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.
9Repeat this process with each brake until the air is out of each brake line. Donât forget to add brake fluid to the master cylinder after you bleed each brake. 10After you bring the brake fluid level in the master cylinder back to the âFullâ level for the last time, drive the vehicle around the block.