2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 235Get this manual
CLUTCHING 3Inspect all rollers, bushings and roller pins by pulling flat metal rod across the rollerTurn roller with your fingerIf you notice resistance, galling, or flat spots, replace rollers, pins and thrust washers in sets of threeAlso inspect to see if roller and bushing are separatingBushing must fit tightly in rollerUse the Roller Pin Tool (PN 2870910) to replace rollers and pinsTake care not to damage roller bushing or bearing surface of the new pin during installation
Button To Tower Clearance Inspection
1Inspect for any clearance between spider button to towerIf clearance exists, replace all buttons and inspect surface of towersSee "Spider Removal" procedure
Button to Tower Clearance: .000-.001