylinder, and adjust it if necessary (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT  ).
  9. Bleed the brake system (see BRAKE SYSTEM BLEEDING  ).
  10. Spin the wheels to check for brake drag.
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