Ford Repair Questions? Ask a Mechanic for Answers ASAP
Cannot get it off the brake booster or are you talking about the fluid reservoir?
Do you have retaining nuts removed that hold the master on the booster?DO you have the brake lines off the master?
You will have to move it side to side to wiggle it loose from the studs. There is a seal between the booster and the master. Also, remove the vacuum line from the booster to release the vacuum.
Can you send a picture of the booster and master cylinder retaining points?
Ok. There is corrosion on the studs that the master cylinder slides onto. If you have not already, spray penetrating oil onto the studs and push down on the front of the master and try to work it free once you allow the penetrating oil to work into the corrosion. The corrosion is built up and is stopping the master from sliding off the studs. You may need to carefully work a flat blade screwdriver between the booster and master to get it loose.
Take the vacuum line off the booster. It should be attached to the upper corner of the booster. It is a large rubber hose with a plastic check valve inserted into the booster through a rubber o ring. What you were hearing is vacuum releasing which is normal.
The air coming from the brake booster. There is a seal between the master cylinder and the booster to keep the vacuum sealed in the booster.
There should be. It is a rubber seal like o ring.
I should fit around the master cylinder section that inserts into the brake booster. It will be about 1/8 " thick.
Be careful with a torch. You do not want to damage the rubber vacuum diaphragm in the brake booster. You damage that, and you will have to also replace the brake booster.
That is the ABS assembly for the anti lock brakes. What is the problem you are having?
It could be the ABS system, the HCU (Hydraulic Control Unit). This is the mechanical side of it and it sends and controls the brake fluid to all 4 wheels.
First, inspect the rubber flex lines to each wheel for kinks and swelling. Then replace the HCU for the ABS system.
The master cylinder will not cause one wheel to lock up. It will either effect all 4 wheels, or just the front or just the rear. The ABS system controls all 4 wheels.
With all 4 wheels up on jack stands. step on the brakes and release. See if any wheels are locked up. Then crack the brake line to that wheel, se if it frees up. If it does, the problem is the HCU.
No. Brake fluid should be clear. New fluid is. If it is green or black, it is either really old and dirty or contaminated with something other than brake fluid.