jedibiker Posted March 2, 2023 Share Posted March 2, 2023 Hey all. So I gave the wifes bikes rear brake a service as it looked manky as hell. New seals, pads and fluid, cleaned piston. and after maybe 200 mile it wants to bind on more than it should These are a weird fitment as sit on a ledge as such not giving great movement. Cleaned the pin again today and gave it once over, but What else could I be missing here.? it does live outside so the wash it gets when we get home may not have helped. I have to admit to not drying off the brakes as we were in a rush last time losing light. If that could be a cause. Thinking im keeping on top of things then feel a but useless.. Quote Link to comment Share on other sites More sharing options...
Copycat73 Posted March 2, 2023 Share Posted March 2, 2023 did you put the seal in the right way round ? Quote Link to comment Share on other sites More sharing options...
Stu Posted March 2, 2023 Share Posted March 2, 2023 Can you get a picture of the caliper? Usually if its had new seals etc then it would be the slide thats sticking Quote Link to comment Share on other sites More sharing options...
jedibiker Posted March 3, 2023 Author Share Posted March 3, 2023 13 hours ago, Copycat73 said: did you put the seal in the right way round ? Hi yeah, i think it would leak like mad if not anyway or just not sit right. Quote Link to comment Share on other sites More sharing options...
jedibiker Posted March 3, 2023 Author Share Posted March 3, 2023 13 hours ago, Stu said: Can you get a picture of the caliper? Usually if its had new seals etc then it would be the slide thats sticking yeah Il grab one today. I do suspect the way the top of the pads sit on a housing not attached to the caliper is the issue, its a metal plate that sits on aluminium cast. have cleaned it but it seems like a weird design Quote Link to comment Share on other sites More sharing options...
jedibiker Posted March 3, 2023 Author Share Posted March 3, 2023 this stays on for caliper clean or if the wheel stays on. the lip at the back towards the gromit is where they sit, but a steel shiny plate sits there. a mate asked if too much fluid in the res, id not considererd that at all Quote Link to comment Share on other sites More sharing options...
Mississippi Bullfrog Posted March 3, 2023 Share Posted March 3, 2023 A dud hose can cause brakes to seize on. They collapse internally making in effect a one way valve. The fluid can move to apply the brakes but then flow back to release them. Quote Link to comment Share on other sites More sharing options...
jedibiker Posted March 3, 2023 Author Share Posted March 3, 2023 11 minutes ago, Mississippi Bullfrog said: A dud hose can cause brakes to seize on. They collapse internally making in effect a one way valve. The fluid can move to apply the brakes but then flow back to release them. That makes alot of sense. the bike she got is lovely but has not been well maintained in general. Fluid was a little high too which certainly wont help.. rookie error Quote Link to comment Share on other sites More sharing options...
Stu Posted March 3, 2023 Share Posted March 3, 2023 9 hours ago, jedibiker said: this stays on for caliper clean or if the wheel stays on. the lip at the back towards the gromit is where they sit, but a steel shiny plate sits there. a mate asked if too much fluid in the res, id not considererd that at all I would put something in the caliper between the pads and pump the brake and see if the piston retracts once released. You will notice as whatever you put in you should easily be able to take it out again. Did you clean out the rubbers where the slides go and did you grease them back up? they look a bit dry in that pic Quote Link to comment Share on other sites More sharing options...
jedibiker Posted March 4, 2023 Author Share Posted March 4, 2023 14 hours ago, Stu said: I would put something in the caliper between the pads and pump the brake and see if the piston retracts once released. You will notice as whatever you put in you should easily be able to take it out again. Did you clean out the rubbers where the slides go and did you grease them back up? they look a bit dry in that pic Yeah I had new rubbers and greased inside well. The photo above is not mine and just to show the ledge for the pads. its off ebay. (i should have said) Will try the test though, may treat her to new hoses 1 Quote Link to comment Share on other sites More sharing options...
Stu Posted March 4, 2023 Share Posted March 4, 2023 30 minutes ago, jedibiker said: Yeah I had new rubbers and greased inside well. The photo above is not mine and just to show the ledge for the pads. its off ebay. (i should have said) Will try the test though, may treat her to new hoses The ledge for the pads is normal although there is usually a metal/stainless steel bit that goes on there Its always wise to put a touch of copper grease on there too but that won't be the reason the brakes are sticking Also check that the brake lever is returning to the correct position and not sticking on slightly Forget the hoses until you have tried everything else although it can happen where they collapse its pretty rare and I am a firm believer in checking everything before spending money as you could just be chasing a fault Quote Link to comment Share on other sites More sharing options...
Yorky Posted March 4, 2023 Share Posted March 4, 2023 2 hours ago, Stu said: and I am a firm believer in checking everything before spending money Proper Yorkshire 1 2 Quote Link to comment Share on other sites More sharing options...
jedibiker Posted March 4, 2023 Author Share Posted March 4, 2023 6 hours ago, Stu said: The ledge for the pads is normal although there is usually a metal/stainless steel bit that goes on there Its always wise to put a touch of copper grease on there too but that won't be the reason the brakes are sticking Also check that the brake lever is returning to the correct position and not sticking on slightly Forget the hoses until you have tried everything else although it can happen where they collapse its pretty rare and I am a firm believer in checking everything before spending money as you could just be chasing a fault Yeah i mentioned the plate but the photo is misleading really, just wanted to show where they sit, usually they sit all in the caliper and can move better. did add a very slight bit of grease this time Quote Link to comment Share on other sites More sharing options...
Stu Posted March 4, 2023 Share Posted March 4, 2023 15 minutes ago, jedibiker said: Yeah i mentioned the plate but the photo is misleading really, just wanted to show where they sit, usually they sit all in the caliper and can move better. did add a very slight bit of grease this time Its been a long time since I had a bike where the pads are in the caliper my most recent bikes all have a similar design to that one Anyway it can only be the pistons not retracting back in the caliper or the slides sticking thats causing it to bind I have twisted a seal when assembling calipers in the past which can cause them to stick too Quote Link to comment Share on other sites More sharing options...
jedibiker Posted March 4, 2023 Author Share Posted March 4, 2023 1 hour ago, Stu said: Its been a long time since I had a bike where the pads are in the caliper my most recent bikes all have a similar design to that one Anyway it can only be the pistons not retracting back in the caliper or the slides sticking thats causing it to bind I have twisted a seal when assembling calipers in the past which can cause them to stick too didnt it leak? our last bikes were 2003 and 2006. This is a 2011 and my 2014 has a different back caliper but Ive not looked into that as its working perfect lol Quote Link to comment Share on other sites More sharing options...
Stu Posted March 4, 2023 Share Posted March 4, 2023 1 hour ago, jedibiker said: didnt it leak? No as it was the dust seal I should have said really 1 Quote Link to comment Share on other sites More sharing options...
Ronnie Posted March 4, 2023 Share Posted March 4, 2023 10 hours ago, Yorky said: Proper Yorkshire Nothing wrong with that ! Mony a mickle maks a muckle ! 1 Quote Link to comment Share on other sites More sharing options...
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