Install training wheels
when installing the training wheels, check to see if it is put together in this order ....flat washer, training wheel, flat washer, lock washer, nut. I hope this helps. If you are missing any of these you can find them at any auto parts store, Wal-mart, or hardware store such as Lowe's or Home Depot. (Be sure to take the traing wheel and nut to make sure you have the right size)
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