2003 Polaris ATV Trail Boss 330 Factory Service Manual, Page 144Get this manual
FINAL DRIVE 8Using brass drift, tap bearing spacer to one side to expose inner bearing raceDrive bearing out using drift through opposite side of hub and discardTap spacer to side Seal
FRONT HUB ASSEMBLY
Hub assembly view
1Drive or press one new bearing into hub using 1.180 (46 mm) bearing driver9Remove spacer and drive other bearing out and discard10Clean hub and spacer thoroughly11Inspect spacer for wear or damageMeasure length of spacer and replace if worn beyond service limit or if ends are roundedCAUTION: Do not drive on the inner race of the bearing