Shimano Spares Bleed Screw and O-Ring - ST-R7020
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eBayShimano Bleed Screw & O-Ring - Y0F398030 for ST-R7020/R7025 - 105
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Product Information
Full details
This replacement bleed screw and O-ring set is designed for home mechanics and professional technicians maintaining Shimano ST-R7020 hydraulic brake systems. It provides a precision-engineered seal essential for maintaining hydraulic pressure and preventing fluid leaks after brake maintenance, though it requires specific knowledge of hydraulic bleeding procedures to install correctly.
All features
| Model Part Number | ST-R7020 |
|---|---|
| Brand | Shimano Spares |
Extended Product Information
FAQs
Can I use this on other Shimano hydraulic levers?
No, this specific bleed screw is designed for the ST-R7020 architecture. Please check your specific component model number before purchase.
Is the O-ring included separately?
This set is sold as a pair, ensuring you have both the screw and the required sealing O-ring for a complete installation.
Do I need to bleed the brakes after installing this?
Yes, installing a new bleed screw will introduce air into the system. A full hydraulic bleed is required to maintain brake function.
What tools are required for installation?
You will need the appropriate sized hex wrench or screwdriver as indicated by your specific ST-R7020 unit, along with a clean rag and mineral oil.
How often should the bleed screw be replaced?
There is no set interval, but it should be replaced immediately if the hex head is rounded off, the threads are damaged, or the O-ring shows signs of cracking.
Troubleshooting
Fluid continues to leak after installation
Verify that the O-ring is properly seated and not pinched, and ensure the bleed screw is tightened to the recommended manufacturer torque specification.
Difficulty threading the screw into the lever
Stop immediately to avoid cross-threading. Clean the threads on the lever body with a soft brush and ensure the screw is perfectly perpendicular to the port before turning.
Pros and Cons
Pros
- Genuine Shimano quality for perfect fitment
- Prevents hydraulic fluid leakage
- Restores reliable braking performance
- Includes necessary sealing O-ring
Cons
- Requires professional-grade mineral oil brake tools
- Small parts are easily lost during installation
- Specific to ST-R7020 models only
Setup, Compatibility & Care
This kit is exclusively compatible with the Shimano ST-R7020 hydraulic brake lever. To install, ensure the area around the bleed port is cleaned with isopropyl alcohol to prevent contamination. When installing, tighten the screw until seated, then apply a final light turn; do not over-torque, as this can damage the internal threads of the lever body. Always ensure the O-ring is properly seated before threading the screw into the housing to guarantee an effective seal.