When I removed the existing bearings. Each one came out with an "O" ring. The new replacement bearings I have also have a groove around the bearing housing just as the originals did.

The above is an original "O" ring and a new bearing.
Below is the groove Im questioning.

I took the liberty of placing the "O" ring on the bearing below. Has anyone else installed bearings with the "O" rings? Or did you install your bearings with the groove open like that above?

Where the axle passes through the bearing (arrow pointing to the edge) Should I apply silicone to keep water from passing through?


A. These are the only two holes in the groove. When I install the bearing. Should these be pointing any particular way?
B. The original bearings had this groove with an "O" ring.
C. What's the purpose of this?
RJ

The above is an original "O" ring and a new bearing.
Below is the groove Im questioning.

I took the liberty of placing the "O" ring on the bearing below. Has anyone else installed bearings with the "O" rings? Or did you install your bearings with the groove open like that above?

Where the axle passes through the bearing (arrow pointing to the edge) Should I apply silicone to keep water from passing through?


A. These are the only two holes in the groove. When I install the bearing. Should these be pointing any particular way?
B. The original bearings had this groove with an "O" ring.
C. What's the purpose of this?
RJ
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