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.
Look for signs of leaking on the clutch master cylinder. The clutch master cylinder should be dry and free of sticky grime or sludge. If it is covered in grime, clean it off with a rag and some brake cleaner to make it easier to identify signs of a leak. If the brake fluid in the reservoir was very low before filling it, there may be a leak.