Rizal Philippines.
4.21,2021
Yesterday, I learned from Google (You Tube) on how to:
1. Regrease sealed bearing (I thought you grease them only at the shaft;
2. Removal and installation of sealed bearing
We usually bring the bike to the bike shop for these two services
1. Regreasing the sealed bearing
With a pick or a sharp pointed cutter, we pry off the rubber cover of the sealed bearing. Then we see
the bearings on their cage. We can discover that: they are dry or rusty.
I was able to do this with an MTB with sealed bearing. I think the practice can save you money from
buying the hard to get bearings, and or prolong their lives.
I eliminated the funny noise from the rear hub of MTB and the wheels turn faster and smoother.
2. Removal of the sealed bearing
1. Without tools
1. You can use a flat head screw driver to dislodge the bearing from the hub. Be careful
not to scratch the inside of the hub; as you would have difficulty in reinstallation.
or use a drift if the shaft/axle using a rubber mallet. Attach a nut on the axle shaft so as
to destroy the threads.
2. Reinstallation
Use the old bearing as a drift to reinstall the bearing. Use the rubber mallet again to drive
the bearing again
2. With tools
1. For novatec, there are special tools. There is a bolt with expander that you grasp the
the inside of the bearing hub. Then to remove, as in the crankset puller, you turn the upper
portion so that the puller extracts the bearing from the hub.
2. Or use steel round bar with endless threads (about 14 to 18 cm) At the end are large washers
that can grab the diameter of the bearing. You pull from the other side by turn a butterfly
nut or ordinary nut to pull, dislodge the bearing
3. Reinstallation is the reverse of removal.
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