Powered by Outside

SRAM db5 brake fix

PB Forum :: Mechanics' Lounge
SRAM db5 brake fix

 Post Message | Latest Comment
Author Message
flag JayAdders
Posted: May 14, 2016 at 2:58 Quote
I need help with my brakes. The levers have no tension in them, I can squeeze them to the handle bar. I've tried bleeding the brakes and burped the the brakes but still can't get them to be sharp as they 1st were. Could it be I need some new pads? Can anybody shine any light on this matter please
flag rileyager
O+
Posted: May 14, 2016 at 21:52 Quote
You probably didnt bleed the brakes properly so the whole system probably has loads of air in it.
You need to make sure that when you bleed sram brakes, you degas the fluid in the syringe to help avoiding putting more air into the system. You also need to be very persistent when bleeding both the caliper and the lever as it may take some time to remove all of the air out of the system. Lastly, when you finish bleeding the lever, which should be the last part of your bleed, you need to pressurize the system by pushing extra fluid into the lever before removing the syringe.
I bled a set of brakes today where the mechanic who had worked on them previously had probably forgotten to do most of those steps so the brakes hardly worked. When I was done with the brakes, they felt just like new. As long as you follow srams bleed procedure step by step, then you shouldnt have any issues.
They have a video on how to bleed their brakes on their youtube channel which outlines all of the steps necessary to bleed the brakes properly.
And new pads wont help the situation unless your pads are ground down to the metal.


hope this helps
flag JayAdders
Posted: May 15, 2016 at 5:08 Quote
bowbikebuilder wrote:
You probably didnt bleed the brakes properly so the whole system probably has loads of air in it.
You need to make sure that when you bleed sram brakes, you degas the fluid in the syringe to help avoiding putting more air into the system. You also need to be very persistent when bleeding both the caliper and the lever as it may take some time to remove all of the air out of the system. Lastly, when you finish bleeding the lever, which should be the last part of your bleed, you need to pressurize the system by pushing extra fluid into the lever before removing the syringe.
I bled a set of brakes today where the mechanic who had worked on them previously had probably forgotten to do most of those steps so the brakes hardly worked. When I was done with the brakes, they felt just like new. As long as you follow srams bleed procedure step by step, then you shouldnt have any issues.
They have a video on how to bleed their brakes on their youtube channel which outlines all of the steps necessary to bleed the brakes properly.
And new pads wont help the situation unless your pads are ground down to the metal.


hope this helps
flag JayAdders
Posted: May 15, 2016 at 5:13 Quote
Thanks for the reply. I've watched the video and done numerous bleeds. There's obviously air still in the system and I guess it's a case of persistence till I get it right. On my 1st attempt I got fluid on the pads but have cleaned them since, I don't need new pads do I?

Thanks
James
flag rileyager
O+
Posted: May 15, 2016 at 9:10 Quote
Whether you need new pads or not depends on how contaminated your current pads are. If they were fully saturated with fluid then you might need new pads because no amount of sanding will take away the contaminated surface.
And I would spend at least 15-20 minutes on each brake trying to suck as much air out of the system as you can.
flag JayAdders
Posted: May 16, 2016 at 2:49 Quote
Thanks for the feedback, much appreciated
flag cmcrawfo
Posted: May 16, 2016 at 3:32 Quote
you can boil your pads, that should remove the contaminants.... I would use a pot that you don't eat out of.

Just follow the online video tutorial from sram and you should be fine. Following proper procedure with properly degassed fluid will remove the air.
  • Previous Page
  • Next Page

 


Copyright © 2000 - 2026. Pinkbike.com. All rights reserved.
dv65 0.007442
Mobile Version of Website