Introduction

The Öhlins TTX1Air rear shock is a highly regarded suspension component known for its performance and precision. Regular maintenance is crucial to ensure that your TTX1Air rear shock continues to perform at its best, and one of the most important maintenance tasks is an oil change. Changing the oil inside the shock helps maintain optimal damping performance, prevent internal wear, and prolong the lifespan of the shock. This guide will provide you with a detailed, step-by-step process for changing the oil in your Öhlins TTX1Air rear shock.

Tools Required

• Öhlins TTX1Air service kit
• 10mm wrench
• Torque wrench [paid link] (for accurate tightening)
• Shock pump
• Oil drain pan
• 3mm, 4mm, and 5mm hex wrenches
• Rubber gloves
• Isopropyl alcohol (for cleaning)
• Small brushes or rags
• Fine-tipped syringe or oil injector

Preparing the TTX1Air Rear Shock for Oil Change

Before starting the oil change, ensure that you have the correct Öhlins TTX1Air service kit that matches the model and specifications of your shock. This kit will contain the required tools and oil specific to the TTX1Air.

1. Remove the rear shock from the bike:
   • Start by removing the shock from the bike frame. Use a 10mm wrench to loosen and remove the mounting bolts that secure the shock to the frame and linkage.
   • Place the shock on a clean surface, ensuring the shock is positioned vertically to prevent any oil spills.
2. Ensure safety precautions:
   • Wear rubber gloves to protect your hands from oil and dirt. Ensure the work area is clean to avoid contamination during the oil change process.

Step 1: Disassembling the TTX1Air Rear Shock

1. Loosen the air chamber:
   • Use a 3mm hex wrench to remove the air valve cap.
   • Attach the shock pump to the valve and release all air pressure in the shock. It’s crucial to ensure the shock is fully depressurized before proceeding.
2. Remove the reservoir cap:
   • Use the appropriate tool from the Öhlins TTX1Air service kit to remove the reservoir cap. This will expose the shock’s internal components, including the damper oil.
   • Take note of the torque setting for reassembly later.
3. Drain the oil:
   • Position the shock in a drain pan. Carefully remove the damper cartridge or the main body, depending on the shock configuration.
   • Allow the oil to fully drain from the shock. It’s a good idea to inspect the oil for any signs of contamination or excessive wear, which could indicate the need for further service.

Step 2: Cleaning and Inspection

1. Clean the shock body:
   • Use isopropyl alcohol and a clean rag to wipe down the shock body and remove any dirt or debris.
   • Inspect the shock for any visible damage, such as dents or cracks, which could compromise its performance. If any damage is found, contact an authorized service center for repairs.
2. Inspect internal components:
   • Check the piston, seals, and oil reservoir for wear or degradation. Replace any parts that show signs of wear, such as torn seals or scratched piston surfaces.

Step 3: Refilling with New Oil

1. Choose the correct oil:
   • Use the Öhlins recommended shock oil for the TTX1Air. This oil is designed to match the specific damping characteristics and temperature range of the shock.
2. Reassemble the shock components:
   • Carefully refill the shock with new oil using a syringe or oil injector. Ensure the correct amount of oil is added as per the Öhlins specifications for the TTX1Air.
   • Gently tap the shock body to remove any air bubbles trapped in the oil.
3. Seal the shock reservoir:
   • Once the oil is filled, reattach the reservoir cap. Tighten the cap securely, following the manufacturer’s torque specifications to avoid over-tightening.

Step 4: Reinstallation and Pressure Adjustment

1. Reinstall the shock:
   • Place the shock back onto the frame and secure it with the mounting bolts.
   • Tighten the bolts to the recommended torque specification, ensuring that the shock is securely mounted.
2. Inflate the air chamber:
   • Use the shock pump to inflate the air chamber to the recommended pressure. This pressure will vary depending on the rider’s weight and riding style. Consult the Öhlins manual for the correct air pressure settings.
3. Check for leaks:
   • After reinstallation, check for any oil or air leaks around the shock seals and reservoir cap. If you notice any leakage, recheck the torque on the reservoir cap and mounting bolts.
4. Perform a test ride:
   • Once the shock is reinstalled and properly pressurized, take the bike for a short test ride to check the suspension’s performance. Ensure the shock is functioning smoothly, with no signs of unusual noise or movement. If the shock feels inconsistent, further adjustments or professional servicing may be required.

Step 5: Troubleshooting Common Oil Change Issues

• Air bubbles in the oil: If you notice air bubbles in the oil after refilling, gently tap the shock body to encourage the bubbles to rise and escape. Ensure the oil is filled to the proper level, and avoid overfilling.
• Difficulty in reaching correct air pressure: If the shock is not reaching the correct air pressure, check the seals for damage or wear. A worn seal can lead to air leakage, preventing the shock from maintaining the correct pressure.
• Shock feels spongy or unresponsive: If the shock feels unresponsive after the oil change, ensure that the correct oil has been used and that the oil level is appropriate. Additionally, check the air pressure settings to make sure they are aligned with the rider’s specifications.

Step 6: Customization and Optimization

1. Fine-tuning air pressure:
   • For riders seeking the best performance, fine-tune the air pressure in the TTX1Air based on your riding style and terrain. Lighter riders may need slightly less pressure, while heavier riders may require more to achieve the desired sag and responsiveness.
2. Adjusting damping settings:
   • The TTX1Air offers various compression and rebound adjustments to fine-tune the shock’s performance. Experiment with these settings based on the terrain and personal preference. Make small adjustments and test ride frequently to achieve the ideal balance.
3. Maintaining optimal performance:
   • Regular oil changes, especially if the bike is ridden in harsh conditions, are essential for maintaining performance. Consistently check the shock for any signs of wear, and always replace worn seals or damaged parts promptly to avoid compromising performance.

Conclusion

Performing an oil change on the Öhlins TTX1Air rear shock is a straightforward but crucial maintenance task that ensures the shock’s longevity and performance. By following these steps and using the appropriate tools and oil, you can keep your TTX1Air performing optimally for longer periods, ensuring a smooth and responsive ride. Regular oil changes, along with periodic inspections, are essential for anyone looking to get the most out of their suspension system.