Failed master brake cylinder - complete loss of brakes

Noticed the e-brake light illuminated on the way in to work. Checked and verified the e brake was off. Drove 3/4 mile to work (also first safe spot) and parked. Brakes are barely able to stop the truck; the pedal goes straight to the floor.

One side of the brake reservoir is very low.

I suspect the master cylinder has failed and is leaking into the brake booster. I am waiting on a tow truck.

Has anyone here had this happen? Did you replace the brake booster or just clean it out?

 

I just replaced the MC. When same thing happened to me.

 

might want to check all your brake lines for rust too. that fluid went someplace

 

Well had time to take it all apart; all the fluid went in the brake booster. Removed it and cleaned it out, reinstalled it. Just waiting to pick up the new MC tomorrow.

 

What was the cost to replace the master cylinder?

-B