scotty007 Posted January 17, 2010 Report Share Posted January 17, 2010 Hi just serviced my Hope mini 3 caliper and noticed a small leak coming from the caliper body itself .Iv taken it apart twice now to check everything is as it should be and it is, but the little bugger keeps leaking at the same spot . The bleed is perfect untill a couple of lever pulls and goes all spongy. I just wanetd to know if there is a fix for this such a sealent that can close the gap much like a seal on car engine cover . The diagrm shows where the leak is coming from thanks people Quote Link to comment Share on other sites More sharing options...
Brisa Posted January 17, 2010 Report Share Posted January 17, 2010 (edited) Did you rebuild it with new seals? There is a small oring between the halfs that could have a small nip or even just be too old to be effective. I would try changing that as a precaution and go from there. Diagram Link No.7 on that diagram. Edited January 17, 2010 by Brisa Quote Link to comment Share on other sites More sharing options...
scotty007 Posted January 17, 2010 Author Report Share Posted January 17, 2010 Did you rebuild it with new seals? There is a small oring between the halfs that could have a small nip or even just be too old to be effective. I would try changing that as a precaution and go from there. Diagram Link No.7 on that diagram. Yer all the seal were replaced when stripped down all the nuts are done up super tight to make sure. This has me stumped and in need of a fix asap . Quote Link to comment Share on other sites More sharing options...
Brisa Posted January 17, 2010 Report Share Posted January 17, 2010 It could be the ring has moved as your were putting the halfs together, try loosening the bolts and tightening them evenly and firm but not over tight. I still think the problem lies with the oring as there nothing else that could really cause it to leak from that area. Quote Link to comment Share on other sites More sharing options...
LukasMcNeal Posted January 17, 2010 Report Share Posted January 17, 2010 I would strip it again as there might be the smallest particle of mud/dust causing it? Quote Link to comment Share on other sites More sharing options...
scotty007 Posted January 17, 2010 Author Report Share Posted January 17, 2010 I would strip it again as there might be the smallest particle of mud/dust causing it? Was thinking the same thing lukas. But also going to check the O ring as suggested but cant see it myself as i was super carefull when replacing it but you never know its worth ago . Quote Link to comment Share on other sites More sharing options...
LukasMcNeal Posted January 17, 2010 Report Share Posted January 17, 2010 Was thinking the same thing lukas. But also going to check the O ring as suggested but cant see it myself as i was super carefull when replacing it but you never know its worth ago . It's most probably worth it in the long run anyway Quote Link to comment Share on other sites More sharing options...
scotty007 Posted January 17, 2010 Author Report Share Posted January 17, 2010 Hi just serviced my Hope mini 3 caliper and noticed a small leak coming from the caliper body itself .Iv taken it apart twice now to check everything is as it should be and it is, but the little bugger keeps leaking at the same spot . The bleed is perfect untill a couple of lever pulls and goes all spongy. I just wanetd to know if there is a fix for this such a sealent that can close the gap much like a seal on car engine cover . The diagrm shows where the leak is coming from thanks people Well iv tryed again and again. Taken the caliper body apart cleaned the inside looked at the O ring and there is no split or holes present all refitted fresh bleed which is good, untill you pull the lever. Its still got a tiny tiny leak hardley noticeable really but its there. Im stuck for ideas now and thinking of trying to put some sort of sealent around the edge of the caliper to get a more perment seal any thoughts on this or sorting this pain in the arse will go a long way Quote Link to comment Share on other sites More sharing options...
Matt Burrows Posted January 17, 2010 Report Share Posted January 17, 2010 Well iv tryed again and again. Taken the caliper body apart cleaned the inside looked at the O ring and there is no split or holes present all refitted fresh bleed which is good, untill you pull the lever. Its still got a tiny tiny leak hardley noticeable really but its there. Im stuck for ideas now and thinking of trying to put some sort of sealent around the edge of the caliper to get a more perment seal any thoughts on this or sorting this pain in the arse will go a long way At work we usually put a small ring of grease where that seal sits to help prevent leaks, might be worth a try. Is there any damage to the inside caliper faces? Any small scratches could prevent the faces from sitting flush and sealing properly It could also be that the fluid you see is just fluid that got trapped between the faces when you were bolting the caliper together, and not actually a sign of leaking from that seal. Don't completely dismiss the chance that it is leaking somewhere else or that the bleed has air in it. Quote Link to comment Share on other sites More sharing options...
scotty007 Posted January 17, 2010 Author Report Share Posted January 17, 2010 At work we usually put a small ring of grease where that seal sits to help prevent leaks, might be worth a try. Is there any damage to the inside caliper faces? Any small scratches could prevent the faces from sitting flush and sealing properly It could also be that the fluid you see is just fluid that got trapped between the faces when you were bolting the caliper together, and not actually a sign of leaking from that seal. Don't completely dismiss the chance that it is leaking somewhere else or that the bleed has air in it. looked at it again after your post and a coffee to calm my nerves. Both faces seam fine no harsh marks, pits or scratches, so it was out with the grease this time, and all seams fine this time. lever feals solid and comes near to the bar when pulled with no visable leaks. Just an idea would putting a cable tie around the lever and bars in full lock show up anything. ie: leaks or traped air . And thanks for the feedback lads, as always its quick and direct. Quote Link to comment Share on other sites More sharing options...
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