2008 Polaris ATV Outlaw 450/525 Service Manual, Page 112Get this manual
BODYSTEERINGSUSPENSION 13With the IFP set and the bleeder screw removed, slowly stroke shock to force air through piston orificeMove the shock body slowly to prevent aeration of the oilAllow all air to purge through the bleeder screw hole16Install pressurizing valve with new Oring and tighten securely
14Install the bleeder screw with new Oring and tighten securely, using the flats on the tool to prevent the IFP from turningPour out excess oilIt is not necessary to completely clean all oil from the nitrogen chamber, small amount of oil will lubricate the IFPVerify the proper IFP depth to within .025" (.63mm) with dial caliperBe sure to measure to the flat portion of the IFP, not to the tapered outer edge
17Set the nitrogen tank pressure regulator to 200 205 PSI