Kevinfor Posted March 17, 2013 Report Share Posted March 17, 2013 Hello. I have had some problems with my front echo tr disk brake getting contaminated all the time, I thought it might be leaking or something, but after changing to an old onza cable disk from my old 2010 blade I have now managed to get that one contaminated as well! What am I doing wrong? I'm not touching the pads or disk with greasy hands and I havent used the onza brake in wet weather yet. Any help much appreciated! Kevin. Quote Link to comment Share on other sites More sharing options...
bing Posted March 17, 2013 Report Share Posted March 17, 2013 (edited) Have you cleaned the disk in between changing the calipers? If not the oil will be ingrained into the disk surface, and it will need cleaning/burning off,or the oil that is on the disk will contaminate the pads in the new caliper, and wreck those as well, which is what sounds like has happened. Only solution is new pads, and maybe a new disk Edited March 17, 2013 by bing Quote Link to comment Share on other sites More sharing options...
SamKidney Posted March 17, 2013 Report Share Posted March 17, 2013 Just clean both the pads and the disc. No need for new pads/disc until you've given this a go. Disc in the dish washer, pads in the over @ 200* for 10 minutes to boil the oil out of them. Run a file over them (when they're cool) to remove the top surface, and go round the disc with some wet and dry paper. Re-set and bed in using cold clean water and dragging the brake. I do this by braking as hard as I can while pedalling at a normal pace for 5 seconds, then off for 5, on for 5 etc... pouring more water over it intermittently. Worked for me on both my mono trials, and they had direct contact with dot fluid after my hoses split. Quote Link to comment Share on other sites More sharing options...
Kevinfor Posted March 17, 2013 Author Report Share Posted March 17, 2013 I've already tried cleaning the pads and rotor. This is what whats been going on: first it was echo tr complete brake with an echo rotor, then I cleaned the pads and rotor the way you said, sam, then I changed the rotor to the onza one, that didnt work either, so I changed the brake as well, that worked quite well but after todays ride it started to feel contaminated again. Is there any way of getting the brake contaminated by simply pumping it, as in braking, releasing and breaking again while rolling? I dont remember having any problems with the brake when I was still riding the onza. Quote Link to comment Share on other sites More sharing options...
dezmtber Posted March 17, 2013 Report Share Posted March 17, 2013 Some times deisel cars can contaminate the brake when its on the bike rack. Quote Link to comment Share on other sites More sharing options...
Kevinfor Posted March 17, 2013 Author Report Share Posted March 17, 2013 Some times deisel cars can contaminate the brake when its on the bike rack. Yeah I was thinking air pollution might be to blame. I just chuck the bike in the back as I have a big car though. Quote Link to comment Share on other sites More sharing options...
dezmtber Posted March 17, 2013 Report Share Posted March 17, 2013 What cleaners and oils do you use ? Quote Link to comment Share on other sites More sharing options...
Kevinfor Posted March 18, 2013 Author Report Share Posted March 18, 2013 I've tried cleaning it with acetone, thinner and I think I used Isopropyl alcohol and also the stuff you wash the dishes with. As for oils I have no idea? I havent changed anything so it should be the oil the echo tr brakes come with. Quote Link to comment Share on other sites More sharing options...
dezmtber Posted March 18, 2013 Report Share Posted March 18, 2013 To clean I use electrical contact cleaner or isopropal. And water. Thinners or white sport will ruin your brake pads. If you have used it you will need new pads. No a amount of cleaning will clear the penetrating oil Quote Link to comment Share on other sites More sharing options...
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