Rebuilding your Mattoc Pro [paid link] suspension fork is an essential maintenance task that helps keep your bike’s suspension system performing optimally. Whether you’re troubleshooting poor suspension performance, dealing with unwanted noises, or just performing regular upkeep, this guide walks you through each step to ensure your fork is in top condition.
Tools Required
Before you begin, gather all the necessary tools to carry out the rebuild. These tools will help you disassemble, clean, inspect, and reassemble the fork efficiently.
- 10mm and 15mm open-end wrenches
- Torque wrench [paid link]
- Allen wrenches [paid link] (specific sizes depend on your fork)
- Suspension oil (refer to manufacturer specifications)
- Syringe (for suspension oil)
- Cleaning rags
- Fork seal driver tool
- Soft mallet or hammer (for use with fork seal driver)
- 5mm and 8mm socket wrenches
- Compression and rebound adjustment tool (if required)
- Fork oil bath tray
- Brake cleaner
- Silicone grease
- Replacement seals and O-rings (if needed)
Disassembling the Mattoc Pro Suspension Fork
Step 1: Remove the Fork from the Bike
Begin by detaching the fork from the bike frame. Use the 15mm open-end wrench to loosen the quick release or through-axle, depending on your bike’s setup. Once the axle is removed, carefully lift the fork from the frame.
Step 2: Remove the Front Wheel and Brake Components
Next, remove the front wheel to give yourself ample workspace. If your bike’s brake system requires it, disconnect the brake hose or remove the brake caliper. Make sure to secure the brake components to avoid damage while you work on the fork.
Step 3: Drain the Suspension Fluid
With the fork in an upright position, remove the air valve cap to release any internal pressure. Then, place a drain pan beneath the fork to catch any residual suspension fluid. Gently compress the fork to help expel any remaining oil from the damper and air spring.
Step 4: Remove the Top Cap and Stem
Using a 5mm Allen wrench [paid link], unscrew the top cap of the fork. This will give you access to the damper and air spring components inside the fork. Place the cap and any other small parts in a safe location for reassembly.
Step 5: Remove the Damper Cartridge
After removing the top cap, the damper cartridge will be exposed. Use the appropriate tool to carefully extract the damper from the fork legs. Place it in a clean container to prevent contamination.
Step 6: Remove the Air Spring Assembly
Once the damper is removed, proceed to take out the air spring assembly. Carefully disassemble the air spring, using the proper tools, and inspect it for damage. Clean all parts thoroughly, paying special attention to seals and O-rings.
Cleaning and Inspecting Components
Step 7: Clean the Fork Components
Use a brake cleaner or suspension-specific cleaner to clean all the fork components, including the dust seals, oil seals, and stanchions. Wipe away any debris or old grease using a soft rag.
Step 8: Inspect Seals and O-rings
Check all seals and O-rings for wear and tear. Damaged seals can lead to poor fork performance, so replace any that show signs of wear. Leaking seals will negatively impact the fork’s ability to function properly, so this step is crucial for the rebuild’s success.
Step 9: Inspect the Damper and Air Spring
Examine both the damper and air spring for signs of damage, such as cracks, oil leaks, or worn components. Ensure that the piston rods are moving freely, and the damper is operating smoothly. If the damper is compromised, consider replacing it or following the manufacturer’s service procedures.
Rebuilding the Mattoc Pro Suspension Fork
Step 10: Lubricate and Reassemble the Fork
Apply a thin layer of suspension grease or silicone grease to all moving parts, such as the stanchions, seals, and damper. This will reduce friction and improve the longevity of the fork. Carefully reassemble the air spring and damper in the reverse order of disassembly, making sure to tighten everything to the manufacturer’s torque specifications.
Step 11: Reinstall the Damper Cartridge
Carefully reinstall the damper cartridge into the fork. Ensure it is properly aligned and seated. Torque the damper cartridge according to the manufacturer’s specifications to avoid leaks or performance issues.
Step 12: Install the Air Spring
After the damper is securely in place, install the air spring assembly. Lubricate the parts as needed and ensure the air spring is correctly seated. Use a torque wrench [paid link] to tighten any necessary bolts to the recommended settings.
Step 13: Install New Seals
If you have replaced the seals and O-rings, carefully install them now. Use a fork seal driver tool to press the seals into place evenly. Make sure there are no particles or debris under the seals that could hinder their proper function.
Adding Suspension Fluid
Step 14: Add Suspension Oil
Refill the fork with the correct suspension oil as per the manufacturer’s specifications. Using a syringe, carefully pour the oil into both the damper and the air spring. Ensure the oil levels are within the recommended range for optimal performance.
Step 15: Bleed the Fork
For certain models, you may need to bleed the fork after adding oil to remove any air bubbles that could compromise the suspension’s performance. Follow the manufacturer’s bleeding procedure to ensure the fork is properly pressurized.
Testing and Final Adjustments
Step 16: Reinstall the Fork and Test
Reinstall the fork back onto the bike, reconnecting the brake components if necessary. Tighten all bolts to the specified torque settings. Test the fork’s compression and rebound settings to ensure everything is working as expected.
Step 17: Fine-Tune Compression and Rebound Settings
Adjust the compression and rebound settings based on your riding style, weight, and trail conditions. Refer to the owner’s manual for the manufacturer’s recommended settings. These adjustments will ensure that your fork performs optimally under different riding conditions.
Troubleshooting Common Issues
1. Fork Not Compressing Properly
If your fork feels too stiff or doesn’t compress as expected, check the oil levels in the air spring. Low oil levels can cause stiffness. Also, make sure the air pressure is correct. Ensure that the seals are intact and that the damper is functioning as expected.
2. Excessive Noises During Suspension Travel
Noises such as squeaks or clicks are often due to dirt buildup or damaged seals. Inspect the fork for dirt or debris and replace any damaged seals. Clean the fork thoroughly to prevent further issues.
3. Fork Not Returning to Full Extension
If your fork isn’t extending fully, it could be due to a hydraulic lockout issue or an imbalance in air pressure. Verify that the lockout is functioning properly, and ensure that the air spring is correctly inflated.
Customizing and Optimizing Your Mattoc Pro Suspension Fork
To optimize your Mattoc Pro [paid link] suspension fork for your riding style and preferences, consider the following:
- Tune the Compression and Rebound Damping: Adjust these settings based on your weight, riding style, and the trail conditions you typically encounter. Faster rebound is better for smoother trails, while slower rebound and firmer compression are ideal for aggressive riding.
- Adjust the Air Spring Pressure: The correct air pressure will depend on your weight and riding style. A stiffer air spring suits aggressive riding, while a softer air spring offers more comfort for casual or trail riding.
- Upgrade Seals and Oil: Upgrading to high-quality seals and suspension oil can significantly enhance the fork’s performance and lifespan.
Compatibility with Other Drivetrain Components
The Mattoc Pro suspension fork is compatible with most modern drivetrain components. However, it is essential to confirm that the axle type and dropout dimensions match your bike frame. Also, check that your brake caliper mounts are compatible with the fork’s post-mount or IS-mount brake system to avoid compatibility issues.
By following these steps, you’ll ensure that your Mattoc Pro suspension fork remains in excellent working condition, providing you with smooth and reliable suspension performance on every ride.