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Packing wheel bearings and installing
them into the hub.
1. Make sure the bearings fit the spindle properly. Big one goes
on the inside of the spindle, little one goes on the outside.
Submitted by Paul
2. Are the outer races installed in the hub already? If not here's how to do that. On both the inner bearing and outer bearing race the smallest diameter will be on the inside of the hub. You want to be able to drop the bearing in after you have them installed. CAREFULLY drive the races (no bearings and cages in there yet) into the hub using a ham-mer and a brass drift or whatever you can get your paws on that you can use to drive the races in square without marring up the bearing surface. They will seat against a shoulder machined into the hub, you will be able to feel it. 3. Packing the wheel bearings. If you don't have a wheel bearing packer here's how I do it. Make sure the bearings are clean, if they are new they will be pretty good. Take a wad of good hi temp wheel bearing grease place it in the middle of the palm of your hand, just a little smaller than a golf ball will do. This is not a clean operation. Hold the wheel bearing in your other hand with the large end of the bearings facing the grease force the grease into the bear-ing by pushing it down into the grease. Keep on until it comes through the top if the cage, you will see it. Work the grease in all the way around. When you've packed all the bearings set them on a clean rag and cover them up. 4. Now that you have all your outer races installed and all the bearings packed this is next. Take about 3 fingers or about 2 golf balls of grease and put it into the hub, smear up the outer races and place the rest somewhere in the hub in between where the 2 bearings will be. Do this with the rotor on a good solid workbench and the hub facing outside down. Install the rear bearing (the big one), make sure its seated good into the outside race. Now install the seal. I like to fill the inside lip of the seal before I install it, probably don't have to though. If your seals are the same as mine just drive them in much the same as the outer races, keep them going in as square as you can, I like a good block of wood. For now leave the outer (small bear-ing) out. 5. Installing the hub onto the spindle. I like to smear up the spindle with some grease, no need to get carried away though. Grab the hub/rotor and slide it carefully over the spindle until the inside bearing comes up against the shoulder machined on the spindle, next install the outer bearing over the spindle and seat it against its race al-ready in the hub. Install the large flat washer with the tang into the grove in the spindle. Next install the nut, tighten it up by hand until the slop is taken up. Turn the hub by hand, it should be rolling on bearings at this point. 6. Setting bearing preload. Take a small pair of pliers and turn the spindle nut until its tight, don't get carried away while your tightening keep on rolling the hub and rotor assembly by hand. It should feel like its getting harder to turn over. If it should lock up, back off and recheck things then start over. Tighten the nut as tight as you can with the pliers then loosen it up 1/2 turn, finish by tightening the nut as tight as possible by hand, no wrench or pliers. Turn the nut till it lines up with the closest slot to install the cotter pin. Install cotter pin and bend the ends over in opposite directions around the nut, install the cap. You should have just a wee bit of play, barely notice-able. Now you can think about installing the rotors and brackets.. Its almost faster for me to do this as it is to type it! LOL |
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