My car's rear wheel bearing made groaning noises on the highway. Upon visual inspection, I saw grease leaking out of it. I removed and cleaned it (sorry for those steps and pics being omitted), then got ready for putting fresh bearing grease into it.
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Step 1: The Hub and Bearing.
The inner race is made in two halves. The inboard half is out to allow cleaning and inspection of one set of bearings. There is another, smaller set of bearings around the outboard race that is in place.
Step 2: Greasing!
Using my finger, I packed in fresh bearing grease into the hub. I rotated both sets of bearings to make sure the new grease flowed into all the voids.
I also put grease on the spindle. Once satisfied I pushed back in the inner race.
Step 3: Putting Back the Hub.
Easy enough to slide the hub onto the spindle, put the washer followed by the nut. I torqued to 181Nm. Finally I staked the spindle nut.
Step 4: Completion!
With the wheel back on I lowered the car and it was ready for a test drive!
On the highway it ran quiet! I only heard the tire on the road and not any groaning noise!