Quote:
Originally Posted by jkv45
Every time you use the brake the fluid level will move down temporarily as you pressurized the brake system.
As the piston in the master cylinder moves to apply pressure to the brake system it will draw fluid in from the reservoir. When you release the brake pressure the fluid moves back.
From the link below -
"As with the rear plunger, it too sucks fluid from the reservoir until the first circuit rear seal passes the fluid intake and return port (again about 1.5mm), trapping fluid between it and the front of the master cylinder. This fluid is then forced out into the first brake circuit, applying those brakes.
When you take your foot off the brakes, the return springs push the plungers back into their neutral position. Fluid returns to the brake fluid reservoir and the system goes back to an unpressurised state."
Read more: http://www.carbibles.com/brake_bible...#ixzz3Is6z8Rie |
you seem to be explaining this to me when i explained this in the message above that you probably didn't read. but as the pad wears down the cylinder in the caliper has to extend further out, this requires the caliper be filled with more fluid than it would have been at the start of the pad life.