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Yup - when I have had trouble getting the top (ribbed) seal in the caliper, every time it was because there was residue or corrosion left in the groove. I use a dull pick to scrape it out (dull so it doesn't score the caliper - see step 25 in the link below), coat the seal with ATF or brake fluid to lubricate it, then squeeze it in. When the groove is nice and clean, the seal pops in quickly with no fuss.
Yup - when I have had trouble getting the top (ribbed) seal in the caliper, every time it was because there was residue or corrosion left in the groove. I use a dull pick to scrape it out (dull so it doesn't score the caliper - see step 25 in the link below), coat the seal with ATF or brake fluid to lubricate it, then squeeze it in. When the groove is nice and clean, the seal pops in quickly with no fuss.
