2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 163Get this manual
FINAL DRIVE REAR BEARING CARRIER
Bearing Carrier Inspection
123Support machine securely with rear wheels elevatedGrasp wheelhub and check for movementIf movement is detected; inspect the hub, retaining nut torque and bearing conditionCorrect as necessaryCotter Pin Washer
Remove the wheel hub castle nut, washer, and remove the wheel hub from the rear drive shaft and rear bearing carrierWheel Hub
Castle Nut
CAUTION
Serious injury may result if machine tips or fallsBe sure machine is secure before beginning this service procedureWear eye protection when removing bearings and sealsRH Hub Shown
Remove the upper and lower control arm bolts from the rear bearing carrier
Bearing Carrier Removal
123456Place the ATV in neutral and lock the parking brakeRemove the cotter pin from the wheel hub castle nut and loosen the hub nut slightlyLoosen the wheel nuts, but do not removeElevate rear end and safely support machine under main frame areaRemove wheel nuts and wheelRemove the two brake caliper mounting bolts and remove the rear brake caliper (only if servicing the left-hand side)Bolt Bolt