OEM Chevrolet Lumina Brake Master Cylinder

Chevrolet Lumina Brake Master Cylinder Parts and Q&A

• Master Cylinder
  18029914
  Q: How to overhaul the brake master cylinder on Chevrolet Lumina?

  A:

  Brake Master Cylinder overhauling begins by taking out the abs hydraulic modulator and master cylinder first. Clean the reservoir cap before you remove the cap and diaphragm from the device. Replace the caps and diaphragm when you notice cuts, cracks, nicks or deformation. Rideshare the fluid level sensor along with the proportioning valves should they exist. You should carefully remove the retainer during primary Piston depression to prevent damage to any components. Introduce low pressure non-lubricated compressed air through the upper outlet port at the blind end of the bore to extract the primary Piston and secondary Piston and the spring as well as spring retainer. Before inspecting the master cylinder for damage, remove the seals and spring retainer from the secondary Piston and check for scoring or corrosion. Use clean denatured alcohol to clean all parts before drying them with non-lubricated compressed air. Start assembly by placing lubricated seals and spring retainer onto the secondary Piston followed by insertion of the spring and secondary Piston into the cylinder bore where you should lubricate with clean brake fluid. After installing the lubricated primary Piston use your fingers to depress it before installing the retainer. Reinstall both the fluid level sensor and proportioning valves if they exist in the system. After inserting the diaphragm into the reservoir cap you can attach the cap onto the reservoir before reinstalling the abs hydraulic modulator and the master cylinder.
• Master Cylinder
  18029965
  Q: How to replace the ABS Control Module and Brake Master Cylinder Assembly on Chevrolet Lumina?

  A:

  Begin replacing the brake modulator/master cylinder assembly by executing the gear tension relief procedure with the scan tool because it prevents injuries associated with brake modulator tension. Terminate the connection of the two brake solenoid valve electrical wires and disconnect the brake fluid level indicator sensor connection and abs brake motor vehicle assembly's 6-way cable. You should first remove the four brake pipes followed by the two nuts used to secure the abs brake modulator/master cylinder assembly to the vacuum booster before taking out the assembly. Replace the abs brake modulator/master cylinder assembly inside the vehicle after securely mounting the two nuts which need to be tightened to 27 nm (20 ft. Lbs.). Secure the tube nuts to 24 nm (18 ft. Lbs.) when installing the four brake pipes onto the assembly. Rejoin the abs brake motor pack with its 6-way electrical connector and connect the brake fluid level indicator sensor electrical connector and both brake solenoid valve electrical connectors . Finally, bleed the system.