[joeyschribar]

i installed a lift and found out i needed to extend the brake lines for it, so i just disconnected the brake line at the T connector on my rear diff.
i then drove it out of my garage and cleaned up a bit and parked it back in the garage useing the brakes both times.

well i put the new lines on a few days later and now when i am trying to bleed the brakes, i just get a little drip of fluid and ive tried about 40 pumps with the pedal, and i do know how to properly bleed the brakes.

and the brake pedal still goes almost to the floor

my question is when i had the rear line disconnected and open, when i did use the brakes was it possible i sucked air into the lines and somehow i have to bleed the master cylender

OH yea, i also got new brake cylenders on the rear as well.
i installed them with the bleeder screw facing the top.

[XJK]

are you sure there is still break fluid in there?

-Kyle

[joeyschribar]

my fluid resivoir is filled to the tip!!
i dont know, i ran new lines thru the diff, and t-connector to the bracket on the frame

i have not bled the front brakes at all because i thought i just disconnected the rear lines so all i should bleed are the rear ones.

air does come out sometimes cause fluid does bubble.
there appear to be no kinks in the lines of any sort...
will it just take a long long time to bleed all the air out??


does the ignition key have to be in the ON position???

[Viscerebral]

key on isnt neccessary. if you are getting air, then you still got issues (like you didnt know).
still unclear. you disco'd at the t-block or the main line into t-block further up the chassis?
my last bleeding, i used a length of aquarium tubing back into the MC so i could actually see bubbles or lack of.

[1996xj]

Originally Posted by joeyschribar

my fluid resivoir is filled to the tip!!
i dont know, i ran new lines thru the diff, and t-connector to the bracket on the frame

i have not bled the front brakes at all because i thought i just disconnected the rear lines so all i should bleed are the rear ones.

air does come out sometimes cause fluid does bubble.
there appear to be no kinks in the lines of any sort...
will it just take a long long time to bleed all the air out??


does the ignition key have to be in the ON position???

I would bleed the front, its good to get out the old fluid once in a while anyways.

[blue96jeep]

you have air in your lines which is very unsafe because air is compressable and brake fluid is not, so dont drive you car, you need to bleed your brakes. start with right rear, then left rear, then front left and lastly front right. monitor the fluid in the resivor cause if it goes dry you just sucked mor air into the system.

ryan

[joeyschribar]

yea i will try re bleeding the system again then

also, when vehicle is off and i pump the brakes they get tougher but its spongy about half brake application, and then it gets really tight, does this mean my MC needs bleeding??

if so how does one go about bleed the MC, the 2 lines that connect to it i assume one is for the rear and one is for the front?
does one just press the brakes, loosen the line a little, wait for fluid, tighen the line, and then release the brakes??

[blue96jeep]

brake bleeding works best with 2 people, some 1 to press the brake pedel and the other to open the bleeder screw. you dont bleed the MC.

bleeding brakes as followes. looses bleeder screw til fluid comes out then tighten have helper press pedel 3 times and hold pedel on third time while u open bleeder screw til fluid comes out then close screw. this should be done 3times at each wheel.

[joeyschribar]

exactly, i had my girlfriend do that. she would pump the pedal a couple times, then hold it down, i release b;eeder screw, wait, a few bubbles and no fluid comes out, i close it, she releases the pedal.

i did this about 50 times, on each rear wheel, and to no avail!!!
i was thinking that when i had the lines disco'd and drove it ( dont worry, just out of the garage!!!) i might of somehow sucked air into the Master cylender, does anyone know if this is possible>??

if there is air in the MC, wont it get pushed out anyways once a bleeder screw at the wheel is loosened?
correct me if im wrong.

[blue96jeep]

yes it would but like you said some air would come out and no fluid that means their is still much air in the line. and when pressing on the pedel its 3 complete long presses on short ones. you have to stay at that wheel and do the process till u get fluid. if this doesnt work then check the lines to make sure nothing is broken or cracked and that all connections are tight to make sure nothing is sucking air in.

ryan

[joeyschribar]

lines re checked, no kinks, all tight and secure
brakes were working perfectly fine before so im ruleing out a bad mc or broken line somewhere else.
can i just try to bleed the MC, if so, which line do i loosen, i take it none of the lines on the proportioning valve need to be loosened to bleed the system or am i wrong?

[blue96jeep]

there should be not need to bleed the lines at the MC everything should be done at the wheels, if u want to u can... wait when you bleed at the wheels tell your g/f to hold the pedel down the whole time til u loosen the bleeder screw let all air the out and some fluid the tighten up the screw, then she cab release the pedel

ryan

[Viscerebral]

man unless your MC just magically pooped out on you, youve still got air in the lines. you do not need to bleed the MC unless you are installing a new, dry MC; and then, its done off vehicle (bench bleeding). start over, take your time and be thorough per ryans advice and you should be ok. double check all your fittings to ensure that you didnt cross thread and introduce an air leak. look for fluid at every joint you even touched with a tool.

[joeyschribar]

ok thanks for the info guys.

i will triple check everything tomorrow and if all else fails, i am gonna bring it into a brake shop for them to fix it up!

[carnuck]

Do you have ABS? If so, the bleeding process is MUCH tougher! Loosening the front bleeder may trip the combo valve back to center and allow fluid to the back brakes again.