The TTXAir 2.1 rear shock from Öhlins is known for its exceptional performance, offering riders a smooth and controlled ride. However, like any high-performance component, regular servicing is essential for maintaining its optimal function. This guide will walk you through the process of servicing your TTXAir 2.1 rear shock without the need for a professional mechanic. With the right tools and knowledge, you can keep your rear shock in excellent condition and ensure it continues to perform at its best.
Tools Required
- Öhlins TTXAir 2.1 service kit
- Torque wrenches (appropriate for the shock bolts)
- Shock pump (compatible with the TTXAir 2.1)
- Clean rags
- Isopropyl alcohol or shock cleaner
- 10mm and 14mm spanners
- Plastic pry tool
- Oil catch basin
- Nitrogen cylinder (for recharging air chamber)
- Safety goggles and gloves
Preparing for the Service
Before diving into the servicing process, ensure that your bike is stable and properly secured. You will need access to your rear shock, so lifting the bike or using a repair stand is recommended. Place the bike on a level surface and remove the rear wheel for better access. Have the necessary tools and cleaning supplies within arm’s reach for a smooth service.
Cleaning the Rear Shock
Proper cleaning is the first step in any shock service. Dirt and debris can cause internal damage or compromise performance. Use a clean rag soaked with isopropyl alcohol or a specific shock cleaner to wipe down the shock’s exterior. Pay special attention to the seals and the area around the air valve to prevent contamination.
Removing the Rear Shock
To remove the TTXAir 2.1 rear shock, follow these steps:
- Loosen the shock bolts: Use a 10mm or 14mm spanner, depending on the bolt size on your specific setup. Remove the bolts that attach the shock to the frame and carefully slide the shock off the mounting points.
- Set the shock aside: Once detached, place the shock on a clean surface, ensuring the shock is not subject to any unnecessary pressure or movement.
Servicing the TTXAir 2.1 Rear Shock
Now that the shock is removed, you can begin the service process. The TTXAir 2.1 consists of multiple parts, each requiring specific care. Here’s a step-by-step guide on how to handle each area.
Air Spring Chamber Maintenance
The air spring is a crucial component for setting up your rear shock’s suspension feel. Over time, air pressure can fluctuate or degrade, which affects the shock’s performance.
- Release the air pressure: Use the shock pump to slowly release any remaining air pressure from the air spring chamber. Always wear safety goggles and gloves during this step to prevent accidents.
- Inspect the air valve: Carefully check the air valve for any signs of wear, dirt, or damage. If necessary, replace the valve core or clean it with a small, soft brush.
- Reinflate and adjust pressure: Using the shock pump, refill the air spring with the recommended pressure, typically printed on the shock body or in the user manual. If you are unsure of the correct pressure, refer to the bike’s manufacturer specifications based on rider weight and riding style.
Rebuilding the Damper Cartridge
The damper cartridge controls the compression and rebound damping of the shock. Regular servicing of the damper ensures smooth operation and helps prevent performance degradation.
- Remove the damper assembly: Carefully use the plastic pry tool to detach the damper cartridge from the shock body. Be cautious not to damage the internal seals.
- Inspect the damper seals: Check for any visible wear or damage to the seals. If seals appear compromised, replace them using the Öhlins service kit.
- Disassemble the damper: Use the appropriate tools from the service kit to carefully disassemble the damper. Keep track of all the components and their positions for reassembly.
- Clean the parts: Use isopropyl alcohol to clean all internal components of the damper. Wipe away old oil, dirt, and debris. Allow the parts to dry completely.
- Reassemble the damper: After cleaning, lubricate the seals and parts with fresh oil, and reassemble the damper. Ensure all components are correctly aligned and securely fastened.
Oil Change
Changing the internal oil is an important step in maintaining proper damping and longevity of the shock.
- Drain the old oil: Position the shock over an oil catch basin and allow the old oil to drain completely. This will prevent contamination when you refill the shock.
- Clean the oil reservoir: After draining, clean the oil reservoir with a clean rag to remove any leftover debris or residue.
- Refill with new oil: Use the specific oil recommended by Öhlins for the TTXAir 2.1. Fill the reservoir with the correct amount of oil, ensuring the level is precise. Refer to the user manual for the correct oil volume.
Reassembling the Shock
Once the air spring and damper cartridge have been serviced, it’s time to reassemble the shock.
- Reinsert the damper cartridge: Carefully place the damper back into the shock body. Ensure that the cartridge is aligned properly with the air spring chamber.
- Tighten the components: Use the torque wrench [paid link] to tighten the components to the specified torque values found in the user manual. Be precise during this step to avoid damaging the shock.
Reinstalling the TTXAir 2.1 Rear Shock
After the shock has been fully serviced, it’s time to reinstall it onto the bike.
- Position the shock: Carefully slide the shock back into its mounting points on the bike’s frame.
- Reattach the shock bolts: Use the appropriate spanner to tighten the shock bolts. Always torque the bolts to the recommended specifications to ensure proper security.
- Inflate the air spring: Reinflate the air spring to the desired pressure, using a shock pump to ensure accuracy.
Troubleshooting Common Set-Up Issues
If you experience issues with your TTXAir 2.1 after servicing it, here are a few common problems and their solutions:
Air Spring Pressure Fluctuations
If the air spring pressure fluctuates or does not hold pressure:
- Check the air valve for leaks and ensure it is properly sealed.
- Inspect the Schrader valve for damage or contamination and replace if necessary.
Poor Rebound Performance
If the rebound feels too fast or too slow after servicing:
- Ensure that the damper assembly has been correctly reassembled and that the seals are in good condition.
- Double-check the oil levels and ensure they are filled to the correct amount.
Noise from the Shock
If you hear unusual noise from the shock during use:
- Inspect all the mounting bolts to ensure they are tightened properly.
- Check for any dirt or debris around the seals that could be causing friction.
Customization and Optimization for Better Performance
To further optimize the TTXAir 2.1 rear shock for your specific needs, consider the following customization options:
- Adjust the air pressure: Based on your riding style, adjust the air pressure to suit your preferences for comfort and control.
- Rebound and compression settings: Fine-tune the rebound and compression settings to achieve a balanced, responsive ride. Experiment with different settings to find the optimal damping for your riding conditions.
- Upgrading seals and oils: Using higher-quality seals and oils can help improve the shock’s performance and longevity, especially if you ride in demanding conditions.
Understanding Compatibility with Other Drivetrain Components
When servicing or upgrading your TTXAir 2.1 rear shock, it’s important to ensure compatibility with your other drivetrain components. Make sure the shock matches your bike’s geometry and suspension system. Additionally, confirm that your suspension linkage and frame can accommodate the shock’s specifications, such as the shock length and stroke.
By following this guide, you can keep your TTXAir 2.1 rear shock performing at its peak without the need for a mechanic. Regular maintenance, proper adjustments, and attention to detail will ensure your rear shock continues to deliver a smooth and responsive ride for years to come.