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Back wheel locked...wth?

  • Thread starter Thread starter BIG_brother
  • Start date Start date
seems like he ran something without oil/grease whatever...
why are we talking about brakes?
what did i miss?
i am so cornfused????`?~?`/~/~?~?~??~
 
so what is wrong with micks bike?
he called the other day and i told him that i have little to no experience with the shaft scene.
 
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blowerbike said:
why are we talking about brakes?
what did i miss?
Click to expand...
We are generally discussing the fact that his rear wheel locked up.

We then progressed to some of the common causes of rear wheel lock-up.

One of the reasons could be lack of lubrication in the driveline, specifically the secondary drive (the front sprocket area on a chain-drive bike).

Another reason (which could happen on any bike) is that the compensation port in the master cylinder is blocked, not allowing fluid transfer.

As I mentioned in post #16, if that port is not open, the only place for expanding fluid to go is behind the pistons, pushing on the pads, locking up the rear wheel.

Did you follow this time?
icon_shrug.gif
:-\\\

.
 
yes but i would have thought he would have popped off the caliper to see if the wheel would then turn.
 
blowerbike said:
yes but i would have thought he would have popped off the caliper to see if the wheel would then turn.
Click to expand...
Yeah, you would have thought that and I would have thought that, but he evidently doesn't know to check that.
You can also just loosen the bleeder nipple to release any pressure that has built up.

As tkent asked, "what was hot?". That is most-likely where the problem lies. :-\\\

.
 
Steve said:
But did you rebuild the master cylinder? :-k

Even more important, did you clean out the compensation port (which can be done without rebuilding the master)?
icon_shrug.gif


If that compensation port is plugged, it will not allow fluid from the caliper to bleed back into the reservoir as it gets heated from the friction of the pads rubbing on the disk. Since the fluid is expanding and can't get into the reservoir, the only place it can expand is to push on the pads, which can lock up the wheel.

.
Click to expand...

Yes... you did it for me remember?
 
No rear wheel is off the bike shaft is out... secondary is prob trash... Ill post soon
 
blowerbike said:
does steve know you under this nick-mick?
Click to expand...
Yes, I do. (I even see him at work, occasionally. :eek: )

And yes, I cleaned the master cylinder.

I have worked on more than one bike since then and I have slept since then.

"Memory" is such a wonderful concept, I wish I could remember how to use it. :-k

.
 
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