SERVICE PROCEDURES

2025 Rail 2.0 Damper Rebuild

Required Parts

  • 025-03-023 Oil: Suspension Fluid, 5wt, Teflon Infused, 1.0 US Quart
  • 803-04-087 Seal Kit: 2025 Rail 2.0(Z1, Z2, AWL)

Required Tools

  • 398-00-371 Tooling: Sealhead to Shaft Bullet, 10mm
  • 398-00-702 Tooling: Fork Topcap Socket, 26mm, 3/8 Drive
  • 803-01-324 Kit:Tooling: Clamps, Damper, Body and Shaft

Supplies Needed

  • 20mm Wrench
  • 8mm Open-End Wrench/Socket
  • 9mm Socket
  • Seal Pick
  • Torque Wrench

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.

img/help/page3001-QZ29/IMG_9754 copy-m.jpg

Step 1

Carefully clamp the wrench flats of the lower pressure tube in your soft-jawed vise. Unthread the topcap from the pressure tube counter-clockwise with your 6-point chamfer-less 26mm socket,Lift the topcap assembly up and out of the pressure tube.

img/help/page3001-QZ29/IMG_9754 copy.jpg
img/help/page3001-QZ29/IMG_9755 copy.jpg
img/help/page3001-QZ29/IMG_9757 copy.jpg
img/help/page3001-QZ29/IMG_9758 copy.jpg


img/help/page3001-QZ29/IMG_9759 copy-m.jpg

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 with the base stud facing up. Unthread the sealhead counter-clockwise from the cartridge body with a 20mm wrench. 

img/help/page3001-QZ29/IMG_9759 copy.jpg
img/help/page3001-QZ29/IMG_9789 copy.jpg
img/help/page3001-QZ29/IMG_9790 copy.jpg
img/help/page3001-QZ29/IMG_9792 copy.jpg


img/help/page3001-QZ29/IMG_9761 copy-m.jpg

Step 3

Hold on to Top Cap and unthread the Piston Nut counter-clockwise with an 8mm wrench/socket. Remove the Piston, Check Spring, Check Shim followed by the Compression Piston and Compression Valving.

img/help/page3001-QZ29/IMG_9761 copy.jpg
img/help/page3001-QZ29/IMG_9760 copy.jpg
img/help/page3001-QZ29/IMG_9762 copy.jpg
img/help/page3001-QZ29/IMG_9763 copy.jpg


img/help/page3001-QZ29/IMG_9765 copy-m.jpg

Step 4

Unthread the Compression Needle counter-clockwise, then pull up to remove.

img/help/page3001-QZ29/IMG_9765 copy.jpg
img/help/page3001-QZ29/IMG_9766 copy.jpg


img/help/page3001-QZ29/IMG_9775 copy-m.jpg

Step 5

Replace the o-rings on the Topcap and Compression Needle with new greased ones from the kit. A plastic seal pick is recommended to prevent damage to the seal glands.

img/help/page3001-QZ29/IMG_9775 copy.jpg
img/help/page3001-QZ29/IMG_9767 copy.jpg
img/help/page3001-QZ29/IMG_9769 copy.jpg


img/help/page3001-QZ29/IMG_9771 copy-m.jpg

Step 6

Apply clump level of Blue Utraplex LT2 grease(025-01-027) to threads of Compression Needle. Reinstall the Compression Needle into the Compression Shaft.

img/help/page3001-QZ29/IMG_9771 copy.jpg
img/help/page3001-QZ29/IMG_9772 copy.jpg
img/help/page3001-QZ29/IMG_9773 copy.jpg


img/help/page3001-QZ29/IMG_9777 copy-m.jpg

Step 7

Clean and inspect the Compression Valving shims for any damage. Replace if necesarry. Orient the Compression Valving in its original order then reinstall onto the Compression Needle.

img/help/page3001-QZ29/IMG_9777 copy.jpg
img/help/page3001-QZ29/IMG_9778 copy.jpg


img/help/page3001-QZ29/IMG_9779 copy-m.jpg

Step 8

Reinstall the Compression Piston onto Compression Needle( Important orientation of Piston is critical, one reaide ring towards top cap. Reinstall the Check Shim on top of the Compression Piston.

img/help/page3001-QZ29/IMG_9779 copy.jpg
img/help/page3001-QZ29/IMG_9780 copy.jpg
img/help/page3001-QZ29/IMG_9781 copy.jpg


img/help/page3001-QZ29/IMG_9782 copy-m.jpg

Step 9

Reinstall the Check Spring, then apply 1-2 drops of Red Loctite 263 to the Piston Nut threads. Reinstall the Piston Nut tightening clockwise to 16 in-lb (1.8 Nm) torque with an 8mm socket. Verify that the Check Shim is not pinched and can spin freely after Piston Nut tightening. Clean off any excess Locitite.

