Kornkurt Posted August 24, 2022 Share Posted August 24, 2022 My 1956 Pontiac has a Bendix Treadle-Vac. power brake system. I had it rebuilt in 1984 and it worked fine until this spring. It didn't have much pedal and was low on fluid. I added fluid, but it didn't help. I ordered a rebuild kit and had a local shop rebuild it. The car stops good, but it takes more pressure on the pedal than in the past. Any thoughts on what might have changed and what to look for? Thanks! Link to comment Share on other sites More sharing options...
EmTee Posted August 24, 2022 Share Posted August 24, 2022 Check (or, if it has been awhile just replace) your brake hoses. I had a hard pedal on my Riviera that I assumed (yeah...) was a faulty booster. Eventually it progressed to the point where the rear brakes were dragging. Replacing the hoses restored my power brakes. As it turns out, the shop manual does list 'brake pipe restriction' among the possible causes for a hard pedal. Link to comment Share on other sites More sharing options...
JACK M Posted August 24, 2022 Share Posted August 24, 2022 6 hours ago, EmTee said: As it turns out, the shop manual does list 'brake pipe restriction' among the possible causes for a hard pedal. Possibly stuck wheel cylinders. Has it been parked for a while? 1 Link to comment Share on other sites More sharing options...
NailheadBob Posted August 24, 2022 Share Posted August 24, 2022 Check large vacuum supply hose is collapsing inside and has restriction to brake booster. Bob Link to comment Share on other sites More sharing options...
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