Re: Pre load
Les Andrews' Mechanics Handbook says 20 inch-pounds of drag with a new bearings and 12 to 15 inch-pounds with old bearings. You can buy adapters that go from 3/8 square to 1/2 square drive for the larger socket at any automotive store or McMasters-Carr. Or if need be an adapter to go to 3/4 square drive.
So, tighten the nut then measure the drag on the bearings using the torque wrench. After installing the locking plate and locking nut, recheck the drag. 12 to 15 inch-pounds of drag is not much. You can get a feeling for how much it is by just clamping the drive of your torque wrench in a vice and torquing to 12 to 15 inch-lbs. It is about one foot-pound so if you have 16 ounce hammer with a one foot handle you can clamp the handle to the drive shaft to get the approximate drag torque.
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