last december,I replaced every part of my brakes except the metal lines,booster and proportioning valve. one day I checked my fluid and it was almost gone! so I checked for leaks and didn't find anything,I topped it off and have been taking it easy. it has kept for weeks but the connections and flange to the booster all around the m/c seem moist,when I first discovered this there was also fluid residue around the vaccume fitting. I forced the brake down several times today,after wiping down all suspected areas and found a leak coming from the prop. valve area. what should I check for here? is there anything known to go bad around there? is the random brake fluid moisture around the m/c normal or is the new m/c already going bad too?

 

You definatly have a leak. When you changed the parts did you strip any fittings? Did you use teflon tape on them? The flares on the lines may be bad.

 

also you could have a leak in your brake booster and it is sucking the fluid into the motor and just burning off. could be it but im no rocket scientist!

but id happened to me in my truck before