1965 fury front brake

[buicker]

Hi! On My 65 fury with power brake and drum brake on all wheel , the front brake don't come back, I have changed the wheel cylinder, and the spring, but still the shoe won't come back all the way, this mean that as soon as I touch the brake the front wheel will locked. I am wondering if the master cylinder could cause this the problem?

 

[Big_John]

Brake hose is probably the culprit. typical hose failure has the inside failing and it starts to act like a one way valve... That is it lets the higher pressure activate the brakes, but the springs aren't enough to let the cylinders retract.

 

[Big_John]

Here's a video illustrating the problem. Yea, this is a disc brake caliper, but it's the same principal.

 

[buicker]

Brake hose is probably the culprit. typical hose failure has the inside failing and it starts to act like a one way valve... That is it lets the higher pressure activate the brakes, but the springs aren't enough to let the cylinders retract.

hoses are not that old , a few years, but i'll check that.

 

[buicker]

I changed the the hoses few weeks ago so far,so good but I keep an eye on it, it sem like the pedal is slowly comming up. I hope the problem won't come back

 

['66 Fury I]

If the master cylinder is not returning enough to clear the relief port, pressure will not release. Could be a weak spring in the MC or problem in the booster. Also, what if a residual pressure valve in the MC is failing? Have you switched to a dual MC? You should- for safety sake! AMHIK!! Lindsay

 

[buicker]

Yes a long time ago I siwtched for dual MC and power brake. Now just hoping that after changing the rubber hoses it doesn't do it again. So far the pedal raised from when I changed the hoses, I hope it stay that way, I have drove the car 300 miles since I changed hoses, and this week I will drive about the same. If it comme to the point it was before I will change MC and booster.