A friend of mine's truck needed front pads and rotors done, but upon taking them apart I'm not sure what needs to be done. I've never done this style rotor before. Do I need to take the bearing set on the back of the old rotor off? Does it need to be pressed on to the new rotor? Did I get the wrong rotors somehow? The hole on the back of the rotor is much larger than the shaft the rotor goes onto. Also, the nut which holds the rotor on, what is the torque spec? Not sure how this works, I figured someone could enlighten me. If not I'll just pick up a Haynes or something, but usually firsthand advice is better than a cheap manual. Thanks in advance.

 

You have the right rotors. The 2WD's front rotors are incorporated with the hub assemblies (annoying AND expensive, especially since Ford's are notorious for eating rotors). You can move the old bearings over if you want to. I just get new ones. You can get the inner bearing (larger one), outer bearing (smaller one) and grease seal for about $10 a side ($20 total). You have to pack them with grease (you can get a bearing packer for $5 at Kragen's). The bearings are conical so you don't need to press them in or out. The new rotor/hub assemblies should have the bearing races already pressed in so you won't need to use the ones supplied with the bearings (if not, you will need to press them in). Once you've cleaned your spindle, greased the bearings and set them into the races, slide the whole assembly on the spindle and put the spindle nut on so it doesn't slide off. Now you need a torque wrench. You will need to spin the rotor/hub in the counterclockwise direction as you tighten the nut in the following fashion:

Tighten to 24 ft-lbs then loosen
Tighten to 20 ft-lbs then loosen
Tighten to 12 ft-lbs and insert cotter pin.

Now you're ready to re-install the caliper and finish to job.

Hope this helps.

 

Ya,....what Brian42 said.