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Bendix Treadle-Vac


Kornkurt
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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!

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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.

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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?

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