Quote:
Originally Posted by
Hamslay
After a 3 minute ride round the block with a bit of braking, the disc was almost too hot to touch. I don't know if this is normal, or whether it's indicative of the pistons not retracting properly and keeping light pressure on the disc. Maybe this is what glazes the pads?
Should I be able to move the pistons by hand without a screwdriver or pliers? How do I know if they're a bit sticky?
|
If the discs are too hot to touch after a short ride, then the pads are binding on the discs. This could be the pistons, but could equally be the caliper sliding pins being stuck as I mentioned earlier. It will also, as you say, end up glazing the pads.
You really need to take the caliper off and try and get some movement back into the sliding part of the caliper. You can try lubricating the sliding pins and working the two parts of the caliper back and forth, but you may need to strip it to clean everything up.
It is possible to move the pistons back by hand, but not all that easy. generally lever them back, but they shouldn't take excessive force. Check that the reservoir isn't full to the brim though because the fluid needs space to get back in there. If it's brimmed that pistons won't push back because they'll be nowhere for the fluid to go.