squince Posted November 26, 2005 Report Share Posted November 26, 2005 right..First of all could you give a full run through o how to bleed a hope brake and... ive put the top cap on the front of the lever and when i press the brake liquid seeps out the sides a bit :'( Is this because i just filled it to the brim and put the top cap striahgt on? cheers andy Quote Link to comment Share on other sites More sharing options...
nmt_oli Posted November 26, 2005 Report Share Posted November 26, 2005 (edited) Ok, you probably just didn’t put the top cap/diaphragm on properly, this causes seeping. To bleed a hope brake: Tools required: 8mm ring spanner 4mm allen key for lever 2mm (I think) allen key for top cap bolts 3mm allen key Plastic tubing An old bottle Some tape DOT 5.1 fluid Copper grease A rag Dust sheet /big rag What to do: *Put the bike in a convenient place to work on it, ie bike stand or somewhere it’s not going to get knocked. *Remove the wheel and pads from the calliper to prevent contamination from leaks. Push pistons ‘home’ into calliper using tyre lever or a spanner *Put dust sheet / rag under the bike where your working to catch drips *Set up brake lever so the top of the reservoir is flat to prevent spillage. *Put ring spanner over bleed nipple, followed by plastic tube. Feed tube into the old bottle, and tape the bottle to fork/frame to it doesn’t get knocked over *Now, remove top cam and diaphragm from the lever. *Undo the bleed nipple ¼ of a full turn (anticlockwise) and squeeze the lever slowly all the way to the bars. *Close the bleed nipple. *Let the lever return to normal position. – note how the fluid level decreases during this step. *Repeat this open-pull-close-release procedure until all fluid is replaced. Remember to top up the reservoir periodically. If you see the reservoir empty, you will have introduced air into the system – keep going and don’t let it get that low again! *Watch the tube on the bleed nipple for a colour change (showing you when the new fluid has flushed the system) and for bubbles. Keep going until no more bubbles are seen. It is worth tapping the lever and calliper periodically (sharply with a spanner or similar) to free trapped air. *Once you are satisfied, close the bleed nipple and top up the fluid reservoir to the brim. *Now get the rubber diaphragm (may be stuck under top cap) and roll it on from one side so as to minimise air trapped beneath it (if you just plonck it on top, there will be trapped air which may work its way into the system when bike is upside down). Keep the rag directly under the lever at this point, its can be messy with overflowing fluid. *Then replace top cap, and wipe down lever. *Remove bleed equipment from the calliper, make sure there is no fluid present that may contaminate pads or disk. *Wash hands before reinstalling pads/disk – your fingers will be covered in fluid! *Now dab copper grease on the back of the pads (helps reduce noise and seizing pistons) and reinstall them, followed by the wheel. *Pump the lever to re-centre the pads. *Ride! :'( FAQ if you like guys! thought i may as well write a proper how-to (applies to all hope brakes using the mini lever) as a lot of people don't know how to bleed brakes properly. i can also write up a section appliying to the old pro and sport levers too if any one needs it. Edited November 26, 2005 by nmt_oli Quote Link to comment Share on other sites More sharing options...
squince Posted November 26, 2005 Author Report Share Posted November 26, 2005 (edited) Done it and its worked but i cant get the f**king resivior to stop leaking ffs EDIT: all sorted now...there was a little crack in the seal...amazing what a cigarette lighter can do :'( Edited November 26, 2005 by squince Quote Link to comment Share on other sites More sharing options...
nmt_oli Posted November 26, 2005 Report Share Posted November 26, 2005 Hmmm, you may need to replace the rubber diaphragm then. sometimes they an split or tear when you undo / do up the screws as it can twist the rubber. how badly is it leaking? are there any dents in the top cap, or is it all good condition? Quote Link to comment Share on other sites More sharing options...
squince Posted November 26, 2005 Author Report Share Posted November 26, 2005 Cheers, Its Worked mint :'( Thanks alot man cheers andy Quote Link to comment Share on other sites More sharing options...
dwarrick Posted November 26, 2005 Report Share Posted November 26, 2005 the cap for the resivor doesnt have to be super tight. I had a leak occur once becuse i tighten the cap down to much and could figure out why it would not stop leaking. basically hand tight and not much more than a full turn with an allan key. Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted November 26, 2005 Report Share Posted November 26, 2005 amazing what a cigarette lighter can do :'( lol, did you put a cigerette lighter near a brake containing dot 5 fluid? :'( Is that stuff flammable btw? Quote Link to comment Share on other sites More sharing options...
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