Originally Posted by scott122262
Ok guys I need some HELP! I canít seem to get all the air out of my front brakes, Hereís the story. I changed the front tire thus removed the calipers, and two days later I put every thing back together including new pads. Yep you guessed it, all the brake fluid drained out. Well no big deal I thought to myself. I started to bleed the brakes thru the left caliper then the right till no air bubbles. Tested it and I could pull the brake lever to the bar with little effort. Thought about it for a minute and remember the ABS unit, Sh--!. Ok so now I bleed the whole system again starting with the ABS unit then the calipers. I still can pull the lever to the bar, it takes more effort then before but not good enough. As I started the process again I got a fair amount of air bubbles coming out of the ABS unit. I gave up for the night after pumping a pint of fluid thru it, and still not getting the right feel of the brakes. I also thought that letting it set over night that all the air would rise up to the top by the bleeder. Next day I started again from the ABS and sure enough big air bubbles. Thinking I got it licked I finish up and I STILL can pull the lever to the bar, but I can pump it up to the point that I canít pull it to the bar and hold it, thus no leaks and the master cylinder is ok. (I think?) But after letting it sit for a few minutes I still can get air bubbles out of the ABS unit and none out of the calipers. Again after pumping another pint through.
PLEASE TELL ME WHAT I AM MISSING! This is driving me NUTS!
The Conditions: I have bleed many motorcycle brake systems before, So I know how to do it. Although this is the first time with ABS.
Did them the old fashion way, by hand using speed bleeders.
The temp. in garage was 40 f. as was the brake fluid.
Used Dot 4 fluid.
Kept fluid in the reserve.
Good news, the situation you are in is exactly where I found myself a few weeks ago. There is an article in the Hall of Wisdom posted by John Meese. John was good enough to even take a call from me in my hour of need. I may have doubted if I would ever get the BigK back together, but with Johns help, I did.
The secret in this situation is to know 1), the fluid is being pulled from the rear resovoir bottles and 2), you gotta uses the power pumps to push it through. This means that little 1/2 or even 1 litre bottles are no use to you, when that pump starts pumping fluid, it really drinks it, so you need two to four litres of fluid. They to get rid of the old stuff initially and then perhaps you can recycle the new fluid while you bleed it, finally you could then flush it with completely fresh fluid.
You need to attached the hoses, like John shows to the bleed pipes on the top of the two master cylinders. Do not forget to bleed both sides of the rear caliper. If you take is slowly, and easy, you will finish it in a day.
Finally, after I rode my bike for a week or so, the brake warning lights came on, I topped up the two little bottes today so hopefully that is it.
To be honest, if I was back there again, I would ask a dealer to do it. I imagine that they can hook it up to a machine and it will cycle the various sections of the system in the correct sequence. However for me, it is working now.
Best of luck, look carefully at John Meese's article, everything you need is in there.
Mark in Ireland.