how to replace mtb hydraulic hose | Passionhose

Hydraulic hoses are a crucial part of any mountain bike's braking system. Over time, these hoses can wear out or become damaged, leading to leaks or decreased performance. If you're experiencing issues with your hydraulic hose, it may be time to replace it. In this guide, we'll walk you through the steps of replacing your MTB hydraulic hose to get your bike back in top condition.

Gather Your Tools and Supplies

Before you begin the replacement process, make sure you have all the necessary tools and supplies on hand. You will need a set of hex wrenches, cable cutters, a clean rag, hydraulic brake fluid, and a replacement hydraulic hose that is compatible with your brake system. It's essential to use the correct hose for your specific brake model to ensure proper function and safety.

Remove the Old Hydraulic Hose

Start by removing the wheel from the bike to give you better access to the brake caliper. Next, use your hex wrench to loosen the bolt that holds the hose to the caliper. Once the bolt is loosened, you can gently pull the hose out of the caliper. Be careful not to spill any hydraulic fluid during this process, as it can damage your bike's paint and components.

With the hose removed from the caliper, follow it up to the brake lever, where it will be attached with another bolt. Use your hex wrench to loosen and remove this bolt, then carefully pull the old hose out of the lever. Again, be cautious not to spill any fluid.

Prepare the New Hydraulic Hose

Before installing the new hydraulic hose, you'll need to prepare it for installation. Start by cutting the hose to the correct length using your cable cutters. Make sure to cut the hose cleanly and squarely to ensure a proper seal. Once the hose is cut, use a clean rag to wipe off any dirt or debris from the ends of the hose.

Next, insert the olive and barb fittings into the cut end of the hose. The olive is a small metal ring that helps create a seal, while the barb fitting is a small, tapered piece that holds the hose in place. Make sure the fittings are fully seated in the hose to prevent any leaks.

Install the New Hydraulic Hose

With the new hose prepared, it's time to install it on your mountain bike. Start by feeding the end of the hose through the lever and into the hose fitting. Tighten the bolt to secure the hose in place, being careful not to overtighten. Next, feed the other end of the hose through the caliper and attach it using the bolt provided.

Once the hose is securely attached at both ends, it's time to bleed the brake system to remove any air bubbles. Follow the manufacturer's instructions for bleeding your specific brake model, being careful to use the correct hydraulic fluid and technique.

Test Your Brakes

After bleeding the brake system, reinstall the wheel on your mountain bike and give your brakes a test. Squeeze the brake lever to ensure that the caliper is compressing properly and that there are no leaks in the system. If everything feels and looks good, take your bike for a short test ride to make sure the brakes are working correctly under normal riding conditions.

In conclusion, replacing the hydraulic hose on your mountain bike is a relatively straightforward process that can be done at home with the right tools and knowledge. By following these steps carefully and using the correct materials, you can ensure that your brakes function properly and safely. If you're unsure about any part of the process, don't hesitate to consult a professional bike mechanic for assistance. With your new hydraulic hose installed, you'll be back on the trails in no time, enjoying smooth and reliable braking performance.