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post #1 of 8 Old Feb 6th, 2010, 1:32 pm Thread Starter
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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.

Dave Selvig
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post #2 of 8 Old Feb 6th, 2010, 3:50 pm
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Re: Brake Bleeding Sequence

"yupp"
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post #3 of 8 Old Feb 6th, 2010, 4:10 pm
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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.

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post #4 of 8 Old Feb 6th, 2010, 5:28 pm Thread Starter
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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.

Dave Selvig
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post #5 of 8 Old Feb 6th, 2010, 9:45 pm
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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??
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post #6 of 8 Old Feb 6th, 2010, 10:38 pm
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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.

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post #7 of 8 Old Feb 7th, 2010, 8:05 am
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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.
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post #8 of 8 Old Feb 7th, 2010, 12:06 pm
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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.

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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