Re: RE: Re: Bleeding Disc's

On 3/21/2025 12:54 PM, cyclintom wrote:

On Thu Mar 20 15:44:34 2025 Mark J cleary  wrote:

On 3/20/2025 2:46 PM, cyclintom wrote:

I can't say what's going on. The fact that you had to bleed the rear brakes backwards but I cured the front brakes which you would think wouldn't be a problem since it is all vertical hoses was amazing. Bleeding that brake from top to bottom releases a lot of air bubbles after which the disk levers were hard and with about a half way pull to lock.
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The levers with the bleeding cap off appeared top be full of liquid so the levers were full and it couldn't be air trapped somewhere in the levers.
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but installing a funnel and filling it half way and using the syring on the bottom pulled a great deal of air out of the system.
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So while the Shimano instructions and most of the videos showed bottom to top, bleeding trom top to bottom as one video, made by a woman mechanic seems to be the only way to get the brake properly bled.

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I have done it both ways and all seem to work about the same. However
getting in a hurry and not letting things settle is a problem. This
youtube video I watched is great and this works great.
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https://www.youtube.com/watch?v=brLF56banjs
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-- Deacon Mark

    I have entirely internal hoses and bottom to top does not work. I would have to tip my bike virtually onto its rear wheel and my stand doesn't like that.

Detach caliper from its mount so it hangs below line.
Slack handlebar clamp at the stem if needed to get the lever port horizontal.
Push fluid from bottom to top.
Tap caliper to dislodge air bubbles while pushing the fluid.
You're welcome.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971