How to Rebuild Fox Shox MTB Shock. Trail Breaker

Introduction

Rebuilding and servicing your Fox Shox mountain bike rear shock can enhance performance and prolong its lifespan. This tutorial will guide you through the straightforward process of servicing your shock, based on a step-by-step method. Whether you ride a Trek Fuel EX 9.8 or another model, these instructions will help you get your shock back in optimal condition.

Step 1: Remove the Air Can

• Prepare your workspace: Ensure you have a clean, organized area with sufficient lighting.
• Release air pressure: Before starting, release any air pressure from the shock by slowly unscrewing the air valve.
• Unscrew the air can: Use a suitable tool to carefully unscrew the air can from the shock body.
• Cycle the shock: Incrementally release air while cycling the shock through its travel to avoid creating an air lock in the negative chamber.

Step 2: Remove Old Seals

• Extract old seals: Use a seal removal tool or a small pick to carefully pry out the old seals from the shock body and air can.
• Inspect for damage: Check the seal grooves for dirt or damage before proceeding to install new seals.

Step 3: Install New Seals

• Prepare new seals: Take your Fox Shox seal kit and ensure you have the correct sizes for your shock model.
• Install seals in the shock body: Carefully insert the new seals into the appropriate grooves. Ensure they are seated evenly.
• Install seals in the air can: Repeat the process for the air can, ensuring a snug fit.

Step 4: Add Washers and Quad Ring on Air Shaft

• Install backup washer: Place the backup washer over the air shaft.
• Position quad ring: Slide the quad ring onto the air shaft, ensuring it is properly seated.

Step 5: Add Washers and Quad Ring on Air Can

• Repeat for air can: Just like the previous step, add a backup washer and quad ring to the air can.
• Ensure proper placement: Use a finger to hold the washer in place as you manipulate it into position, ensuring it is evenly seated.

Step 6: Reassemble the Shock

• Align the components: Carefully align the air can with the shock body.
• Screw together: Hand-tighten the air can onto the shock body, making sure it’s secure but not over-tightened.

Step 7: Add Air

• Reinflate the shock: Use an air pump to add air to the shock, following the manufacturer's recommended pressure settings.
• Cycle the shock: Actuate the shock a few times to ensure proper air distribution and functionality.

Conclusion

Servicing your Fox Shox rear shock is a manageable task that can greatly improve your bike's performance. By following these steps, you ensure that your shock operates smoothly and effectively. If you encounter any issues or are unsure about any part of the process, refer to the specific model documentation or consider consulting a professional. Happy riding!