2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 159Get this manual
500 EFI FUEL SYSTEM 7Place the Fuel Pump Service Tool (PU-50326) over the fuel pump PFA nutUsing 12" drive ratchet or breaker bar, loosen and remove the PFA nutDiscard the PFA nut and use new PFA nut upon reinstallation of the fuel pump11Remove new fuel pump assembly, gasket and PFA nut from packagingUse care not to bend float arm during un-packagingDo not lift or carry fuel pump assembly by the float arm12Use cleaning wipes provided to clean fuel tank surface and threadsRemove all debris, grease and oilAllow surfaces to dry completely13Install new PFA gasket onto fuel pump assembly using care not to damage gasket or bend float arm14Install fuel pump into fuel tank, hold float arm to the pump body and tilt assembly to ensure float arm does not get caught or bent during installation15Gently push down on fuel pump flange ensuring flange is centered16Roughly align capped vent fitting with orientation marks on fuel tank to ensure float arm does not get bent or snagged
PU-50326