1990-1998 Arctic Cat Snowmobiles Repair Manual, Page 466Get this manual
CHAPTER SIXTEEN
24Move the shock rod slowly up and down few times to remove any air trapped around the pistonKeep the piston below the level of the oil25Check the oil level and make sure the oil level is still 1.5 infrom the top of the body26Lubricate the floating piston and rings (2021, Figure 21) lightly with shock oil and insert the floating piston into the bodyNOTE special installing and setting tool (part No0644-169) is available for setting the floating pistonThe same tool will grip the end of the floating piston to help removal
NOTE Fill the system with nitrogen gasDo not attempt to fill the shock with air
32Insert the inflation needle (part No0644158) or equivalent into the valve, open the fill valve, then slowly increase the regulated pressure to 200 psi33When filled, close the filler valve, remove the inflation needle and reduce the regulated pressure to zeroInstall and tighten the screw (30, Figure 21)34Test operation of the assembled shock as follows:
27Position the floating piston at the distance from the top of the body indicated in Table (Figure 24)Oil should be expelled from the hole in the piston when installingNOTE Ifoil is not expelled when positioning the floating piston in Step 27, there is not enough oil in the reservoirAdd oil and make sure oil without bubblesflowsfrom the orifice in the floating pistonIf necessary, push the piston in, then pull the piston up, but do not pull the piston above the level of the oil