OEM Cadillac DTS Brake Master Cylinder

Cadillac DTS Brake Master Cylinder Parts Questions & Experts Answers

• Master Cylinder
  19209200
  Q: How to service and repair the Brake Master Cylinder on Cadillac DTS?

  A: Begin Brake Master Cylinder maintenance by mounting the flange to a vise so you can access the primary Piston at its rear end. Install fittings with matching flare seats onto the master cylinder ports before placing them in clean reservoir solutions. Lead the transparent hoses to the master cylinder reservoir through fittings which match the required flare seat. Delco supreme 11(R) or gm p/n 12377967 (Canadian P/N 992667), or equivalent dot-3 brake fluid should be used to fill the reservoir to achieve a minimum halfway point while the hose ends should remain submerged under fluid. A round-shaped tool helps you push and pull the primary Piston with a 25mm (1 inch) journey depth multiple times to observe fluid movement from the ports. Air removal from the pistons causes the primary Piston to become harder to depress while its travel distance shortens. Climb through multiple pumping cycles to achieve fluid drainage without bubble formation through the ports. Follow these steps to remove the transparent hoses: replace the master cylinder reservoir cap and diaphragm while taking off the fittings with hoses from the ports then wrap the master cylinder in a clean shop cloth to avoid spills. The vise should release the master cylinder before the operation ends.