85 brake issue

[uglyryde]

i have an 85 2wd short bed...the problem that i have is that my brake pedal travels all of the way to the floor before the brakes catch. i have replaced the rear wheel cylinders, front calipers, soft brake lines, master cylinder, brake booster, front pads and rear shoes.the problems still exists. any help would be appreciated as this is my daily driver.

 

[martin]

Did you adjust the rear brakes after you changed the linings?

 

[uglyryde]

yep....adjusted the rears

 

[uglyryde]

i also made sure to bleed them all the way around...starting from the further most brake

 

[uglyryde]

this id my daily driver, any help will be appreciated........

 

[JoshT]

I'm inclined to think that you still have air trapped in the system.

Did you replace the rotor or have it machined when you did the pads? If machined it could be possible that they are too thin.

 

[uglyryde]

everything is new......

 

[TimR]

does the brake pedal come back all the way to the top? Sounds like the wrong master, or brake rod length.

 

[uglyryde]

yep...it comes all of the way back up.....i thought it was the master too....replaced it 2 days ago...exact same thing happens as before

 

[TimR]

ok, next question, did you compare wheel cylinder diameters between the old and new ones? Some applications have different sizes, and a larger bore would change the amount of fluid needed to achieve the same braking effort.

 

[uglyryde]

i will look at my old ones and let ya know

 

[uglyryde]

old and new are both 13/16 " bore

 

[TimR]

do they ever pump up? or just go to floor every time?

 

[uglyryde]

never pumps up...always goes to the floor

 

[Sasquatch_Ryda]

was the master properly bench bled?