Shimano SM-BH90 - Olive and Connector Insert

The olive provides a seal between the brake hose and the brake component, preventing fluid leaks.

You will need a hose cutter, a way to tighten the fitting (usually a wrench), and possibly a bleed kit.

No, it is recommended to replace the olive and insert whenever you disconnect or shorten the brake hose.

Refer to Shimano's official documentation or search online for video guides for your specific brake model.

Always use Shimano mineral oil, as specified by Shimano.

Replace the olive and insert any time you disconnect or shorten the brake hose.

These parts are specifically designed for Shimano Deore brakes and BH90 hose. Compatibility with other brands is not guaranteed.

Check for air in the brake lines. Bleed the brakes following Shimano's instructions.

Ensure the olive and insert are correctly installed and the fitting is properly tightened. Re-install if necessary.

Make sure the hose is cut cleanly and use a small amount of mineral oil to lubricate the hose end before insertion.