Bad wheel cylinders?
#1
Bad wheel cylinders?
So I finally changed the directional valve on my '72 Supreme (with the help of my buddy Mike), and the good news is, my dash brake light is no longer on. The bad news is, when we bled the rear brakes, we got barely a trickle of fluid. Hence to say at this point I have no rear brakes. So we removed the line from the wheel cylinder and at that point there was plenty of fluid coming out when I pressed down on the pedal.
I will also add that before, I had to step on the pedal very little and it was a hard pedal, and I never bothered to check the rear brakes because the car stopped good. Now I get about 3/4 pedal travel, but it's firm.
So a couple of possibilities we talked about are..
1) The wheel cylinders clogged with debris, thus not allowing the fluid to get to the bleeders, or...
2) The rear brakes are out of adjustment and the wheel cylinders are fully extending before the brakes are engaging and the fluid doesn't have a chance to get to the bleeders.
Thoughts?
I will also add that before, I had to step on the pedal very little and it was a hard pedal, and I never bothered to check the rear brakes because the car stopped good. Now I get about 3/4 pedal travel, but it's firm.
So a couple of possibilities we talked about are..
1) The wheel cylinders clogged with debris, thus not allowing the fluid to get to the bleeders, or...
2) The rear brakes are out of adjustment and the wheel cylinders are fully extending before the brakes are engaging and the fluid doesn't have a chance to get to the bleeders.
Thoughts?
Last edited by 72455; May 19th, 2023 at 03:55 AM.
#4
#6
I went through exactly this problem with a friend's 1972 Supreme. Even pulled the rear bleeder screws to verify that they were not plugged with rust. The problem ended up being rust inside the wheel cylinders that was blocking the port for the bleeder screw. I used a piece of copper wire to poke into that hole from the outside and not surprisingly lots of fluid came out. I advised him to replace the wheel cylinders, but he chose not to. You can lead a horse to water...
#8
Replace the wheel cylinders. They're under $10 each at Rock Auto.
https://www.rockauto.com/en/catalog/...+cylinder,1952
#9
That can't physically happen.
Replace the wheel cylinders. They're under $10 each at Rock Auto.
https://www.rockauto.com/en/catalog/...+cylinder,1952
Replace the wheel cylinders. They're under $10 each at Rock Auto.
https://www.rockauto.com/en/catalog/...+cylinder,1952
#11
That can't physically happen.
Replace the wheel cylinders. They're under $10 each at Rock Auto.
https://www.rockauto.com/en/catalog/...+cylinder,1952
Replace the wheel cylinders. They're under $10 each at Rock Auto.
https://www.rockauto.com/en/catalog/...+cylinder,1952
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