I just use the 5.1 dot fluid too lube the pistons,5.1 dot is very thin and pulls itself inwards. Works perfectly,just let the pistons swim in the dot fluid and move the pistons 5 to 10 times in and out fully wet with the dot 5.1 and they will run smoothly again.
Great video thank you. I have had terrible problems with my hope pistons seizing solid so bad the wheel won't go round. I have used the silicon grease and also dot fluid on a cotton bud. Even after that the pistons are seized solid. I have destroyed two sets of pistons now trying to push them back in. This is then an expensive bike shop repair each time. There pistons are extremely fragile and break very easily. What can you suggest ?
@@daviddean15 hi, when pushing the pistons back in be sure to apply pressure evenly to the pistons otherwise they will not push back into their bores (because they’re being pushed in very slightly crooked). You can also open the bleed valve on the caliper slightly (wrap a cloth around it to catch any fluid) and push the pistons in evenly. Although this may require that you bleed the brake afterwards. You can use a robust tyre lever to push the pistons back in - this is less likely to damage the pistons. Hope sell a rebuild kit and spare pistons. It’s easy enough to rebuild the brake yourself if you take your time. The brake will need bled after a rebuild. Hope this helps.
Please help , I bought hope tech 3 V4 front brake and when it arrives on of the pistons wete out and I can't get it back in and I can't get the pads in how will I get it back in ?
The brakes need the piston seals to spring very slightly to pull the pistons back, Red rubber grease is fine, but silicone grease can cause too much slip so the brakes don't release. I ruined a set of motorbike brakes (same design but bigger) using silicone lubes. The brakes came on just fine, but would not release. No amount of cleaning ever solved the problem.
Hope’s in-house techs use silicone grease on their pistons: th-cam.com/video/A9renV3fxts/w-d-xo.html I imagine which grease to use depends on the brake/manufacturer. Bummer about your moto brakes!
@@rhubarb3 I contacted hope directly, since I can’t get their specific “Hunter’s Silicone grease” that they mentioned. So they told me to use Red Rubber grease as an alternative.
@@ianw3811 good to know. I've had luck with generic silicone plumber's grease from hardware stores around the US too, if that's where you're at. Though that doesn't come directly recommended.
To get the spring off - remove the small circlip (i use needle nose pliers to do this) and undo/remove the allen key bolt that goes thru the caliper. The brake pads can now be slid out of the caliper and the spring will come out with the pads. To put back on - attach the spring to each of the pads, it will just slide on, then pinch the pads together and push them back into the caliper. Re-insert the bolt you removed - the pads and spring may need a bit of wiggling - then tighten the bolt (lightly) and attach the circlip thru the end of the bolt. Job done :)
I just use the 5.1 dot fluid too lube the pistons,5.1 dot is very thin and pulls itself inwards.
Works perfectly,just let the pistons swim in the dot fluid and move the pistons 5 to 10 times in and out fully wet with the dot 5.1 and they will run smoothly again.
Thank you great video
Great video thank you. I have had terrible problems with my hope pistons seizing solid so bad the wheel won't go round. I have used the silicon grease and also dot fluid on a cotton bud. Even after that the pistons are seized solid. I have destroyed two sets of pistons now trying to push them back in. This is then an expensive bike shop repair each time. There pistons are extremely fragile and break very easily. What can you suggest ?
@@daviddean15 hi, when pushing the pistons back in be sure to apply pressure evenly to the pistons otherwise they will not push back into their bores (because they’re being pushed in very slightly crooked). You can also open the bleed valve on the caliper slightly (wrap a cloth around it to catch any fluid) and push the pistons in evenly. Although this may require that you bleed the brake afterwards. You can use a robust tyre lever to push the pistons back in - this is less likely to damage the pistons. Hope sell a rebuild kit and spare pistons. It’s easy enough to rebuild the brake yourself if you take your time. The brake will need bled after a rebuild. Hope this helps.
Where do i buy the rear bracket to fit the rear hope mono mini brake caliper
Please help , I bought hope tech 3 V4 front brake and when it arrives on of the pistons wete out and I can't get it back in and I can't get the pads in how will I get it back in ?
Brilliant! Thanks
The brakes need the piston seals to spring very slightly to pull the pistons back, Red rubber grease is fine, but silicone grease can cause too much slip so the brakes don't release. I ruined a set of motorbike brakes (same design but bigger) using silicone lubes. The brakes came on just fine, but would not release. No amount of cleaning ever solved the problem.
I’ll try red rubber grease next time 👍
Hope’s in-house techs use silicone grease on their pistons: th-cam.com/video/A9renV3fxts/w-d-xo.html
I imagine which grease to use depends on the brake/manufacturer. Bummer about your moto brakes!
@@rhubarb3 I contacted hope directly, since I can’t get their specific “Hunter’s Silicone grease” that they mentioned. So they told me to use Red Rubber grease as an alternative.
@@ianw3811 good to know. I've had luck with generic silicone plumber's grease from hardware stores around the US too, if that's where you're at. Though that doesn't come directly recommended.
Just use DOT fluid
I cant push the pistons back in..
Make sure you are pushing the piston in evenly.
How do you get that spring off and put it back on ?
To get the spring off - remove the small circlip (i use needle nose pliers to do this) and undo/remove the allen key bolt that goes thru the caliper. The brake pads can now be slid out of the caliper and the spring will come out with the pads. To put back on - attach the spring to each of the pads, it will just slide on, then pinch the pads together and push them back into the caliper. Re-insert the bolt you removed - the pads and spring may need a bit of wiggling - then tighten the bolt (lightly) and attach the circlip thru the end of the bolt. Job done :)