Ducati Monster Forum

Moto Board => Tech => Topic started by: memper on June 27, 2013, 12:23:27 PM

Title: Wheel change...now brake drag
Post by: memper on June 27, 2013, 12:23:27 PM
Changed out my bent front wheel. While maneuvering (caliper unmounted) the bike I habitually pulled the front brake. Oops.
Installed the new wheel and used the shaft of a screw driver to push back the pistons. Reinstalled the caliper, pumped up the lever again and I noticed some serious brake drag. I know there should be a little but with a gentle push the wheel does not make a full revolution.
Should I just bleed the brakes?
Title: Re: Wheel change...now brake drag
Post by: memper on June 27, 2013, 01:17:53 PM
Duh. I pushed fluid up to the res so of course the brakes are tight.
Title: Re: Wheel change...now brake drag
Post by: ducpainter on June 27, 2013, 02:29:20 PM
Quote from: memper on June 27, 2013, 01:17:53 PM
Duh. I pushed fluid up to the res so of course the brakes are tight.

When you bled it did things go back to normal?
Title: Re: Wheel change...now brake drag
Post by: memper on June 27, 2013, 04:00:35 PM
Ran out of time. Gonna give it a bleeding on Monday.
Title: Re: Wheel change...now brake drag
Post by: memper on June 29, 2013, 08:10:26 AM
Haynes manual says when removing the front axle, to only loosen the axle pinch bolts on the right leg. I did both sides.
What do the left leg pinch bolts secure?
Title: Re: Wheel change...now brake drag
Post by: Slide Panda on June 29, 2013, 08:33:42 AM
The axle... I don't know how you'd get it out without doing both sides.
Title: Re: Wheel change...now brake drag
Post by: ducpainter on June 29, 2013, 09:03:36 AM
Quote from: Slide Panda on June 29, 2013, 08:33:42 AM
The axle... I don't know how you'd get it out without doing both sides.
Not on his bike.

He has the solid axle. The pinch blots on the left leg secure the threaded sleeve that the axle threads into.
Title: Re: Wheel change...now brake drag
Post by: memper on June 29, 2013, 11:00:11 AM
Right. A threaded bushing...
The bushing itself just slides into the fork hole and becomes pinched.  Got it.
So what prevents the wheel from tracking to the right leg? I can see some of the axle between the right leg and the wheel. Am I missing a spacer of some kind?
Title: Re: Wheel change...now brake drag
Post by: ducpainter on June 29, 2013, 12:25:18 PM
Quote from: memper on June 29, 2013, 11:00:11 AM
Right. A threaded bushing...
The bushing itself just slides into the fork hole and becomes pinched.  Got it.
So what prevents the wheel from tracking to the right leg? I can see some of the axle between the right leg and the wheel. Am I missing a spacer of some kind?
The only things that space the wheel are the shoulder on the axle and the speedo drive.

The shoulder/larger diameter of the axle protrudes through the fork and contacts the inner race of the bearing.

Is that what you're seeing?

Title: Re: Wheel change...now brake drag
Post by: memper on June 29, 2013, 05:28:30 PM
Ah yes! I get it thank you.
I haven't had the chance to depressure my front brake but I was just trying to see if I fudged anything else on the install that would cause binding.
Wheel is installed fine. Im sure the binding is due to the added pressure in the brake line.
Thanks
Title: Re: Wheel change...now brake drag
Post by: uclabiker06 on June 29, 2013, 08:04:59 PM
Don't know if this will help but maybe you can try

motorcycle brake rotor/buttom cleaning (http://www.youtube.com/watch?v=nqcHw_t3QlU#)