I do not loosen the resrv. cover unless I am draining the old fluid and replacing with new.My question was whether or not you guys remove or loosen the reservoir cover before pushing in the pistons, i get everything but an answer too what I asked.
In the past i've always pushed in on the caliper which partially pushed in the pistons, they i took a scraper with a long thin blade on it and used it to protect the Disc and got in between that and the old brake pad with a large screw driver to pry the pistons all the way in. Sounds like a lot of steps, but its easy.
I wanted to improve my process though, so i thought removing or loosening the cover would relieve any pressure and the pistons would easily go in, rather that have to pry. I have always been hesitant to ty it for fear of a making a mess. Hence my question.
I push the piston in by hand as well, then finish with a c-clamp (old pad to protect the piston).