Losing brake fluid
FTE Legend
Joined: Nov 2015
Posts: 30,916
Likes: 4,123
From: Angier, NC
That valve does (should) not need to be replaced.
The brake system is a 2 part system, a front and a back, that is why the 2 sumps on the master.
Any way when 1 part losses pressure, front or back, a valve moves inside to block off that leaky side and trips the light to let you know there is an issue with the brakes.
Sometimes taking pressure away on the other side after the fix will push the valve back to center and turn the light off.
Other than that I cant help as mine have always reset themselves >
Dave ----
Elder User
Joined: Nov 2013
Posts: 524
Likes: 0
From: Maryland
Sometimes they just get stuck and need cleaned. Also, I've heard of an O-ring inside there leaking and making the light go off. All that should be holding it in is a pipe plug or big bolt, so you should be able to pop it out pretty quickly and R&R it if need be
Moderator
Joined: Jan 2001
Posts: 56,984
Likes: 2,738
From: Virginia
If the piston has slid to the rear brake system because you a problem back there, once you get it fixed you can open a bleeder on the front and stomp the brake pedal hard so high pressure from the rear system will shove the piston back to the middle.
When you stomp it, keep the pedal down and close the bleeder before you lift so you do not suck air into the brake system.
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