Hi all,
I am using Shimano SLX brakes, probably 2011, but definitely recent. They have only about 15-20 hours' use.
I was having a nice 20-minute, fairly bumpy descent today and was just about at the bottom when I pulled on the brakes and the rear brake lever went right down to the grip with zero braking power. Disconcerting. But fortunately I was able to stop with just the front brake.
Being a newbie and somewhat confused, I thought I might try pumping the lever to fix it. After a moment, the lever was stuck at full distance away from the grip. And when I rode, the pads (or something - pistons? - is that possible? see below) were constantly rubbing on the rotor. I rode the bike slowly to some public transport and got home that way.
Now, I've taken the rear wheel off, turned the bike upside down, scratched my head a bit, read some books, drunk a beer, compared the front and rear brakes and then started wondering why it looked like the rear brake pads weren't in the right place.
Finally, I noticed that the split (or fixing) pin for the rear brake is totally missing. When I look at the one on the front brake, it's slotted through the brake pad holes and then bent over the side, so that it is very hard to imagine it working loose. And, as mentioned, the brake pads then seem to be sticking well out of their expected location.
My question then... what might have happened here? Is it ever the case that a properly fitted split pin can work loose, and then the brake pads get jarred out of place, resulting in total brake failure?
Or could the LBS possibly have just forgot to put it in?
(I'd like to know before I storm into the LBS looking miffed.)
Second question - let's say I find a replacement pin and look to put everything back in place, is there anything else I might have damaged in this incident that I need to look at or replace?
Thanks! :thumbsup:
I am using Shimano SLX brakes, probably 2011, but definitely recent. They have only about 15-20 hours' use.
I was having a nice 20-minute, fairly bumpy descent today and was just about at the bottom when I pulled on the brakes and the rear brake lever went right down to the grip with zero braking power. Disconcerting. But fortunately I was able to stop with just the front brake.
Being a newbie and somewhat confused, I thought I might try pumping the lever to fix it. After a moment, the lever was stuck at full distance away from the grip. And when I rode, the pads (or something - pistons? - is that possible? see below) were constantly rubbing on the rotor. I rode the bike slowly to some public transport and got home that way.
Now, I've taken the rear wheel off, turned the bike upside down, scratched my head a bit, read some books, drunk a beer, compared the front and rear brakes and then started wondering why it looked like the rear brake pads weren't in the right place.
Finally, I noticed that the split (or fixing) pin for the rear brake is totally missing. When I look at the one on the front brake, it's slotted through the brake pad holes and then bent over the side, so that it is very hard to imagine it working loose. And, as mentioned, the brake pads then seem to be sticking well out of their expected location.
My question then... what might have happened here? Is it ever the case that a properly fitted split pin can work loose, and then the brake pads get jarred out of place, resulting in total brake failure?
Or could the LBS possibly have just forgot to put it in?
(I'd like to know before I storm into the LBS looking miffed.)
Second question - let's say I find a replacement pin and look to put everything back in place, is there anything else I might have damaged in this incident that I need to look at or replace?
Thanks! :thumbsup: