FQ Hans

This week I adjusted a wheel bearing on the kenworth in the shop. I used the TMC procedure to adjust the bearing. The procedure for this is to 1. Tighten the inner nut to 200 ft lbs to seat the bearing. Then 2. Back off the inner nut one full turn. Next 3. Torque the inner nut to 50 ft lbs. Then 4. Back the inner nut off 1/4 turn. Then you can install the washer and the outer nut. Finally you torque down the outer nut. The torque of the outer nut is dependent on whether it is a drive or steer axle, how many threads per inch it has and what type of washer it uses. In this case the finally torque was 300-400 ft lbs. Once that is done you can place a dial indicator from the wheel hub to the axle nut and move the hub back and forth to measure endplay. Endplay should be between. 001-.005 of an inch. If you have a reading of zero, the adjustment needs to be redone because then you don't actually know how much preload is on the bearing.