I have no power brakes (boost) on my 71 Series III, just a hard brake pedal. Other than a possible leak in numerous hoses, what other potential issues could be causing the problem? Vacuum check valve? Any suggests for identifying the problem?

Submitted by coventryclassi… on Tue, 07/29/2014 - 11:03

If you nave been adding brake fluid, with no apparent leak, it is possible the rear seal on the master cylinder is leaking into the booster, and filling it up with fluid. We need more information to better help.
Cheers Tom

Submitted by NE23-54945 on Mon, 07/28/2014 - 22:38

Have you driven the car in the last 10 years or so.......could be booster,check valve, frozen calipers and all the rest.
A lot of people forget the last time they drove the car time goes by crumbling the whole system. If you have driven it, the booster/diaphragm and or seals in the brake master could be shot.
Good luck, ps. change all the fluid to.
gtjoey1314