img/help/page3001-QZ29/IMG_9782 copy.jpg
img/help/page3001-QZ29/IMG_9783 copy.jpg
img/help/page3001-QZ29/IMG_9784 copy.jpg
img/help/page3001-QZ29/IMG_9785 copy.jpg
img/help/page3001-QZ29/IMG_9760.2 copy.jpg


img/help/page3001-QZ29/IMG_9787 copy-m.jpg

Step 10

Carefully clamp the Pressure Tube and unthread the Sealhead counter-clockwise from the cartridge body with a 20mm wrench. Lift the damper shaft assembly up to remove it from the cartridge body.

img/help/page3001-QZ29/IMG_9787 copy.jpg
img/help/page3001-QZ29/IMG_9788 copy.jpg
img/help/page3001-QZ29/IMG_9793 copy.jpg
img/help/page3001-QZ29/IMG_9794 copy.jpg


img/help/page3001-QZ29/IMG_0015 copy-m.jpg

Step 11

Clean the Damper Shaft Assembly with Isopropyl alcohol and a lint-free paper towel then carefully clamp the damper shaft with the sealhead above the shaft clamps. Unthread the Base Stud counter-clockwise using a 9mm wrench.

img/help/page3001-QZ29/IMG_0015 copy.jpg
img/help/page3001-QZ29/IMG_0017 copy.jpg


img/help/page3001-QZ29/IMG_0018 copy-m.jpg

Step 12

Turn the Rebound Needle with the Base Stud, keeping them together as you remove them. Replace the O-Ring on the Needle with a new greased one from the kit

img/help/page3001-QZ29/IMG_0018 copy.jpg
img/help/page3001-QZ29/IMG_0019 copy.jpg
img/help/page3001-QZ29/IMG_0020 copy.jpg
img/help/page3001-QZ29/IMG_0021 copy.jpg
img/help/page3001-QZ29/IMG_9814 copy.jpg


img/help/page3001-QZ29/IMG_0023 copy-m.jpg

Step 13

Remove the Sealhead. Insert the 10mm Shaft Bullet(398-00-371) into the Shaft then coat it with slick honey and install the new Sealhead from the kit then remove the tool. 

img/help/page3001-QZ29/IMG_0023 copy.jpg
img/help/page3001-QZ29/IMG_0024 copy.jpg
img/help/page3001-QZ29/IMG_0025 copy.jpg
img/help/page3001-QZ29/IMG_0026 copy.jpg
img/help/page3001-QZ29/IMG_0027 copy.jpg


img/help/page3001-QZ29/IMG_0028 copy-m.jpg

Step 14

Apply 2-3 drops LOCTITE 263 to the Base Stud threads. Insert the Rebound Needle with Base Stud and turn the Base Stud and Needle together as you thread them in clockwise. Tiorque to 40in-lb(4.5Nm)

img/help/page3001-QZ29/IMG_0028 copy.jpg
img/help/page3001-QZ29/IMG_0029 copy.jpg
img/help/page3001-QZ29/IMG_0030 copy.jpg
img/help/page3001-QZ29/IMG_0031 copy.jpg


img/help/page3001-QZ29/IMG_9844 copy-m.jpg

Step 15

Apply 1-2 drops of blue Loctite 243 to the threads of the Pressure Tube. Take care not to get Loctite on the o-ring within the Sealhead Assembly. Reinstall the Damper Shaft Assembly tightening the Sealhead clockwise

img/help/page3001-QZ29/IMG_9844 copy.jpg
img/help/page3001-QZ29/IMG_9845 copy.jpg
img/help/page3001-QZ29/IMG_9846 copy.jpg


img/help/page3001-QZ29/IMG_9851 copy-m.jpg

Step 16

Carefully clamp the wrench flats of the lower pressure tube in your soft-jawed vise. Fill the Pressure Tube to required oil level with FOX 5wt. Teflon infused oil*. Stroke the Damper Shaft ~5 times then fully extend the Damper Shaft.

Product Oil Volume 
34 AWL,Z2,Z2remote 63cc
34 AWL Sport 58cc
36 AWL HD, 36 AWL HD Sport, Z1, Z1 Remote 69cc
34 AWL Sport Reb-Only  
36 AWL HD Sport Reb-Only  

 

 *Originally shipped with 5 WT Teflon, now approved for 4WT. Please consume 5WT while supplies last.

img/help/page3001-QZ29/IMG_9851 copy.jpg
img/help/page3001-QZ29/IMG_9847 copy.jpg
img/help/page3001-QZ29/IMG_0036 copy.jpg
img/help/page3001-QZ29/IMG_0035 copy.jpg
img/help/page3001-QZ29/IMG_0034 copy.jpg


img/help/page3001-QZ29/IMG_9848 copy-m.jpg

Step 17

Apply blue Loctite 243 to the Cartridge body threads. Then slowly push the Top Cap assembly into the body. Thread the Topcap clockwise onto the body and torque to 150in-lb(16.9Nm).

img/help/page3001-QZ29/IMG_9848 copy.jpg
img/help/page3001-QZ29/IMG_9849 copy.jpg
img/help/page3001-QZ29/IMG_9850 copy.jpg
img/help/page3001-QZ29/IMG_9852 copy.jpg