no breaks ?

[donnie12]

i bought new calipers and most of the fluid drained out of the lines then i put the new calipers and tryed bleading them and no preasure is building i used two of the big bottles of break fluid idk what to do

 

[PAToyota]

What process are you using to bleed them? If you let the master cylinder go dry, you may have to bench bleed it to start out.

 

[donnie12]

pump the breaks a few times hold the pedal then open the bleed bolt then tighten it and repeat what do you mean bench bleed

 

[toy4xfun]

what do you mean two big bottles of break fluid, either you have a leak or you did not or maybe do not have an fsm, either way you will be best to get one before you pull the tools out.

 

[raydouble]

 

[toy4xfun]

well his master could be bad and that is why he is not building pressure, but he will still have to bench bleed the new one.

 

[4x4 Station Wagon]

Do you have any tension when pressing the brake pedal?

If I recall properly when I fought the lack of bench bleeding issue i had zero pedal tension. Once I bench bleed it I had pressure and just simply needed to bleed the brakes.

Wierdly and I could just be lucky I have never had to bench bleed anything other than new stuff......

 

[donnie12]

i bench bled the master 3 times now and i gravity bled the breaks there is a small amount of preasure when the truck is off but when i start it goes to the floor and theres nothing

 

[toy4xfun]

well it does not help that no one knows your general location, but you could be bleeding them wrong you could have a bad master cylinder, any how mine would not gravity bleed .

 

[4x4 Station Wagon]

i dont mean to beat a dead horse here but I dont know your background therefore I am going to ask.... When you bench bled the master did it blow your finger off the outlet/s or shoot clear across the room???

 

[2ndGenToyotaFan]

i dont mean to beat a dead horse here but I dont know your background therefore I am going to ask.... When you bench bled the master did it blow your finger off the outlet/s or shoot clear across the room???

You're supposed to use 2 hoses and run them back into the reservoir... So it just cycles until all the air is out of it.

My personal way to bleed brakes is to go get about 20 feet of clear hose from the hardware store and open a bleeder at one of the wheels, put the hose on and run it back into the master, thus you have a closed circuit. Just pump the brakes slow while you watch the bubbles in the hose so you know when you're finished.

 

[4x4 Station Wagon]

I was being lazy when I bench bled my clutch master and I took it out and cycled it until it started building pressure and called it good. Your able to move it around and untrapp air quickly. Not saying it is the right way at all however I am saying that I thought that there was a right way and a lazy way

I just reread your post..... Ok I was thinking of it different sorry! Here is my experience. I thought bench bleeding it was to basically activiate the master brakes or clutch because if you hook them up and try every other technique nothing happens because they just wont build pressure however once you get them to snap out of it with bench bleeding your good to go. I never actually bench bled anything with the intentions (and I could be totally wrong here) to get all the air out of them because unless they are the 45 degree angled down style as found in ford rangers they will normally bring the air back up out of the reservoir????? Am I mistaken on the bench bleeding theory or am I just a messy bench bleeder??

 

[toy4xfun]

you are mistaken on the bench bleed thing, the purpose to bench bleeding is to get all the air out, if you do not use the tubing back to the reservoir then it will just suck air back in, when you release the plunger.

 

[missouriman]

get a 60 cc syringe with the screw end.
some vacuum hose
a finger full of grease

fill res to the top.
put finger full of grease around the bleeder screw
put wrench on bleeder screw
put vacumm hose on bleeder screw
connect syringe to vacuum hose
loosen bleeder screw
pull 60 cc of brake fluid out.
close screw
put 60 cc of brake fluid in master
pull anouther 60cc through.

each wheel that should do it.
on and the proportioning valve.

make sure rear brakes are adjusted with the adjuster wheel.

gravity bleeding will leave air in the high spots of your lines.

oh when using the syringe you just open the bleeder far enough to get the fluid to pull through. the grease helps keep air from bleeding around the bleeding screw.

I also have made a top for my res with a small fitting and hooked a pumped up (just a few pumps) garden sprayer to it and power bled them that way also.

i really need to buy a power bleeder some day.

 

[GRM]

By any chance, did you swap the calipers from a different model? What truck do you have? What calipers did you buy.

Your symptoms sound like you put 92+ brake calipers on a 79-86 truck