WHY OSCILLATE OR ROTATE A WHEEL-END WHILE TIGHTENING THE ADJUSTING NUT TO A SPECIFIED TORQUE?
Oscillating or rotating the wheel-end works the bearing’s rollers against the cone large rib (often referred to as seating the bearing). Gravity pulls the roller down the incline of the cone raceway and away from the cone large rib; this creates clearance between the rollers and the rib. This clearance will not be present during operation so accurate bearing setting requires that this clearance be removed while tightening the adjusting nut. Oscillating or rotating the wheel-end helps move the roller up the incline of the cone raceway.
