Hydraulic brakes need to be bled?
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Hydraulic brakes need to be bled?
For the last month or so, the front brake lever on my Kona has been inching closer to the bar. @ rest, the lever is closer to the bar than it should be. Now, when engaged, it almost bottoms out. Is it a leak? I cant see a leak. It works, but lever is too close. Rear brake is fine. Brakes have never been serviced; 5K miles at most. There is no noise. pls advise
#3
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For the last month or so, the front brake lever on my Kona has been inching closer to the bar. @ rest, the lever is closer to the bar than it should be. Now, when engaged, it almost bottoms out. Is it a leak? I cant see a leak. It works, but lever is too close. Rear brake is fine. Brakes have never been serviced; 5K miles at most. There is no noise. pls advise
My sram rivals tend to have less travel on the first few rides after a pad replacement, and then the travel returns to normal, which to be honest, is too close to the bars for my taste, but it can't be adjusted.
#4
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Probably air in the line. Air compresses, liquid doesn't.
#5
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Most manufacturers suggest bleeding approximately every year. 5k sounds like a totally normal interval for bleeding. That's a couplea chains for most people, a few sets of pads, etc. If you're mechanically inclined, it's not amazingly hard.
https://www.universalcycles.com/shop...s.php?id=88214 would be right for your Kona's Tektro brakes. Weird it doesn't include a bleed block, but you can just put a 10mm hex wrench into the caliper.
https://www.universalcycles.com/shop...s.php?id=88214 would be right for your Kona's Tektro brakes. Weird it doesn't include a bleed block, but you can just put a 10mm hex wrench into the caliper.
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For the last month or so, the front brake lever on my Kona has been inching closer to the bar. @ rest, the lever is closer to the bar than it should be. Now, when engaged, it almost bottoms out. Is it a leak? I cant see a leak. It works, but lever is too close. Rear brake is fine. Brakes have never been serviced; 5K miles at most. There is no noise. pls advise
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If the lever isn't returning to normal "open" position, there may be a mechanical or hydraulic blockage, maybe in the master cylinder. I agree, the first step would be normal service--replace fluid and bleed. Clean and check operation of the master cylinder without hydraulic pressure. Clean and check the wheel caliper pistons and seals as well. Disclosure: I've worked on way more auto brakes than bike brakes.
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Have you checked both the disc and pads for wear? If you've worn them way beyond limits then maybe a problem just adding more hydraulic fluid will only make worse.
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PS update: I think the caliper is leaking.
After four rides (bout 200mi), the front brake lever is feeling spongy. Im not gonna ride it again. I looked around the other calipers, and they are dusty. The front caliper is not dusty, but I cant call it damp either. OK, maybe a tiny bit damp. How to detect a leaky caliper? I cannot see a leak. I assume the only fix is replace (upgrade? ) the caliper, lever & hose? btw, when I clean the disc, (using alcohol pads) the outside is very dirty.
After four rides (bout 200mi), the front brake lever is feeling spongy. Im not gonna ride it again. I looked around the other calipers, and they are dusty. The front caliper is not dusty, but I cant call it damp either. OK, maybe a tiny bit damp. How to detect a leaky caliper? I cannot see a leak. I assume the only fix is replace (upgrade? ) the caliper, lever & hose? btw, when I clean the disc, (using alcohol pads) the outside is very dirty.
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PS update: I think the caliper is leaking.
After four rides (bout 200mi), the front brake lever is feeling spongy. Im not gonna ride it again. I looked around the other calipers, and they are dusty. The front caliper is not dusty, but I cant call it damp either. OK, maybe a tiny bit damp. How to detect a leaky caliper? I cannot see a leak. I assume the only fix is replace (upgrade? ) the caliper, lever & hose? btw, when I clean the disc, (using alcohol pads) the outside is very dirty.
After four rides (bout 200mi), the front brake lever is feeling spongy. Im not gonna ride it again. I looked around the other calipers, and they are dusty. The front caliper is not dusty, but I cant call it damp either. OK, maybe a tiny bit damp. How to detect a leaky caliper? I cannot see a leak. I assume the only fix is replace (upgrade? ) the caliper, lever & hose? btw, when I clean the disc, (using alcohol pads) the outside is very dirty.