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Mar 2022 orig.
Any damage or issues resulting from improper service will not be covered by warranty. If you have a fork still in its original warranty period and do not wish to void your warranty, please contact an authorized Cane Creek service center.
These service instructions cover the basic service procedures using standard service kits. If your suspension requires parts beyond standard replacement parts – CSU, compression rods, etc. – please consult your authorized Cane Creek service center or contact us at our Cane Creek Support Center.
These instructions cover just the air spring leg of a complete 100 hour service. Combine these instructions with the appropriate damper side and 50 hour lower service to get a complete 100 hour fork service.
Additionally, you can send the damper for a service with an authorized Cane Creek service center.
BAG0642 – HELM MKII Air Spring Rebuilt Kit
AAD0555 – 8mm & 9.5mm Shaft Clamp
Sockets – chamfer-less 30mm
Crowfoot wrenches – 20mm
Open Ended Box wrenches – 20mm
Thin Open Ended Box wrenches – 29mm
Torque wrenches
Pick
Suspension Grease
Royal Purple 10w-30
Torque & Loctite Chart
| Part | Torque Spec | Loctite Spec |
| Seal Head | 6 Nm | 243 (Blue) |
| Air Piston to Shaft | 6 Nm | 263 (Red) |
| Doublair Top Cap | 36 Nm | 243 (Blue) |
Oil Chart
| Oil Location | Oil Type | Oil Amount |
| Top of Air Spring | Royal Purple 10w-30 | 2.5 mL |
Review all related TSBs before performing any service.
Prior to beginning damper service, remove the lower assembly per the 50 hour service instructions.
Secure CSU. Double check all air has been removed from air spring of BOTH the positive AND negative chambers by pressing the main air fill valve AND the negative charge button simultaneously. Failure to do so can result in injury. Using 30mm chamferless socket, remove Doublair volume piston. Breaker bar may be necessary. Note position of volume reduction, if present.
Remove air spring seal head circlip. Remove air spring by pulling straight up. Clean all oil from air spring using diluted alcohol.
Always use extreme caution when using a pick in this step or others to avoid scratching metal parts. Failure to do this can create scratches in the o-ring glands which cause leak paths for oil or air. When possible, pinch and remove o-rings rather than using a pick.
Using 8mm shaft clamp, clamp air spring assembly between the air seal head and air piston. Using 20mm open ended wrench, remove air piston from air shaft. Pinch & remove and discard air piston quad ring. If piston is blue, discard and replace with new red piston.
TSB037 – HELM MKII Air Piston Update
Grease bushing on new air seal head (AAG0635). Grease air seal head quad ring (AAD1809). Slide air seal head top nut (AAG1021) onto air shaft, noting correct orientation. Install first back up ring (AAD1807), quad ring and second back up ring. Noting the concave side of back up rings towards quad ring. Install new air seal head.
Grease quad ring groove on air piston. Grease and install air piston quad ring (AAG0115) on the air piston. Ensure the quad ring is flush and not twisted. Clamp air shaft. Add red Loctite (263) to air shaft threads. Install air piston. Thread on with 20mm open ended wrench. Torque to 6.0 Nm using 13mm socket.
TSB037 – HELM MKII Air Piston Update
Install sag o-ring (AAG0408) on spring side stanchion. Lightly grease inside of air spring stanchion. Lightly grease air piston quad ring and air seal head o-ring. Install air spring assembly into stanchion. Ensure seal head is fully seated and circlip channel is exposed. Reinstall seal head circlip. Pull up on air spring to ensure circlip is properly seated.
Add 2.5 ml of Royal Purple 10w-30 to the top side of the air spring. Lightly grease stanchion below the threads. Lightly grease o-ring on Doublair top cap o-ring and volume reduction if present. Apply blue Loctite (243) to threads on Doublair top cap. Install assembly. Torque to 36 Nm using 30mm socket.
Upon completion of the spring side install and any damper service, install lower assembly per the 50 hour service instructions.
