How to Service Your Van RC Performance Rear Shock Without a Mechanic

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The Fox Van RC Performance [paid link] rear shock is a durable and high-performing shock designed for aggressive riders. Over time, this shock requires maintenance to ensure optimal performance. Regular servicing can extend the lifespan of the shock and maintain its excellent handling. This guide provides a comprehensive, step-by-step breakdown of how to service your Fox Van RC Performance [paid link] rear shock without the help of a mechanic. It covers everything from disassembly to reassembly, adjustment, and troubleshooting common issues.

Tools Required

  • 3mm, 4mm, 5mm, and 8mm hex wrenches
  • Shock pump
  • Shock fluid (Fox recommended)
  • Oil drain pan
  • Clean rag or towel
  • Fork oil (for damper servicing)
  • Suspension grease
  • T25 Torx wrench [paid link]
  • A torque wrench [paid link]
  • Spanner wrench (for spring removal)
  • Plastic container (for oil collection)
  • Latex gloves (optional for cleanliness)

Preparing for the Service

Before you begin, ensure you have a clean, stable work area where the rear shock can be removed from the bike. Additionally, gather all the necessary tools listed above to avoid interruptions during the service process.

Step 1: Removing the Shock from the Bike

To start servicing your Fox Van RC Performance rear shock, you first need to remove it from your bike. Follow these steps carefully:

  1. Release the spring: Use a spanner wrench to remove the coil spring from the shock. This may require loosening the preload adjuster and backing off the compression knob, depending on your shock model.
  2. Detach the shock: Use the appropriate hex wrench (usually 8mm) to remove the mounting bolts that secure the shock to the frame. Keep the bolts in a safe location as you will need them for reinstallation.

Step 2: Cleaning the Shock

Before disassembling the shock, it’s crucial to clean it to prevent dirt from contaminating the internal components.

  1. Wipe down the shock: Use a clean rag to wipe down the external parts of the shock, removing any dirt or debris.
  2. Inspect the shock: Check the shock for any visible damage or leaks. If the shock body is scratched or bent, further repairs or a replacement may be necessary.

Step 3: Disassembling the Shock

The next step involves opening up the shock to access the internal components for cleaning, oil change, and servicing.

  1. Remove the shock’s air sleeve: Using a 4mm hex wrench, carefully remove the screws securing the air sleeve. Slide the air sleeve off, exposing the inner components of the shock.
  2. Drain the old oil: Pour the used shock fluid into a plastic container, ensuring that all the fluid is drained. This will prepare the shock for fresh fluid, which is essential for maintaining its damping performance.

Step 4: Inspecting and Cleaning Internal Components

With the shock disassembled, inspect and clean the internal components carefully.

  1. Check the damper and seals: Look for any signs of wear or damage to the seals, shafts, or dampers. If you notice significant wear, it may be time to replace these components.
  2. Clean the damper rod: Use a clean rag to wipe down the damper rod and internal shafts. Avoid using harsh chemicals that could damage the seals or other components.

Step 5: Replacing Oil and Reassembling the Shock

Once the shock components are cleaned, it’s time to reassemble and refill the shock with new oil.

  1. Lubricate the seals: Before installing the air sleeve, apply suspension grease to the seals. This step helps maintain the seal integrity and prevents future leaks.
  2. Refill with fresh oil: Use the recommended Fox suspension oil for the damping system. Fill the shock with oil up to the specified level, as indicated in the owner’s manual.
  3. Reassemble the shock: Slide the air sleeve back over the damper and secure it with the screws. Ensure everything is tightened properly to avoid air leaks.

Step 6: Reinstalling the Shock on Your Bike

With the shock reassembled, it’s time to put it back on your bike.

  1. Attach the shock: Place the shock back into its mounts on the frame. Tighten the mounting bolts securely but be careful not to overtighten them, as this could damage the frame or the shock.
  2. Reinstall the coil spring: Reattach the coil spring to the shock using the spanner wrench. Adjust the preload to your preferred setting, ensuring it’s properly secured.

Step 7: Setting the Sag and Adjusting the Shock

After reinstalling the shock, it’s essential to adjust it for optimal performance. Setting the correct sag is critical to ensure the shock performs as expected.

  1. Check the sag: Use a shock pump to inflate the shock to your desired pressure. With the rider’s weight applied, measure the amount the shock compresses. The recommended sag is usually around 30% of the shock’s total travel, but refer to the manual for your specific model.
  2. Adjust compression and rebound: Once the sag is set, fine-tune the compression and rebound settings. Start with the middle settings and adjust based on your riding style and terrain. Test ride the bike to assess comfort and responsiveness.

Step 8: Troubleshooting Common Issues

Even with regular maintenance, you might encounter some issues with the Fox Van RC Performance rear shock. Here are some common problems and how to fix them.

Problem: Poor Rebound Performance

If the shock rebounds too slowly or too quickly, you may need to adjust the rebound knob. It controls the shock’s ability to return after compression, and improper settings can affect ride quality.

Solution: Turn the rebound knob clockwise to slow down the rebound or counterclockwise to speed it up. Make small adjustments and test ride the bike until you achieve a smooth, controlled rebound.

Problem: Air Leaks

If you notice a loss of air pressure, there could be an issue with the air sleeve or seals.

Solution: Inspect the seals for damage. If they are worn or cracked, replace them with new seals. Make sure the air sleeve is properly seated and the bolts are tightened to the correct torque.

Problem: Inconsistent Damping

If you feel that the shock is not offering consistent damping, it could be due to oil contamination or air inside the system.

Solution: Reopen the shock, drain the oil, and check for any contamination. Refill the shock with fresh oil and ensure there are no air pockets in the system before reassembling it.

Step 9: Testing and Fine-Tuning

Once all adjustments have been made, take the bike out for a test ride to check the performance of the shock. Fine-tune the compression, rebound, and air pressure settings based on your riding preferences.

Conclusion

Servicing the Fox Van RC Performance rear shock is a manageable task with the right tools and knowledge. Regular maintenance not only enhances the shock’s performance but also extends its lifespan. By following the steps outlined in this guide, you can ensure your rear shock continues to provide a smooth and responsive ride, without the need for a mechanic.