The Stovebolt Site Forums The Shop Area Driveline Brake problems

I have replaced all brake shoes and wheel cyl
new master new brake lines
bled brakes and still no brakes
took to shop had brake fuild changed and brakes bled
and they adjusted the pads all the way out so they were rubbing hubs
and now my brake pedal goes all the way to floor
Still no Brakes

Sounds like you've got a leaky brake line or a hugegantic bubble in the system.

When you pump the brakes, does the pedal come back?

If not, then check your brake lines. Verify that all of your connections are tight and you don't have brake fluid leaking from a line break somewhere. Then go ahead and rebleed your brakes. You should be golden.

Jim,

Your post says they adjusted them all the way out to the point where they rubbed. How about to the point where they drag or decrease the ability of the wheel to turn?

Does the master cylinder always need fluid? How about a puddle of brake fluid on the floor?

Do you know if they replaced your fluid with DOT 3 or did somebody talk you into DOT 5? If they used DOT 5 you could need to drain the system again, replace parts, and start over with DOT 3. (It's a stretch, I know.)

Otherwise, it sounds like you have a leak. If you leave it parked for a day or so, you should see it pooling on the garage floor.

Make shure you have a little free play before the pedal starts pushing the master cyl. piston.It must come all the way back. If thats ok you still have air in the system or got a defective master cylinder. I have never used them but something like this would be a good place for the bleeders with check valves. I think they call them Speedy- bleeders.

Jim
Did you have brakes before you started? Are you running a factory setup, drums all the way around or do you have power brake with disc on the front? Did the pedal go to the floor before you took it to the shop? You could pull one of the drums off and see if the wheel cylinder moves when you step on it.

I do have factory setup drums all the way around
truck has been sitting for 1 month no fluid on tires or drive way
when I push pedal down it does come all the way back up
the fluid I'm useing is Dot 3
yes I did have brakes before I started this job
but 2 cylinders were leaking
that's why I started this job
And I have pulled off both rear wheels
and both wheel Cylinders are moving
I replaced brake lines on front
and one side on rear

Hey Jim59, check the master cylinder and see if you have fluid bypassing the cups. If you do the rear of the master cylinder will be wet right at the point where the plunger meets the master cylinder.

Also be sure the bore size of the new master is the same or larger than the bore size of the wheel cylinders. If not the wheel cylinders will be robbed of fluid before they can expand enough to make proper contact.

Hobert

If everything else checks out, you could have a defective master cylinder. These things are put together by human beings and ....., well you know the rest of the story. The wrong cup and piston would give you a lot of trouble. A defective residual valve would allow air in through the wheel cylinders when the pedal is fully released.

sounds a lot like air in the system. bleed the brakes properly, and if that is not the problem, redo the master cyl.