IVC434 65 Posted May 25, 2021 Hello all.  I'm still slowly getting through the work on my XC.  I've removed the original front PBR calipers and given them a thorough clean up, but I'm thinking about getting them professionally refurbished by a brake expert instead...  Thoughts please? Share this post Link to post Share on other sites
gerg 10,871 Posted May 25, 2021 Unless there's pitting or chrome peeling on the piston seal surface or in the groove where the seal goes, there's not much to worry about. A bit of soft scotchbrite will bring up all the important areas. Just a tube of rubber grease for assembly and you're there.Sent from my CPH1920 using Tapatalk 2 bear351c and IVC434 reacted to this Share this post Link to post Share on other sites
bear351c 10,270 Posted May 25, 2021 Agree. Unless you can see rust or pitting on the piston, clean it up and reuse it, new seal kit, lots of rubber grease. (it's castor oil based, IIRC, so it dilutes with brake fluid. Normal grease won't). Twist the piston in one hand, with the scotchbrite in the other hand. Dont rub up and down the surface, go around the circumference, if that makes sense. Don't make little tiny grooves for the fluid to get past the seal. 2 gerg and IVC434 reacted to this Share this post Link to post Share on other sites
