Step-by-Step Rear Shock Oil Change for Topaz T3Air

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Maintaining the rear shock of your DVO Topaz T3Air is crucial for optimal performance, comfort, and longevity of your bike. Over time, shock oil degrades and contaminants can accumulate, affecting its responsiveness. This guide provides detailed, step-by-step instructions on how to change the oil in your Topaz T3Air rear shock, ensuring it continues to perform at its best.

Tools Required

  • 8mm Hex Wrench
  • 24mm and 17mm Wrenches
  • 5mm Hex Wrench
  • Shock Pump
  • Torque Wrench [paid link]
  • Oil Drain Pan
  • Gloves
  • Paper Towels or Rags
  • DVO Topaz T3Air Oil (specific oil recommended by DVO)
  • Needle Nose Pliers
  • Clean Work Surface

Preparing the Rear Shock for Oil Change

Before beginning the oil change, it is important to properly prepare the shock and your workspace. This ensures safety and prevents damage to the components.

  1. Remove the Rear Shock from the Bike:
    • Use an 8mm hex wrench to remove the bolts securing the shock to the frame. Carefully remove the shock from the bike, placing it on a clean, stable surface.
  2. Protect the Shock:
    • To prevent contamination during the disassembly process, wrap the shock in a clean towel or place it in a secure spot where dirt and grime can’t reach it.
  3. Set Up Your Workspace:
    • Ensure you have enough space to perform the disassembly, cleaning, and reassembly steps. Lay out paper towels or rags to catch any oil and to keep your tools and components clean.

Disassembling the Topaz T3Air Rear Shock

Disassembling the Topaz T3Air shock requires careful attention to detail to prevent damaging any internal components.

  1. Remove the Air Sleeve:
    • Use the 24mm wrench to loosen and remove the air sleeve from the shock body. The air sleeve is the outer casing where the shock’s air chamber is housed.
  2. Drain Old Shock Oil:
    • Position the shock oil drain pan beneath the shock. Remove the Schrader valve cap using a 5mm hex wrench. Allow the oil to fully drain from the shock by tilting it, making sure to catch all the fluid.
  3. Remove the Damper Assembly:
    • Once the oil is drained, remove the damper assembly from the shock body. Use the 17mm wrench to carefully remove any additional bolts securing the damper. This will allow you to access the internal shock components.
  4. Inspect the Internal Components:
    • Examine the damper assembly, seals, and other internal parts for wear, damage, or contamination. If any parts appear worn out, they may need to be replaced before proceeding with the oil change.

Cleaning and Maintenance of Internal Components

After disassembling the shock, it is essential to clean all the internal parts to remove old oil, dirt, or debris.

  1. Clean the Shock Body:
    • Using a clean rag or towel, wipe down the inside of the shock body to remove any remaining oil or dirt. Make sure to thoroughly clean all nooks and crannies, as this will ensure smooth operation once the shock is reassembled.
  2. Inspect and Replace Seals if Necessary:
    • Check all seals for any signs of wear or damage. Replace any worn seals to maintain optimal performance and prevent air or oil leakage during operation.
  3. Check the Piston and Shaft:
    • Inspect the shock’s piston and shaft for damage or scoring. If either component is damaged, it may require replacement to ensure smooth damping performance.

Refilling the Shock with Fresh Oil

Now that the shock components are clean and ready, it’s time to refill the shock with fresh oil.

  1. Select the Correct Oil:
    • Use DVO’s recommended oil for the Topaz T3Air model. Ensure that you are using the correct type and amount of oil as specified in the manufacturer’s instructions.
  2. Fill the Shock Body with Oil:
    • Slowly fill the shock body with the new shock oil. Be sure to avoid overfilling, as this can lead to poor suspension performance. The recommended oil level is specified by DVO for each specific shock.
  3. Reinstall the Damper Assembly:
    • Carefully reinstall the damper assembly into the shock body. Be sure to align it correctly before tightening it back in place using the 17mm wrench. Torque it to the recommended specification to ensure a secure fit.

Reassembling the Rear Shock

After ensuring the internal components are clean and properly filled with fresh oil, you can proceed with reassembling the shock.

  1. Reinstall the Air Sleeve:
    • Place the air sleeve back onto the shock body, ensuring it is seated correctly. Tighten the 24mm nut with your wrench, but be careful not to over-torque it, as this could cause damage to the air sleeve or shock body.
  2. Reinstall the Schrader Valve:
    • Use the 5mm hex wrench to reinstall the Schrader valve, ensuring it is properly tightened. This valve is important for setting the correct air pressure in the shock.
  3. Check for Leaks:
    • Before mounting the shock back on the bike, check for any signs of oil or air leakage. This can be done by slowly pressing the shock and ensuring there is no unwanted movement of air or oil escaping from the seals.

Reinstalling the Rear Shock on the Bike

With the shock fully reassembled and checked for leaks, you are ready to reinstall it on your bike.

  1. Reattach the Shock to the Frame:
    • Align the shock with its mounting points on the bike frame. Use your 8mm hex wrench to secure the shock in place with the appropriate bolts. Make sure the shock is aligned properly before tightening the bolts to avoid stressing the shock body.
  2. Set the Correct Air Pressure:
    • Using a shock pump, set the air pressure to the recommended settings for your rider weight and riding style. The correct air pressure ensures proper suspension performance and helps prevent bottoming out during aggressive riding.
  3. Test the Shock:
    • Once the shock is installed, give it a few test compressions to ensure smooth movement and proper damping. Check that everything is functioning correctly, and verify that the shock does not make any unusual noises.

Troubleshooting Common Issues After an Oil Change

After an oil change, you may encounter some common issues that can affect the performance of your Topaz T3Air rear shock. Here are a few things to check if you notice any problems:

  1. Shock Not Rebounding Correctly:
    • Ensure that the oil has been filled to the correct level. If the shock is slow to rebound or not rebounding at all, there may be an issue with the oil level, air pressure, or damping circuit.
  2. Leaking Oil:
    • If you notice oil leaking around the seals, inspect them for damage and replace them if necessary. Leaking oil can severely affect shock performance and may cause the shock to fail prematurely.
  3. Unusual Noises:
    • If you hear any grinding or squeaking sounds during shock compression or rebound, it could indicate an issue with the internal components, such as the piston or shaft. Inspect these parts for wear and replace them if needed.

Conclusion

Performing a rear shock oil change on your DVO Topaz T3Air is essential for maintaining its performance and longevity. By following the steps outlined in this guide, you can ensure that your shock operates at peak performance, providing a smooth and controlled ride. Regular oil changes, along with proper maintenance, will keep your shock functioning smoothly and contribute to an enhanced riding experience.