Greg,
I would go ahead and loosely set up the blade guides. If it's like my 18" Rikon and 10" Craftsman (made by Rikon) the top wheel is fixed and you have 4 adjustment bolts on the outside of the bottom wheel axis to adust co-planarity (new vocabulary word for the day
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Like Fred said, spin the wheel and adjust tracking before fooling with the adjustment bolts. If it won't stay on the center of the wheel you can tilt the bottom wheel to compensate. It should be correct but my 10" needed a small amount of adjustment...like a 1/2 turn in on the top and out on the bottom bolts to tilt it out. If you have to make adjustments I would suggest putting a small drop of paint (fingernail polish works well) on each bolt at the 12 o'clock position to keep track of your position. You will need to back out the opposite bolt to allow it to move.
If everything works ok set your blade guides and put your top on.
Call me if I can help further. 704906-5627