Just finished doing that with my '51 woodie. Pulled a couple wheels and ended up replacing all the seals and repacking or replacing all the inner bearings. My machine doesn't have grease fittings on the wheels but on those that do usually only the outer bearing gets the grease when it is the inner one that really needs it. Guess it depends on when they were last serviced but I would pull a couple of wheels for a closer inspection. The back wheel is the critical one, unfortunately its the most difficult.....
