Problem bleeding new brake system

[KF100TK]

I installed a new power disk brake system and tried bleeding brakes but i am not getting any fluid coming out of the bleeder screw? I bench bleed the master first and i do have fluid to the caliper because it leaks slightly @ flex hose to caliper connection. When i pump the brake pedal it pushes with a little pressure (no power to booster i would assume) but does not return? What gives? Note everything is new(master power kit).

[fordman]

it could be a clogged bleeder or clogged caliper. it could have gotten some old junk from the old lines into it and clogged it up. you can try to bleed just the rubber hose st the caliper or the nearest point you can break the lines loose at. then close that up and open the bleeder. and stand on the brake pedal until it gives. if you have to remove the bleed screw completely.

[rjewkes]

couldalso be a collapsed line too.

[heep70]

The brake pedal does not return to it's origonal position? I would say the MC might is bad.

Are all the parts installed? Like the push rod from the booster to the MC? Is it adjusted properly?

Is the pushrod from the pedal to the booster the right one?

[KF100TK]

Thanks for the replies, the brake lines are new as well. Master cylinder is new. The lines were cracked at the calipers fluid drips through gravity, bleeder screw was removed pumped pedal several times no fluid out of bleeder.I think i installed the booster and pedal correctly, the pedal moves full stroke if i pull it bake by hand. What gives?

[fordman]

it could be a bad master like heep said. or the caliper is bad and not letting the fluid in so it cant push the brake pedal back up.

[KF100TK]

Heres some pictures of the situation.
http://s302.photobucket.com/albums/nn90 ... G_0607.jpg
http://s302.photobucket.com/albums/nn90 ... G_0606.jpg
http://s302.photobucket.com/albums/nn90 ... G_0605.jpg
http://s302.photobucket.com/albums/nn90 ... G_0604.jpg
http://s302.photobucket.com/albums/nn90 ... G_0603.jpg

[fordman]

edit: i finally seen all the pics i cant see anything wrong. what is that red stuff you used as paint on the brake stuff?

[heep70]

Could be the picture, but is the push rod from the pedal to the booster at some weird angle?

What size calipers did you use?

Still stock drums in the back?

What size bore does the MC have?

[KF100TK]

I think it was just an enamel that the paint supplier made up with hardener thats why it peeled on the caliper when it leaked.

[KF100TK]

Hey Greg, push rod was different than stock because it was forked but seemed to line up ok. In the kit i bought from blue oval they gave 2 different lenghts of push rods (1 was to short & the other to long,i cut the long one to work). Caliper looks like a stock one, the rear are still drums for now the master and proportioning valve are future rear disks.The bore i don't know but booster/MC came preassembled.

[heep70]

I sure would take another look at the booster to MC push rod agian. At least take the MC off, but leave the plumbing attached. See if you can hand push the plunger in the MC. See if will return all the way back. If you can hand operate the MC then try a bench bleed again to make sure the plunger returns.

Also if you can control the mess try push the pedal with the brake lines detached. See if the pedal return. I guess this is a process of ilimintion tell you can find it. Good luck


That MC looks like a 1 ton MC. The bore is 1 5/16". If you plan on doing rear disks then that will match up good.

[KF100TK]

When i originally bench bled the MC the piston sprung back good. I'll separate the MC from the booster to see if i did something wrong. Thanks for your help Greg!