Author Topic: 256 Brake Post Facing  (Read 3737 times)

blueducati

256 Brake Post Facing
« on: June 23, 2015, 08:23:19 AM »
Has anyone had to have their 256 rear brake posts re-faced? I've been struggling with a weak and dragging rear brake since the beginning. I always thought it had to do with the fact that I had to cut the rear hose and re-bleed. After a dozen rear-bleed attempts and a month at a LBS (not my usual one, I tried to save the hour drive), it's still happening. I finally got a hold of someone at Magura and without hesitation, he said I probably need to have my rear brake tabs re-faced. The bike shop opens in a half hour, so I will call to see if they can do it, I just figured I'd ask here to see if anyone had to do the same.




carbonazza

Re: 256 Brake Post Facing
« Reply #1 on: June 23, 2015, 09:41:25 AM »
You should see this on the wear of the brake pad.
If the wear is regular and parallel to the metal part, it is correctly faced.

blueducati

Re: 256 Brake Post Facing
« Reply #2 on: June 23, 2015, 11:12:44 AM »
My calipers are 4 piston, and I noticed the the front two pads (one on either side) don't even touch the rotor.

carbonazza

Re: 256 Brake Post Facing
« Reply #3 on: June 23, 2015, 03:01:30 PM »
Isn't it a problem with the two front pistons not going out as far as they should?
You can check the wear on the disc too.

blueducati

Re: 256 Brake Post Facing
« Reply #4 on: July 05, 2015, 04:33:09 PM »
Just to follow up on this. I got my bike back from the shop a few days ago, they re-faced the caliper mount posts. That was definitely the issue I've been having since the very beginning. The rear brakes are now as strong as the fronts. So if you have a 256 and are having weak or dragging rear brakes, might want to check that out.

Vipassana

Re: 256 Brake Post Facing
« Reply #5 on: July 06, 2015, 04:58:39 PM »
Good to hear about the resolution.  How did they face them?

blueducati

Re: 256 Brake Post Facing
« Reply #6 on: July 07, 2015, 02:37:59 PM »
There is a specific facing tool (by Park). I think it's a $300 tool. Anyway, from what I can tell, the tool mounts in place of your rear axle, and then the cutting portion of the tool is held parallel to that, so you know you are cutting parallel to the axle, and thus perpendicular to the rotor.

RS VR6

Re: 256 Brake Post Facing
« Reply #7 on: July 07, 2015, 02:50:45 PM »
Pretty cool! I had no idea a tool like that existed...and I worked at a bike shop.


RS VR6

Re: 256 Brake Post Facing
« Reply #9 on: July 07, 2015, 07:08:27 PM »
Very handy tool for a shop to have around.  :)