The title "Dior XT Bremsen Entlüften" is a slight misnomer, as Dior is a fashion house and not associated with bicycle components. The correct reference points to Shimano's XT disc brakes. This article will provide a comprehensive guide on bleeding Shimano disc brakes, specifically focusing on the models from 2013-2014 and beyond, using the one-way bleeding method applicable to XTR, XT, SLX, Deore, LX, and Zee brakes. We'll cover the process step-by-step, addressing common issues and offering tips for a successful bleed, making it suitable even for beginners.
Understanding the Need for Bleeding Shimano Disc Brakes
Shimano disc brakes rely on hydraulic pressure to engage the brake pads. Air bubbles in the hydraulic line compromise this pressure, leading to spongy or unresponsive brakes – a serious safety hazard. Several factors can introduce air into the system:
* Installation of new brake calipers or levers: This is the most common reason.
* Repair work: Any work involving opening the hydraulic system can introduce air.
* Wear and tear: Over time, seals can degrade, allowing air ingress.
* Accident damage: A crash can damage the system and introduce air.
Ignoring air in your brake lines is dangerous. It's crucial to bleed your brakes whenever you suspect air is present. The symptoms are unmistakable: a soft, spongy brake lever with little stopping power, or a lever that travels almost to the handlebar before engaging the brakes.
Tools and Materials Required
Before you begin, gather the necessary tools and materials. Improper tools can damage your brake system, so invest in quality items.
* Shimano Bleeding Kit (recommended): Shimano offers specific bleeding kits tailored to their brakes. These kits contain everything you need, including syringes, hoses, and adaptors. Using a Shimano kit ensures compatibility and simplifies the process.
* Mineral Oil (Shimano Brand): Use only Shimano mineral oil. Other fluids can damage the seals and components within your brake system. Do not use DOT fluid, which is designed for different brake systems.
* Clean Rags or Paper Towels: For cleaning spills and wiping surfaces.
* Container for used oil: Avoid spilling used oil.
* Small Phillips Head Screwdriver (possibly): Depending on the caliper design, you may need this to access bleed screws.
* Zip Ties or Clamps (optional): To securely hold the brake lever in place.
* Patience: Bleeding brakes takes time and precision.
Step-by-Step Bleeding Process (One-Way Bleeding Method)
This guide details the one-way bleeding method, the preferred method for most modern Shimano brakes.
Preparation:
1. Clean the area: Ensure the area around your bike is clean to prevent debris from contaminating the brake fluid.
2. Protect your bike: Cover sensitive areas of your bike with rags or paper towels to avoid accidental oil spills.
3. Prepare the bleeding kit: Assemble the components of your Shimano bleeding kit according to the instructions provided.
Bleeding the Brakes:
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