2007 Arctic Cat Four-Stroke Factory Service Manual, Page 466Get this manual
! NOTE: The large flat side of the wheel insert is positioned next to the inner plastic adjuster bushingThe idler wheel must be installed with the wheel insert properly positioned
CLEANING AND INSPECTING
! NOTE: Whenever part is worn excessively, cracked, or damaged in any way, replacement is necessary
2Loosen the track adjusting boltsSlide the outer adjuster bushings off the axle
1Clean the bearings with clean cloth2Inspect all idler wheel inserts (inner and outer) for any cracks3Inspect the outer rubber portion of the idler wheels for cracks and poor bonding4Inspect the plastic insert of each idler wheel for cracks5Inspect the shaft for wear and damaged threads6Inspect all idler wheel bearingsTurn each bearing (by hand) and if any roughness or binding is noted, replace the bearing7If bearing must be replaced, use this procedure