== Some useful links below == Update: One eBay link found too
This is a simple fix for a potentially expensive ST-R7020 replacement due to a hydraulic oil leak. It may work for ST-8020/25 and ST-7025.
Part number that you may need is Y0C578000 or Y0C678000 for this particular problem. In my case, I didn't replace the part, simply straightened the rubber.
If you have any questions, please let me know and I'll try to answer. I am not an expert on bike mechanics, I am just an average user and usually fix my own bike problems.
Like and subscribe that will encourage me to produce videos for day to day problems.
Enjoy!
Some close up shots:
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Detailed diagram:
[ Ссылка ]
On eBay (don't ship to Germany for some strange reason):
[ Ссылка ]
I found these links to buy the diaphragm:
UK: (I am not 100% sure but according to the service PDF this is the correct part for ST-R7020, please check with them before the purchase)
[ Ссылка ]
[ Ссылка ]
Aliexpress:
[ Ссылка ] (Please pay attention to the side)
[ Ссылка ]
Hagemeijer online shop: (Netherlands)
Left side: [ Ссылка ]
Right side: [ Ссылка ]
