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Old Jun 13th 2017, 05:28 AM   #1
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No pressure in rear brake

Replaced brake fluid. Now there is no pressure. Any help would be appreciated.

Bike - 2013 Ducati Panagale S 1199
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Old Jun 13th 2017, 05:46 AM   #2
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you have an air bubble in the line. the rear caliper is upside down. if you leave the caliper where it is you will never get the air out.
when you change rear break fluid you have to undo the caliper hold it right side up. do the change put it back. problem will be fixed somewhere on this forum there is a how to.
below is about changing rear break pads. check out the bolded part this is why yours isnt working


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Last edited by mark419ny; Jun 13th 2017 at 05:51 AM.
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Old Jun 13th 2017, 05:50 AM   #3
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So - after all that - it turns out the pads were just fine. Clean with plenty of compound left.
Regardless, what did I learn?
You do not need to remove the rear wheel; but it is much easier to get at things if you do. For example, getting a torque wrench in there to put everything back to spec.
Cut off the zip tie that holds the hydraulic line of the caliper to the line going to the ABS before you remove the caliper. (Don't forget to refit another one when you are done.)
If you do need to change the pads, clean the pistons and internals of the caliper with warm, soapy water before you push them back to get the new pads in. Also, use a vacuum pump to suck the old fluid out of the reservoir before you push the pistons back in place; then refill and bleed the system, (might as well change the fluid).
Bleed the brake line (and continue to refill the reservoir with new hydraulic fluid) while the caliper is off and upside down. It is far easier to get any and all air out this way. (Thanks Anti-Hero)
While the bolts are out, you might as well drill the caliper bolts for safety wire. A 1/16th bit works best; but you might as well have a few on hand because they can break rather easily. Use a lubricant on the bit; I used copper slip grease. Drill right through the bolt head, so that there are two holes, 180 degrees apart (opposite). This allows you to wire the hole that creates tension on the wire/bolts in the direction that prevents them from loosening.
Clean the caliper bolt and use copper-slip grease when putting it all back together. When tightening, tighten one bolt a little bit and then the other, progressively getting them up to spec.
Oh, and one last thing, if you have enough beer, you might as well drill the front caliper bolts while you're at it.
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Old Jun 13th 2017, 10:20 AM   #4
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The issue has been resolved. The break caliber has to come off and the bleeder must be pointing up.
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Old Jun 13th 2017, 10:59 AM   #5
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thanks thats what i said in my first 2 posts
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Old Jun 13th 2017, 12:38 PM   #6
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Thanks mark419ny!
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Old Jun 13th 2017, 12:59 PM   #7
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hopefully you found the right way to do it way faster than i did lol
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Old Jun 13th 2017, 02:56 PM   #8
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I had to make a home depot run to get a 3/8 to 6mm hex socket. After that it took literally 10 minutes total time. A couple of squirts out of the bleeder and I was done.
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