2010 Polaris Sportsman 850 Service Manual, Page 257Get this manual
FINAL DRIVE Gearcase Bearing and Seal Replacement
NOTE: If the gearcase is assembled, perform the "Gearcase Disassembly and Inspection" procedure1Remove the nut and lock washer from the pinion shaft (if necessary, hold the coupler in vise to remove the nut)4Remove the retaining ring and lift the pinion shaft and bearing from the main gearcase (see Figure 8-27)
NOTE: If the pinion shaft will not lift out of the gearcase, reinstall the coupler and finger tighten the retaining nutUse two pry bars to lift the pinion shaft assembly out56Support the pinion shaft and press the bearing off the shaft (see Figure 8-27)Thoroughly clean the pinion shaft
WARNING
Wear appropriate safety equipment while installing bearings to reduce the risk of injury7Coupler Support the pinion shaft and carefully press the new bearing on the shaft and install new O-ring (see Figure 8-27)Remove the coupler from the pinion shaft by using two pry bars in the areas shownIf the coupler is difficult to remove, use universal bolt-grip puller to prevent any damage180 Puller Pry Here