The Fox Van RC Performance [paid link] rear shock is known for its durability and smooth performance, making it a popular choice among riders looking for a high-quality shock for their mountain bikes. Like all suspension components, the Van RC Performance [paid link] rear shock requires regular maintenance to ensure it continues to perform at its best. One of the most crucial maintenance tasks is the oil change, which keeps the shock working efficiently and prevents issues such as reduced responsiveness and internal wear. In this guide, we’ll walk you through the detailed process of changing the rear shock oil for your Van RC Performance model.
Tools Required
- Fox Rear Shock Seal Head Tool
- 5mm Hex Wrench
- Torque Wrench [paid link]
- 8mm Wrench
- Fox Suspension Oil (specifically recommended for Van RC Performance)
- Clean Workbench or Surface
- Oil Drain Pan
- Cleaning Cloth
- New Seals (if needed)
- Silicone Grease
- Syringe (for oil refilling)
- 3mm Allen Key
- 10mm Socket Wrench
- Suspension Pump (for shock pressure adjustment)
Preparing for the Oil Change
Before diving into the oil change procedure, it’s important to set up a clean workspace and gather all necessary tools. This ensures that the process runs smoothly without interruptions. The Fox Van RC Performance rear shock requires a careful approach, and having everything organized will help prevent damage to components.
- Remove the Rear Shock
Start by removing the rear shock from the bike. Use a 5mm hex wrench to undo the bolts at both ends of the shock. Place the shock on a clean surface once it’s removed, ensuring there is no dirt or debris that could potentially cause damage during the service. - Place the Shock on a Clean Surface
It is crucial to work in a clean environment to avoid contamination inside the shock. Lay down a clean towel or cloth to rest the shock on during the oil change.
Disassembling the Rear Shock
The next step is to carefully disassemble the shock in order to access the internal oil. You will need to remove the shock’s top and bottom caps to drain the old oil.
- Loosen the Top Cap
Using the Fox Rear Shock Seal Head Tool, loosen and remove the top cap of the shock. Be cautious not to damage the cap or seal while removing it. - Remove the Air Canister
Use a 3mm Allen key to remove the bolts securing the air canister to the body of the shock. Once these are loosened, gently pull off the canister. Set it aside, making sure that no oil or debris enters the air canister’s interior. - Drain the Oil
Place the shock in a position where the oil can drain easily. Allow the old oil to drain completely. You can use a clean oil drain pan to collect the oil. This step is crucial, as it ensures that all the old fluid is removed, leaving space for the fresh oil. - Clean the Internal Parts
Once the oil has drained, use a clean cloth to wipe down the interior components of the shock, including the damper body and other areas that have come in contact with oil. Make sure no debris or dirt is left inside, as it could interfere with the shock’s performance.
Reassembly of the Shock
Now that the shock has been fully drained and cleaned, it’s time to reassemble it and refill it with fresh oil.
- Install New Seals (If Necessary)
If you notice any damage or wear on the seals during the disassembly, it’s best to replace them before proceeding. Apply a thin layer of silicone grease to the new seals to ensure smooth installation and proper sealing. - Refill with Fresh Oil
Using a syringe, carefully refill the shock with the recommended Fox suspension oil. Make sure to use the correct oil for the Van RC Performance model. Overfilling or underfilling could affect the performance of the shock, so follow the manufacturer’s guidelines closely. - Reinstall the Air Canister
After filling the shock with the proper amount of oil, reinstall the air canister and secure it in place with the 3mm Allen bolts you removed earlier. Ensure the air canister is aligned correctly to avoid leaks. - Install the Top Cap
Once the oil is in place and the air canister is secured, install the top cap back onto the shock. Use the Fox Rear Shock Seal Head Tool to tighten the cap to the manufacturer’s recommended torque settings. This step is essential to ensure proper sealing and prevent air leakage.
Setting the Air Pressure
Once the oil has been changed and the shock is reassembled, it’s time to adjust the air pressure to your desired level. This is critical to achieve the correct shock performance.
- Attach the Suspension Pump
Connect your suspension pump to the air valve on the shock. Be sure to use a high-quality pump that is compatible with your shock. If your pump has a pressure gauge, it will help you achieve precise pressure adjustments. - Adjust the Air Pressure
Inflate the shock to the manufacturer’s recommended air pressure. The correct pressure depends on your weight, riding style, and the specific needs of your bike. Check the pressure gauge frequently to ensure accuracy. - Check for Leaks
After adjusting the pressure, inspect the shock for any signs of air leaks. If you notice any, recheck the seals and top cap to ensure everything is properly tightened and sealed.
Final Inspection and Reinstallation
After completing the oil change and setting the air pressure, it’s time to perform a final inspection and reinstall the shock on your bike.
- Inspect the Shock for Proper Function
Check the shock for any signs of improper assembly or functionality. Cycle the shock through its travel by pressing down on the rear end of the bike or by manually compressing the shock. Ensure it moves smoothly and without resistance. - Reinstall the Shock on the Bike
Once you are satisfied with the shock’s performance, reinstall it onto your bike. Secure the shock with the bolts removed during the disassembly step. Tighten these bolts to the manufacturer’s recommended torque specifications to ensure proper installation and performance.
Troubleshooting Common Issues
While performing the oil change, you might encounter a few common issues. Here’s a quick troubleshooting guide to help resolve them:
- Shock Not Compressing Smoothly
If the shock is not compressing smoothly, it may indicate that the oil has not been properly refilled or the seals are not correctly installed. Double-check your work and make sure the shock is properly assembled. - Air Leaks
If you notice air leaks after the oil change, ensure the top cap and seals are correctly tightened. If the leak persists, inspect the air canister for damage. - Excessive Oil Draining
If too much oil drained out during disassembly, it might indicate overfilling during the previous service. Be cautious when filling the shock, ensuring that you follow the oil capacity instructions closely.
Conclusion
Regular maintenance of the Fox Van RC Performance rear shock is crucial to keeping it performing optimally and extending its lifespan. The oil change procedure is a simple yet important task that every rider should learn to do themselves. By following this step-by-step guide, you ensure your shock remains in top condition, providing consistent performance and comfort on the trails.