Shimano Road Disc Brake Won't Take Fluid - HELP!
#1
Chases Dogs for Sport
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Shimano Road Disc Brake Won't Take Fluid - HELP!
I have filled and bled Shimano road discs several times without problems. It's easy . . . until it isn't. Can anyone help with this problem?
I replaced the rear caliper on my Shimano Ultegra R8070 disc brakes. I mounted the bleed cup at the bar and I opened the bleed valve on the caliper. I attached the full syringe. But when I try to push the fluid into the caliper, it acts as if there's a blockage. No matter how hard I push, the fluid doesn't flow into the caliper. I loosened the lever uptake adjustment at the handlebar, but still the fluid won't flow. Any ideas on how to fix the problem?
I replaced the rear caliper on my Shimano Ultegra R8070 disc brakes. I mounted the bleed cup at the bar and I opened the bleed valve on the caliper. I attached the full syringe. But when I try to push the fluid into the caliper, it acts as if there's a blockage. No matter how hard I push, the fluid doesn't flow into the caliper. I loosened the lever uptake adjustment at the handlebar, but still the fluid won't flow. Any ideas on how to fix the problem?
#3
Chases Dogs for Sport
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I took it to my LBS and they said it had a blockage in the line. Since there's nothing in the system that could be big enough to block the line, I SUSPECT this means that it developed a kink in the line where they routed it through the frame. At installation, they probably left the line longer than it needed to be and, eventually, a kink developed.
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Do you suspect the kink was already in there before you replaced the caliper? Was it functioning ok then? My brakes worked ok, just needed some regular bleeding, then I discovered this problem.
#5
Chases Dogs for Sport
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Yes, it was there before I replaced the caliper. That's why I replaced the caliper. I knew the lever was fine, so I assumed the caliper was the problem. Only when I replaced the caliper did I discover the problem was in the line.
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Hi. dont have a solution, just experience of similar problem with 2 ultegra disc brake levers.
Rear break stopped working over course of a few miles.
Thought it was either pads or fluid, so tried both.
Unable to top up the fluid in the reservoir. Took it to a bike shop, they had same problem with topping up and diagnosed the fault as a block somewhere in the lever system.
Purchased new lever - shop fitted it, but same problem.
its not the hose, or the calliper but the lever that's faulty.
This bike is only 6m old. Looks like Shimano have a problem somewhere.
Rear break stopped working over course of a few miles.
Thought it was either pads or fluid, so tried both.
Unable to top up the fluid in the reservoir. Took it to a bike shop, they had same problem with topping up and diagnosed the fault as a block somewhere in the lever system.
Purchased new lever - shop fitted it, but same problem.
its not the hose, or the calliper but the lever that's faulty.
This bike is only 6m old. Looks like Shimano have a problem somewhere.
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St r7850
Hey, anyone found a solution to this problem?
I’m having the same trouble. I can fill the break somehow from lever to caliper but it does not take fluid other way round. I reset all adjustments on the lever but does not help.
I’m having the same trouble. I can fill the break somehow from lever to caliper but it does not take fluid other way round. I reset all adjustments on the lever but does not help.
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I had the same issue today. I solved it by winding out the free stroke adjustment screw a couple of turns. It’s the one on the outside edge of the lever towards the bars. Obviously you have to push the hood back quite a bit if you have the bleed funnel on as it’s normally accessed by rolling the hood forward.