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.
Here is a step-by-step and somewhat simplified look at how brake fluid works within a hydraulic brake system: 1  The driver depresses the brake pedal. 2  The pedal compresses a piston inside the brake caliper. 3  This compression increases the pressure inside the brake lines and sends the brake fluid into motion.