2004 Skidoo ZX Series Service Manual, Page 501Get this manual
Section 10 REAR SUSPENSION Subsection 02 (SC-10 III SUSPENSION)
When removing and retightening the tire valve acorn nut use minimal torqueWhen the cap is over tightened and subsequently removed it may prematurely break the seal of the tire valve to the shock body and cause loss of nitrogen charge without being noticedIf you suspect this has happened then recharge the shock as precautionInspect the tire valve cap before installation to ensure that the internal rubber gasket is in its proper positionAdding Gas Pressure Nitrogen (N2) can now be added to damper bodyWARNING
Whenever working with high pressure gas, use eye wear protectionNever direct gas pressure toward anybodyUse appropriate inflation toolNeedle Valve Type Shock Install the gas refill needle type shock tool (PN 503 190 102) on valve tip (PN 529 035 570)Set the regulator pressure on the nitrogen cylinder as per the shock requirementMount the shock on viseRemove screw on top of valvePlace the needle guide of gas refill tool on the shock valveWhile depressing the detent pin of the gas refill tool and pushing forward the needle assembly, insert the needle through the rubber core of the pressure valve assembly of the shock503 190 102 529 035 570