Disc Brakes

FarmTrk · Post by **FarmTrk** » February 26, 2007, 9:46 pm

Hey guys I am in the final stages of doing a disc brake upgrade. Everything has been going fine until I tried to bleed the brakes. AS I usually do I started at the wheel furthest from the master cylinder. However, I could not get an fliud to that wheel. I backtracked to the porpotioning valve and found nothing coming from the rear wheel line. After removing the line I can get fluid but after hooking it back up again still can't get. I have checked and blown out all the lines to no avail. I am kind of at wet end. I thought I would start over and plugged the front brake outlet at the master cylinder and I still have a hard pedal but no fluid to the back brakes. Anybody have this problem or have any suggestions.

ICEMAN6166 · Post by **ICEMAN6166** » February 26, 2007, 10:15 pm

pedal/ booster rod too long?

Slick Fan · Post by **Slick Fan** » February 27, 2007, 11:39 am

ICEMAN6166 wrote:pedal/ booster rod too long?

Yeah, what Ice said. Did you have to push the pedal rod in, in order to slip the bolt through? Did you have to physically push the master cylinder onto the booster, to get the nuts on?

ICEMAN6166 · Post by **ICEMAN6166** » February 27, 2007, 12:37 pm

i had that problem many years ago, took 3 mcs back to the store because i could not get them to work.just happened to be a mechanic in the store, we got to talking, he came and looked and put some washers between the mc and firewall and then it worked and he hired me to work for him.funny thing was, i could get fluid out with the lines off and he said that if the piston was pushed in too far ,fluid would come out as the piston passed by but not after a certain point in travel.

FarmTrk · Post by **FarmTrk** » February 27, 2007, 5:58 pm

Thanks for all the tips guys. Tried them all and still no luck. I guess the next step is to replace the propotioning valve and they are costly but, hey got to fix it.

norville · Post by **norville** » February 28, 2007, 8:30 am

did you crank up the rear shoes. Till the wheels stop moving?

bob

After the shoes are tight , crack the valves open and pop the top on the master and let them gravity bleed.

MadMaxetc · Post by **MadMaxetc** » February 28, 2007, 10:42 pm

The Prop valve has no moving parts (so it realy can't go bad) so I would give it a good soak in some solvent, or even a bunch of brake fluid. Keep trying to blow it out too. I bet there is some gummy old stuff in there blocking things up.

I would get 1 or 2 from a scrap yard, they should be cheep, just in case you can't get it un pluged.

DV65CustomCab · Post by **DV65CustomCab** » March 1, 2007, 7:00 am

Or if you decide to go new, just buy an adjustable one like Wilwood makes, they aren't that expensive. Pegasus racing parts sells them, among others.