Gschira, there is a factory spec for wheel bearing play (0.01-0.02 mm) using a dial indicator on the rim, and pulling/pushing in/out on the wheel. However, I have found this approach to be subjective at best, even with a very good dial indicator and stand. Most of the guys on here use the method mentioned in the earlier post; tighten the nut up snug to remove any play and grease buildup, then loosen a bit. Then grab thre top and bottom of the tire and pull back and forth; you will feel the play in the bearing. Snug the nut until there is just a tiny tad of discernable play when you tug on it.

After replacing and adjusting bearings, drive it awhile and recheck; sometimes the races reseat a bit under the loads of driving.

DG