29-10-17, 06:49 PM
(29-10-17, 02:24 PM)celticbiker link Wrote: For stuck caliper pistons I use duck oil and a G clamp.
Give it a good clean with duck oil and a rag then gently and slowly clamp back into place, remove clamp and pump piston or about 75% and repeat until smooth and free.
When happy push the piston in and clean with brake cleaner. Finally apply a smear of red rubber grease to the piston.
I have specified duck oil for this as it is safe for use on the seals. Do not use wd40 it will destroy them.
Any mineral based oil or grease will perish the seal or any other rubber parts, I have heard of guys using Cooper Slip/Ease on their brake Pistons/Pots, again the kiss of death to the seals.
Red Rubber Grease or a Silicon Grease will stand you in good stead, there may be others but Red Rubber grease is always my choice, I used it on the needle bearing on my suspension linkage as well, just because it is waterproof and will not get washed off or slowly dissolved in a wet area link the linkage that take a battering from spray.
https://www.ebay.co.uk/itm/Granville-Red...SwRgJXkM3r
or alternatively this will last a life time
http://www.ebay.co.uk/itm/Granville-0846...0506.m3226