Deore brakes going to the bar
othello
Posts: 577
I'm pretty certain this is an issue with air in the system, but I wanted to check first before I start fiddling around!
I've got a set of Deore 615 brakes, which have always worked well, with only the occasional quick bleed needed with the cup on the lever.
Recently I've noticed an issue when I get the bike out of the shed. The lever will go all the way to the bar when pulled and the brakes don't go on. I end up doing a fair few pumps of the lever and gradually the brake returns to normal. This also happened when I went o Bike Park Wales last year, every time I picked up the bike off the uplift trailer.
Is this air in the system, which gets pushed along if the bike is on its back wheel, being wheeled around etc? When level and the system pumped, it returns to normal?
Doing a full (top down) bleed should fix it?
Or are the brakes on their way out?
I've got a set of Deore 615 brakes, which have always worked well, with only the occasional quick bleed needed with the cup on the lever.
Recently I've noticed an issue when I get the bike out of the shed. The lever will go all the way to the bar when pulled and the brakes don't go on. I end up doing a fair few pumps of the lever and gradually the brake returns to normal. This also happened when I went o Bike Park Wales last year, every time I picked up the bike off the uplift trailer.
Is this air in the system, which gets pushed along if the bike is on its back wheel, being wheeled around etc? When level and the system pumped, it returns to normal?
Doing a full (top down) bleed should fix it?
Or are the brakes on their way out?
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It’s also worth checking for signs of fluid leaking anywhere.
And it all promised so so much”
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https://epicbleedsolutions.com/blogs/guides/5-minute-shimano-mini-bleed
Might aswell get the bigger tub of shimano oil. you'll use it.
M615's (or is that all shimano brakes) dont like being tipped up.
I find a caliper up flush and bleed works better, spending a long time flicking the lever and tapping hoses etc is worth it for piece of mind that the bleed the best it can be. Finally making sure to properly fill the lever to the brim of the bleed port so no space left for air to get into system when bike is upside down etc.