2007-2011 Polaris IQ Snowmobiles Service Manual, Page 435Get this manual
Shocks 16Use pliers to pull the cap up against the c-clip
17Charge the reservoir with nitrogen to the specified pressureOnce pressurized, the shock rod should fully extend18With pressure working against the reservoir cap, secure the pressure valve into the cap, then remove the shock fill tool from the valveReinstall the button head screw