Delete all your old messages to free space on your phone. 1  Go to Settings --> Messages. 2  Scroll down to Message History. Here, you can choose to delete all messages older than 30 days, or all messages older than a year old.  Confirm that you want to delete the old messages and attachments.
Well, the master cylinder is tasked with supplying hydraulic pressure to the braking system. So when you initially step on the brake pedal the linkage activates a piston within the system and this piston then displaces hydraulic fluid.
How It's Done: 1  Inspect brake master cylinder for leaks. 2  Inspect brake booster. 3  Remove and replace the brake master cylinder if faulty. 4  Change the brake fluid. 5  Bleed entire brake system of air. 6  Clean brake fluids from all the wheels. 7  Perform brake safety inspection.he brake pedal will feel soft. When you apply the brakes, the pedal will go all the way to the floor without significantly slowing down or stopping the car. After replacing the brake master cylinder, the mechanic should flush the old brake fluid out and replace it with new brake fluid.