bjohnson Posted September 6, 2010 Report Share Posted September 6, 2010 Any smart ideas for removing the pistons from calipers without causing damage? I dont have a compressor so no compressed air answers and the calipers are already off the bike and 'split' ready for cleaning and replacing seals. Link to comment Share on other sites More sharing options...
V6Jon Posted September 6, 2010 Report Share Posted September 6, 2010 Had a similar problem answered recently, pop down to your local builders merchant a get a big rawl bolt to fit inside the pistons, along with a spare nut to fit the thread. Take the fixing off the bolt and spin the nut on, then replace the fixing so the thread does not protrude. Then stick the fixing in the piston and tighten the nut down. As the fixing grips just twist the whole lot out of the caliper. Simples JT Link to comment Share on other sites More sharing options...
bjohnson Posted September 6, 2010 Author Report Share Posted September 6, 2010 After scratching my head, I used a pair of plastic bicycle tyre levers and a spacer!! Different size pistons in my calipers so required two sizes of spacer to work properley. Lucky for me the pistons werent gummed up at all and came out pretty easy once I got the technique right - twist and pull! The plastic tyre levers seem to grip quite well inside the pistons but it did take several 'pulls' to get each piston out. The plastic levers were great as they didnt mark the pistons. Link to comment Share on other sites More sharing options...
Gregorious77 Posted September 7, 2010 Report Share Posted September 7, 2010 Nice one but that would not work if they really needed stripping due to corrosion. Your calipers look in very good condition already. Link to comment Share on other sites More sharing options...
bjohnson Posted September 7, 2010 Author Report Share Posted September 7, 2010 Nice one but that would not work if they really needed stripping due to corrosion. Your calipers look in very good condition already. Yes they are in good condition and didnt really ned stripping. I figured as they havent been done since the bike was new then it wouldnt hurt to strip them down and do a thorough job. My back up plan was to take the calipers to the nearest garage and try the forecourt air hose! Link to comment Share on other sites More sharing options...
DinoB Posted September 24, 2010 Report Share Posted September 24, 2010 Just by a pair of brake piston pliers .. always there then no matter what size the pistons are! Link to comment Share on other sites More sharing options...
kaighn80 Posted September 24, 2010 Report Share Posted September 24, 2010 ive use circlip pliers before and wrapped loads of electrcal tape round the 'nose' then squeeze and pull Link to comment Share on other sites More sharing options...
xjrsommsi Posted October 4, 2010 Report Share Posted October 4, 2010 ...or hydraulically? if you have a spare brake-master cylinder, and a spare (short) brake hose.....just fix it onto the caliper, fill and bleed- and push the pistons out. ***sorry, just have read, doesn´t work on already splitted calipers*** fred Link to comment Share on other sites More sharing options...
V6Jon Posted October 4, 2010 Report Share Posted October 4, 2010 Air lines and hydraulic hoses only work on the first piston, once that is gone you have no pressure. When I stripped my properly manky and neglected six pots the only thing that would shift them was rawl bolts as I mentioned above. Link to comment Share on other sites More sharing options...
Gregorious77 Posted October 4, 2010 Report Share Posted October 4, 2010 The rawl bolts idea is ace and I have used it successfully since it was mentioned on here. Link to comment Share on other sites More sharing options...
xjrsommsi Posted October 5, 2010 Report Share Posted October 5, 2010 The rawl bolts idea is ace and I have used it successfully since it was mentioned on here. ....perfect idea!!!!!!!!!!!!!!!!!!!! Link to comment Share on other sites More sharing options...
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