I put my new pads and lever blade on today and set the pads up, but when I pull the brake one of the pads is normal and goes in and out but one goes in and doesn't come out very far. I thought that it could be because I have an air buble in the cross over section, because the pad that does not come back out changes every now and then. So maybe it just needs bleeding as it hasn't been bled in about a year. Help would be much apreciated, thanks, Elliott.