Binding Brakes
#1
Binding Brakes
Hi I've had to sort out the front brakes for the MOT , they failed them because they were dragging or binding( not releasing completely).
Now I've replaced all the seals and the rubber boots , lubed the pistons up with brake grease , bled the brakes and replaced all the fluid . I didn't replace the pistons 'cos they seem OK and they're really expensive , Spent a lot of time on them , but they're still not perfect , the pads still drag on the discs slightly When I pump the brakes with the caliper off the disc the pistons can be pushed back into their bores with finger pressure , so I'm assuming that's not the problem
Is this normal?
Any help please , I'm starting to get pi55ed off with this now!
Thanks.
Now I've replaced all the seals and the rubber boots , lubed the pistons up with brake grease , bled the brakes and replaced all the fluid . I didn't replace the pistons 'cos they seem OK and they're really expensive , Spent a lot of time on them , but they're still not perfect , the pads still drag on the discs slightly When I pump the brakes with the caliper off the disc the pistons can be pushed back into their bores with finger pressure , so I'm assuming that's not the problem
Is this normal?
Any help please , I'm starting to get pi55ed off with this now!
Thanks.
#2
#3
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When you say dragging ...do they still stop the wheel from spinning freely or sumthin ?
I do not know of any disc brakes, that when you spin the wheel you cant hear the pads at least still touching on the disc... its not dragging , its just a fact that the pads will still touch ever so slightly even when released..
If the pads came completely away from the discs and made a gap ...you know yourself from working on them , that they pads are sorrta just sitting in the calipers loose ....and they would rattle like chit if they were completely free and clear from the discs...
I do not know of any disc brakes, that when you spin the wheel you cant hear the pads at least still touching on the disc... its not dragging , its just a fact that the pads will still touch ever so slightly even when released..
If the pads came completely away from the discs and made a gap ...you know yourself from working on them , that they pads are sorrta just sitting in the calipers loose ....and they would rattle like chit if they were completely free and clear from the discs...
#4
I do not know of any disc brakes, that when you spin the wheel you cant hear the pads at least still touching on the disc... its not dragging , its just a fact that the pads will still touch ever so slightly even when released..
Another thing I was just thinking about is that your wheel may be SLIGHTLY misaligned. Maybe trying to more evenly torque the pinchbolts or discs could help?
However, there's a difference between dragging/binding and touching. If they were dragging bad before, but just barely touching now... you might be ok.
#8
Thanks for the input guys , it seems to be the right calliper is the culprit , freed the pistons up already and I've been dicking around with the front wheel alignment for ages . The right calliper will stop the wheel from spinning freely , though it will spin , discs are not warped .
Got to go to work this evening , this is the last chance for me to get a re-test , so I'll have to take it down as it is and hope for the best
Thanks again for all the info/suggestions , I'll let you know how it goes
Got to go to work this evening , this is the last chance for me to get a re-test , so I'll have to take it down as it is and hope for the best
Thanks again for all the info/suggestions , I'll let you know how it goes
#9
#10
For future reference - Caliper piston & seal kits arn't that expensive.
These are the ones I used for my 91 bike
http://www.bitzforbikes.co.uk/Two_Fr...9210-130-.html
and these are the ones for a CBS equipped bike
http://www.bitzforbikes.co.uk/Three_...225-130-0.html
These are the ones I used for my 91 bike
http://www.bitzforbikes.co.uk/Two_Fr...9210-130-.html
and these are the ones for a CBS equipped bike
http://www.bitzforbikes.co.uk/Three_...225-130-0.html