Can someone shed so light on the brake situation that I have.I installed a re built power booster from Mac's last fall in my 55 Ford with totally new brake system throughout the car I had great brakes last fall being the car sat until today when I started it & discovered I had no brakes so I checked the Master cylinder & it was dry ( of the Dot 5 silicone fluid) so I inturn checked for leaks & found none. I was bleeding the power brake Booster & seen that the fluid was coming out the booster screen area< do you think it is the booster or the MC bleeding into the booster or what?? I did phone the teck guy at Mac's & he said the Dot 5 silicone was the problem just switch back. I'm am hesident on this for I have two other 55/57 Fords that has P/booster with no problems.
Need your input please.
Old Gasser email address ronandjen@xplornet.com

Thank you fellows for your comments & opinions much appreciated. I have been trying to touch base with the company that re-builds these units for the 55/56 Ford ( power brake) boosters but no luck.Would anyone know of a company that re-builds these units?
Thank you for your time.
Cheers Old Gasser.
(Ron)

One place to loook is in Hemmings under "Services Offered".

It's not the dot 5 fluid. I use this in two cars, one a 56 Bird (power brakes)and did not have the problem you have. The internal seal in the booster has failed. It seems to me Mac's should replace it.

54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