Brakes

[rock yuppie]

Does anyone have any specail tricks they know about for bleeding the old style Corvette master cylinders. I ordered one for a 1968 Corvette with manual disc brakes. I had heard that they worked well for the rock buggies even if you motor shut off. I went to the park with it. I had some from brakes, but no rear brakes. By the end of the day, it had some rear brakes and no front brakes. I have bleed them by pumping them and gravity both. Today I was getting ready to load it for the Morris Mountain Shamrock run and the pedal hit the floor. I'm sure I haven't had a brain fart, but this ones whipping my butt. Any help is appreciated.

 

[Juan_Hong_Loe]

Did you bench bleed it? If not try hooking two lines to the outlets and curl the ends back into the resevoir. Fill it up where the lines are under the fluid and pump till ya see no mo bubbles. Try that then of course bleed the air out of the lines going to the calipers. But if you have already tried that...

 

[LUNCH]

you didnt cross the lines did you?? i have done that before :****:

 

[draggbody]

Did you bench bleed it? If not try hooking two lines to the outlets and curl the ends back into the resevoir. Fill it up where the lines are under the fluid and pump till ya see no mo bubbles. Try that then of course bleed the air out of the lines going to the calipers. But if you have already tried that...

x2... i bet this is your problem... it takes a while to bleed the MC itself... i prefer to gravity bleed after you bench bleed, this way you dont "foam" the fluid....

 

[John Galbreath Jr.]

The "push rod" in the vet cylinder normally has to be lengthened. You may now be getting a full stroke on her.

 

[zukiscott]

Yea man,we had to lengthen the one on tonys zuki to match the original one to get MAXIMUM PEDDLE PUSHAGE !!!.

 

[1TONZR2]

I had to do the same thing on my rig....gonna have to re-bleed the whole system since I got a new MC. I think my pedal itself is part of my problem....hoping to fix that..gonna need the extra gearing with the doubler and new axle gears...

I am going to be adding a cutting brake, so this time it will be twice as hard to bleed out. whats the best way for the cutting brakes? I have heard something about using something to push the fluid backwards toward the master cylinder from each caliper?

 

[rock yuppie]

Well i have already bench bled the MC and gravity bled the system. It's wierd, I have tried a pump to force fluid from the MC to the brakes and still not working good. I may have put the lines on backwards since it had twin MC's before. Does the front of the MC lines control the front brakes?

 

[1TONZR2]

thought it was vise versa?? **** I cant remember

 

[Willymutt]

Front controls the rear and rear controls the front on most MC's.

 

[rock yuppie]

That's probably my problem. I have them the other way (back line working rear, front lines working front). I checked the travel of the brake rod plunger and it is achieving full stroke. Gravity bled the lines again and it got some better, but it is still sliding the rear in gravel but not the front. You can hear the front calipers working slightly when mashing the pedal so the backwards lines must be the problem. See ya'll at Morris MNT mud fest (Shamrock)