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Builder630
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« on: May 30, 2014, 09:54:13 AM » |
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Ok... Removed rear wheel for bearings and rear end service, when I put the brakes back on they were extremely weak. Had noticed one piston worked faster than the other so I took apart caliper, thoroughly cleaned the inside, installed new piston seals etc. SAME PROBLEM. So I then took out master cylinder, took it apart and cleaned it up, SAME PROBLEM. Also, when I apply the brake, the caliper seems to twist a bit thus not retracting properly. Also I never get that hard pedal feel. Yes I bled it, MANY MANY times and yes I lubed the pins in the caliper. I'm about ready to give up and take it to a shop, something I've never done, or just buy a master cylinder and caliper from pinwall. Any ideas? Is there a reason I'm getting that flex? Ideas?
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BigMac (SoCal)
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« Reply #1 on: May 30, 2014, 12:23:08 PM » |
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One of your pistons is hanging up. You will need to take the caliper apart and make sure you have nothing that could cause that. Maybe a burr or twisted seal. Make sure to lube with plenty of brake fluid before pushing the piston back in the caliper. Sometimes you don't see anything and it works when you put it back together. It's happened to me.
Dave
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Grumpy
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« Reply #2 on: May 30, 2014, 12:34:49 PM » |
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When you remove the pistons, and remove the rubber seals clean the grooves the seals go in. They will build up a white corrosion that forces the seal to sit higher in the groove than it should. That will cause the pistons to bind. I have found that to be the problem with every caliper I have rebuilt.
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 Life is like a hot bath. It feels good while you’re in it, but the longer you stay in, the more wrinkled you get. |
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pancho
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« Reply #3 on: May 30, 2014, 12:55:36 PM » |
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What do you clean those grooves with Grumpy?
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The most expensive things you will purchase, are those things you would not have needed if you had listened and obeyed.
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Builder630
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« Reply #4 on: May 30, 2014, 01:29:16 PM » |
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I did completely dismantle them, I had the crud but not bad. I removed the seals, used brake cleaner and a tiny wire brush, polished the cylinder, pistons, same results though. Is the caliper backing plate supposed to flex a bit?
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Grandpot
Member
Posts: 630
Rolling Thunder South Carolina Chapter 1
Fort Mill, South Carolina
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« Reply #5 on: May 30, 2014, 01:37:15 PM » |
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Did you change the brand of pads just before you noticed the problem? Stick with Honda pads. It may be as simple as that. Good luck.
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 Experience is recognizing the same mistake every time you make it. |
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Builder630
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« Reply #6 on: May 30, 2014, 01:44:55 PM » |
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I just bought the bike, drive around 300 miles and heard a terrible noise. Had her towed home and changed the rear bearings, u-joint and shock bushings. The breaks worked fine prior to this.
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bentwrench
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« Reply #7 on: May 30, 2014, 02:05:51 PM » |
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The little brass wire wheel that comes in a dremmel asst.works real nice at cleaning those grooves.don't use the steel brush.
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