Hope C2 sticky piston
Craig24
Posts: 150
Hi,
I'm having an issue with my Hope C2's.
The front brake is rubbing. So I have a look at the caliper and one of the pistons isn't returning as far back as the other.
So I spray it with anti-seize pump it out and push back in using a tyre lever. It eventually becomes free and seems to return correctly, I then clean it up and lube it with Hunters Silcone Lube as suggested on a Hope tech video.
After riding for 20 mins the problem returns the exact same, I repeat the process and it seems ok again. I ride again for 20 mins and the problem is back?
I don't know why it repeatedly becomes sticky?
Any advise on the next course of action? I'm thinking I'm going to have to open the caliper up, get the pistons out and clean them? Does that sound right or is there a trick I'm missing here? I have the dials on the levers turn out as far as they go.
I'm having an issue with my Hope C2's.
The front brake is rubbing. So I have a look at the caliper and one of the pistons isn't returning as far back as the other.
So I spray it with anti-seize pump it out and push back in using a tyre lever. It eventually becomes free and seems to return correctly, I then clean it up and lube it with Hunters Silcone Lube as suggested on a Hope tech video.
After riding for 20 mins the problem returns the exact same, I repeat the process and it seems ok again. I ride again for 20 mins and the problem is back?
I don't know why it repeatedly becomes sticky?
Any advise on the next course of action? I'm thinking I'm going to have to open the caliper up, get the pistons out and clean them? Does that sound right or is there a trick I'm missing here? I have the dials on the levers turn out as far as they go.
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Comments
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Sounds like new seals time. have to be very careful what you use to unsieze them as they can cause the seals to swell or degrade. But is natural after time though.0
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Didn't consider the seal!
Is it just one of these -
http://www.ukbikestore.co.uk/product/38 ... sp035.html0 -
I think so! But I'd just call hope TBH.0
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Try stripping the caliper and lubing the pistons with some brake fluid, the pistons come out easily with a pin spanner if they're tight to remome is a good sign the seals have swelled.Dmr Transition 26"
Giant Anthem 27.5 SX
Giant Defy Advanced Pro 1
Cannondale Chase0 -
I think I will order up a set of new seals, then strip it down and just replace them all while I've got it apart. Thanks for the advice!0
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Ok, quick update. I opened the calliper and managed to get the pistons out, not easily though, they were very hard to unscrew! They looked very clean and the seals had no cracks and looked in very good shape. I cleaned the pistons then lubed them with hunters silicone lubricant, they then went back in a lot easier, screwed in very easy.
Just need to bleed them tomorrow then test them out, will be back to update.0 -
Ok, so got them back on the bike and they seem worse! Rubbing like mad.
Do I have to get the Hope seals or are these a standard size I can buy from anywhere?0 -
Hope all the way. Propriety stuff.0
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