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  Topic Review (Newest First)
Feb 7th, 2010 12:06 pm
jzeiler
Re: Brake Bleeding Sequence

The early ABS bleed ports are just a high point bleed area. No need to touch them during a flush but I would if the rear line was off. They are at the top of a small chamber that gets modulated in volume by an electromechanical piston during ABS activation. I say again small chamber but if it has air in it your rear brakes will suffer in performance. All the fluid from the reservoir goes through the ABS and out the rear caliper bleed port.This is quite different from the later linked and power assisted ABS.
Feb 7th, 2010 8:05 am
hwread
Re: Brake Bleeding Sequence

I'm not worried about getting the ABS flushed as it was done less than a year ago. All I'm after is Improving the nearly useless rear brake. Think I'll give it a try.
Feb 6th, 2010 10:38 pm
Lee510
Re: Brake Bleeding Sequence

The manual says you don't need to bleed the ABS unit unless the system has been drained. Removing the brake line may cause the level in the ABS unit to drop. For my own piece of mind, I'd push some out of the rear nipple. Maybe even the front, while I was doing it. Our ABS units sometime fail and I think it's due to not getting the old fluid out of the ABS unit when flushing the system. I read here somewhere that flushing from reservior to caliper moves fluid but may not move it all out of the ABS unit.
Feb 6th, 2010 9:45 pm
hwread
Re: Brake Bleeding Sequence

Similar but different question: If I replace the rear brake hose on a 2000, can I just bleed through the caliper with my Mity-vac and leave the ABS alone??
Feb 6th, 2010 5:28 pm
saddleman
Re: Brake Bleeding Sequence

Thanks guys: I just finished & ran a quart of new dot 4 thru the system. No leaks & the pedal & hand lever feel good. I did have to bleed the calipers a little to get some pressure to finish bleeding the ABS unit. I'm now about halfway down my list of to do things on my Black Beauty.
Feb 6th, 2010 4:10 pm
jzeiler
Re: Brake Bleeding Sequence

Yes Dave, key off bleed the control circuits until the lever and pedal are firm. Then re-fill the rear two chambered reservoir and run some "powered " fluid through to the wheel circuits. Kind of neat to run a hose from the bleeder back to the reservoir and pump until the bubbles are gone in the hose.
Feb 6th, 2010 3:50 pm
cfell
Re: Brake Bleeding Sequence

"yupp"
Feb 6th, 2010 1:32 pm
saddleman
Brake Bleeding Sequence

I am installing new Speigler brake lines. I'm thinking that I should bleed the ABS system first & then do the power bleed on the calipers.

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