SERVICE PROCEDURES
2025 GRIP X Damper Rebuild
Required Parts
- 025-03-063 Oil: Suspension Fluid, 4 WT, 1.0 Liter Bottle
- 803-04-091 Seal Kit: 2025 Grip X (34, 36, 38, Super Z)
Required Tools
- 398-00-702 Tooling: Fork Topcap Socket, 26mm, 3/8 Drive
- 398-00-707 Tooling: Fork Topcap Socket, 28mm V2, 3/8 Drive
WARNING: Always wear safety glasses and protective gloves during service to prevent potential injury. Failure to wear protective equipment during service may lead to SERIOUS INJURY OR DEATH.
WARNING: FOX products should be serviced by a trained bicycle service technician, in accordance with FOX specifications. If you have any doubt whether or not you can properly service your FOX product, then DO NOT attempt it. Improperly serviced products can fail, causing the rider to lose control resulting in SERIOUS INJURY OR DEATH.
WARNING: FOX suspension products contain pressurized nitrogen, air, oil, or all 3. Suspension misuse can cause property damage, SERIOUS INJURY OR DEATH. DO NOT puncture, incinerate or crush any portion of a FOX suspension product. DO NOT attempt to disassemble any portion of a FOX suspension product, unless expressly instructed to do so by the applicable FOX technical documentation, and then ONLY while strictly adhering to all FOX instructions and warnings in that instance.
WARNING: Modification, improper service, or use of aftermarket replacement parts with FOX forks and shocks may cause the product to malfunction, resulting in SERIOUS INJURY OR DEATH. DO NOT modify any part of a fork or shock, including the fork brace (lower leg cross brace), crown, steerer, upper and lower leg tubes, or internal parts, except as instructed herein. Any unauthorized modification may void the warranty, and may cause failure or the fork or shock, resulting in SERIOUS INJURY OR DEATH.
Step 1
Carefully clamp the wrench flats of the pressure tube in your soft-jawed vise. Unthread the topcap from the pressure tube counter-clockwise with your 6-point chamfer-less 28mm socket (26mm for remote models). Lift the topcap assembly up and out of the pressure tube.
Step 2
Remove the cartridge from the vice and invert over your waste oil basin. Drain all oil from the cartridge then carefully clamp the pressure tube wrench flats with the base stud facing up. Unthread the sealhead counter-clockwise from the cartridge body with a 18mm wrench. The pressure tubes will separate from eachother.
Step 3
Push the shaft to extend the rebound piston assembly out of the lower pressure tube. Hold the base stuf from turning with a 9mm wrench while turning the Piston Stud counter-clockwise with an 8mm wrench. Hold the base stud while you remove the entire rebound piston assembly by turning it counter-clockwise.
Step 4
Drop the rebound needle and rebound tube out of the shaft. Pull the shaft out of the sealhead.
Step 5
Remove the u-cup seal from the sealhead and replace it with a new greased one from the kit. Make sure to orient the seal correctly as shown.
Step 6
Carefully clamp the piston stud wrench flats in your soft-jawed vise. Unthread the T6 Torx fastener by turning it counter-clockwise. Remove the fastener and valve. Unthread the LSR check housing counter-clockwise with a 13 wrench.
Step 7
Remove the rebound valve stack, the main piston, the compression valve stack, and the check spring. Inspect all shims for damage and replace as needed.
Step 8
Replace the check spring with its smaller diameter end facing the piston stud. Reinstall the compression valving, main piston, rebound valving, then the LSR check housing , tightening clockwise to 9 in-lb torque with a 13mm socket.
Step 9
Reinstall the check shim and T6 Torx fastener by threading them in clockwise to 4 in-lb torque.
Step 10
Insert the open end of the shaft into the sealhead. Reinstall the rebound tube making sure that is seats on the rebound adjuster at the base stud. Reinstall the rebound needle with new greased seals from the kit.
Step 11
Reinstall the piston assembly onto the shaft by threading it clockwise onto the shaft while holding the base stud from turning. Hold the base stud with an 8mm wrench while you tighten the piston base to 30 in-lb with a 9mm crows foot.
Step 12
Pull the shaft assembly down into the pressure tube. Reinstall the upper pressure tube by threading it clockwise onto the lower pressure tube.
Step 13
Invert the topcap assembly and gently clamp the topcap wrench-flats in your soft-jawed vise. Take care to clamp only tightly enough to hold the part without causing any damage. Unthread the piston bolt by turning it counter-clockwise with a 4mm hex wrench. Remove the base valve piston and the valving assembly and set them aside. Replace the Compression Piston o-ring with a new greased one from the kit.
Step 14
Remove the spring perch, spring, and valves from the topcap assembly.
Step 15
Unthread the two bolts from the sides of the HSC adjust hat by turning them counter-clockwise with a 2mm hex wrench. Do not fully remove the screws, just back them out far enough to allow for removal of the HSC adjust hat when lifted up.
Step 16
Pull the IFP and spring assembly up off of the shaft. Separate the spring from the IFP. Replace the seals inside and outside of the IFP with new greased ones from the kit.
Step 17
Reinstall the IFP onto the IFP spring. Reinstall the IFP and spring assembly onto the shaft as shown.
Step 18
Reinstall the HSC Adjust Hat onto the shaft. Align the screws with the holes in the shaft then tighten clockwise to 2.5 in-lb (0.3 Nm) torque with your 2mm hex wrench.
Step 19
Reinstall the valves, spring perch, and spring. Reninstall the compression valving followed by the piston.
Step 20
Reinstall the check spring with the larger diameter end facing the piston valving. Reinstall the piston bolt making sure to keep the check shim centered when tightening the bolt clockwise to 17 in-lb torque with a 4mm hex.
Step 21
Clamp the pressure tube wrench flats in your soft-jawed vise with the open end up. Fill the Pressure Tube approximately 1/2 way with FOX 4wt. oil. Stroke the Damper Shaft ~5 times then fully extend the Damper Shaft. Fill the Pressure Tube with FOX 4wt. oil up to the level of the bleed holes.
Step 22
The topcap Assembly must be installed directly in line with the Pressure Tube to ensure that the O-ring is not pinched. Slowly push the Topcap Assembly into the Pressure Tube. Clean off any oil from the topcap threads. Apply 1-2 drops of blue Loctite 243 to the topcap threads.
Step 23
Carefully clamp the sealhead wrench flats in your soft-jawed vise, then tighten the Topcap Assembly clockwise to 100 in-lb (11.3 Nm) torque with your 6-point chamfer-less topcap socket. Slowly cycle the damper through it's full travel over your waste oil basin to purge any excess damper oil.
