Easy, but a little long winded to do, is the bearing shot or is it just free play as they are adjustable.

Begin by removing the front wheel and the free wheeling hub, remove the plate from the wheel bearing which operates the hub.

This will give you access to the bearing nut, this can either be adjusted or removed. If it just needs adjusting it is as easy as tightening it, then filling it with grease.

To change it, as above and remove the hub bearing nut, remove the inner end of the driveshaft from the axle end flange and pull out.

From under the vehicle, drive the old bearing out, refit the new bearing and slide the driveshaft back in.