The Fox 34 AWL suspension fork is engineered for rugged trail and all-weather use, designed to provide consistent damping performance in a variety of riding conditions. However, like any precision component, it may encounter issues over time due to wear, improper setup, or environmental factors. This guide outlines how to identify and resolve the most frequent issues affecting the Fox 34 AWL fork, ensuring optimal performance and reliability on every ride.
Tools Required
- 5mm and 6mm hex wrenches
- Torque wrench [paid link]
- Shock pump
- Clean rags
- Suspension-specific grease and oil
- Small flathead screwdriver
- Pick or seal puller tool
- Measuring caliper
- Isopropyl alcohol
Suspension Fork Not Rebounding Properly
Poor rebound behavior often results in a harsh ride and inconsistent front-end control. This typically stems from improper air pressure, incorrect rebound settings, or internal contamination.
Diagnosis and Fix:
Begin by checking the rebound adjuster knob located at the fork leg’s bottom. If the knob turns too freely or is stuck, disassemble the rebound damper and inspect the internal rod and O-rings. Replace damaged seals and ensure the rebound needle is free of debris. Reassemble using appropriate torque settings and re-check rebound range using the full click spectrum.
Ensure the air pressure matches the rider’s weight. Use a shock pump to adjust it according to the Fox-recommended pressure chart. Test rebound after pressurization to evaluate improvement.
Excessive Fork Dive Under Braking
Excessive dive under braking often indicates inadequate air spring support or poor volume spacer tuning.
Diagnosis and Fix:
Begin by inspecting the current air pressure. If it is within the recommended range but the fork still dives, add volume spacers to increase mid-stroke support. The Fox 34 AWL allows for easy spacer installation by removing the air top cap using a 6mm hex wrench. After deflating the air chamber completely, install one or two volume spacers depending on rider weight and terrain preferences. Re-pressurize and retest.
Oil Leaks Around the Dust Wipers
Oil leakage from the fork seals typically suggests worn or improperly seated dust wipers and foam rings, or over-lubrication during a service.
Diagnosis and Fix:
Inspect the fork stanchions near the dust seals for oil residue. Use a pick to gently remove the dust wipers and foam rings. Clean all components thoroughly with isopropyl alcohol and inspect for cracks or tears. Replace both seals and foam rings with new ones. Apply a thin layer of suspension-specific grease and reinstall. Ensure the seals are pressed evenly into the lowers and seated flush.
Harsh or Sticky Initial Travel
Stiction or lack of small bump sensitivity in the Fox 34 AWL is often due to contaminated bushings or insufficient lubrication.
Diagnosis and Fix:
Disassemble the lowers using a 5mm hex wrench to remove the foot bolts. Carefully slide the lowers off the stanchions and inspect the bushings for signs of wear or dirt ingress. Clean the interior of the lower legs and the bushings thoroughly. Re-lubricate with the appropriate volume of 20wt Gold oil in each leg (approximately 10cc per leg). Reassemble and torque bolts to manufacturer specifications.
Clicking or Clunking Sounds During Compression
Unusual sounds during fork compression cycles usually originate from loose internal components or damper cartridge issues.
Diagnosis and Fix:
Remove the front wheel and compress the fork while holding the front brake. Listen closely to identify the sound’s origin. If it comes from the damper side, remove the damper and check for loosened shaft bolts or unseated top caps. Apply threadlocker if needed and re-tighten to factory specs. If the sound persists, the damper cartridge may be faulty and require a rebuild or replacement.
Travel Reduction or Incomplete Extension
If the fork does not return to its full travel after compression, it may be due to negative air spring equalization issues or trapped air.
Diagnosis and Fix:
Deflate the air spring completely and compress the fork fully to allow the negative and positive chambers to equalize. Reinflate to the correct pressure and measure the fork’s full extension. If it still does not return to full length, disassemble the air spring to inspect the piston and transfer port. Clean and re-grease all parts before reassembly.
Inconsistent Performance in Cold Temperatures
The AWL in Fox 34 AWL stands for “All Weather Load,” indicating this fork is designed for colder environments. However, some users may still notice stiffness or reduced sensitivity in sub-freezing conditions.
Diagnosis and Fix:
Ensure the fork has winter-grade oil such as Fox 5wt Teflon-infused damper fluid. Standard 20wt oil can thicken in the cold, leading to poor performance. Consider reducing the volume of bath oil slightly or switching to low-viscosity lubricants to accommodate extreme temperatures. Always match these changes with the official service guidelines to maintain warranty validity.
Compression Adjuster Not Responding
If the compression knob becomes unresponsive, internal wear or damage to the damper cartridge may be present.
Diagnosis and Fix:
Remove the compression knob by loosening its securing bolt. Check for stripped detents or damaged internal pins. If damage is found, replace the knob assembly. If the problem originates inside the cartridge, consider servicing the damper or replacing the cartridge entirely, especially if the fork has high mileage.
Fork Feels Overly Harsh at Full Compression
A harsh bottom-out feeling is generally due to lack of adequate bottom-out bumper or insufficient ramp-up in the air spring.
Diagnosis and Fix:
Check whether the maximum recommended number of volume spacers is already installed. If not, add more to increase ramp-up resistance. Inspect the internal air shaft for wear or improper placement. If harshness persists despite correct tuning, consider replacing the air spring assembly.
Axle Creaking or Flexing Under Load
Creaking sounds during cornering or braking can be related to the thru-axle or the interface between the lowers and the front hub.
Diagnosis and Fix:
Inspect the thru-axle for proper torque and clean mating surfaces thoroughly. Apply a small amount of assembly grease to the threads and contact surfaces. If creaking persists, check the hub end caps for damage or improper fit. Axle interface issues often mimic fork problems but originate from the wheel.
Conclusion
Troubleshooting the Fox 34 AWL suspension fork involves careful diagnosis and methodical testing. By identifying the specific symptoms and targeting the likely causes, most issues can be resolved with standard tools and service techniques. Regular inspection, proper air pressure management, and scheduled maintenance will ensure your fork performs at its best, regardless of trail or temperature conditions.