Repeat these steps to build all 9 wheels.
Locate the individual bagged parts for the wheels. Each contains 1 wheel, 2 bearings, 2 washers, and 1 lock nut.
On a flat surface, press one of the bearings into the face of the wheel until it is flush. (photo 1)
Turn over the wheel. Drop a washer into the center of the wheel aligned with the center hole. (photo 2)
Press the second bearing into the face of the wheel until it is flush. (photo 3)
Set aside the completed wheel and lock nut for later steps. The second washer is not used.
Be sure to place a washer between the two bearings.
The washer may fall out of alignment with the center hole. This is expected.
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