2002 Ski-Doo Shop Manual Volume Three, Page 324Get this manual
Section 07 REAR SUSPENSION Subsection 04 (SC-10 III SUSPENSION)
MC VR Shock For the verification of stroke, install shock in vise keeping the rod upwardVerify the stroke compression when the rod is fully extendedThe feeling will be stiff for around first 25 mm (1 in), soft up to 25 to 50 mm (1 to in) and stiff after thatThis stiff, soft and stiff phenomenon shows the normal operation of shockAll Models Equipped with Gas Pressurized Shock NOTE: Gas pressurized shocks are light gray or purple painted, or bare aluminumGas shock can be inspected as follows: Because of gas pressure, strong resistance is felt when compressing shockWhen released, the shock will extend unassistedRenew as requiredIf suspecting an internal gas leak between oil chamber and gas chamber, check shock as follows: Install shock in vise clamping on its bottom eyelet with its rod upwardLet it stand for minutesCompletely push down the shock rod then releaseRod must come out at steady speedIf speed suddenly increases particularly at end of extension, replace shockAll Types of Shock If suspecting frozen shock proceed as follows: Place shock in freezer (temperature below 0C (32F)) for hoursPush down on rod and note its resistanceIf shock is frozen it will be much more difficult to compress than for the new one