Topic: back brake drags

[DJ_AX]

750 k5 ...
After the bike sits for a day or so, I warm it up and start riding. I always do a handling check before I get to the main roads (swerve, bounce, and brake)
When I go heavy on the back brakes, they stay locked up for a few seconds after releasing. This is always a little disconcerting as I feel like I'm thrown forward a bit while expecting to start rolling again. Anyway ... after a few miles it doesn't drag like that anymore.

I haven't looked at it yet but I'm about to pull apart the rear end and fix up some things back there (including this prob.) But before I do I was just wondering if this is simply something to adjust? Or is it an indication that I may need more parts than pads back there?

I've already adjusted everything externally to no avail.

[gerhed]

Have a similar problem with my bike but it's an F.
Like you, though, I would like to fix it without taking it apart.
I'm dreaming, of course.

[Gordon]

If it hangs up and then releases, it's most likely not an adjustment problem.  If it were only adjusted too tight it would rub constantly, eventually heating up to the point that it would lock up until allowed to cool down again. 

You'll have to open it up and take a look, and make sure to check everything from the pedal pivot all the way back to the brake shoes themselves.  There's a good chance the problem is with the part that rotates and forces the brake shoes outward toward the hub.  This can get corroded and encrusted with brake dust to the point that it doesn't rotate smoothly.

[DJ_AX]

... corroded and encrusted with brake dust to the point that it doesn't rotate smoothly.

That's what I was thinking ...
Thanks G.
Probably be a week till I get a chance to look at it.. I'll let you know what I find gerhed.

[Jinxracing]

Is it possible for the brake actuator cam between the two shoes to "over rotate" due to extreme pad wear? If it could, I can see how that would cause the brake shoes not to retract...

[mrblasty]

Is it possible for the brake actuator cam between the two shoes to "over rotate" due to extreme pad wear? If it could, I can see how that would cause the brake shoes not to retract...

Ditto to that, I also use a small dab of high temp silicon grease on the the cam after al has been cleaned, this is something I do about once a year.