Alignment can generally be done with a good straight edge.
Inspect both pulleys for any bends, warps, cracks or any other deformations. If in doubt replace them with the same size.
The arbor, being fixed will only have a bit of adjustment along the shaft. The motor might have a parallel or axial misalignment & should be easy to resolve.
Good luck & hope this helps.
..Jon..

Inspect both pulleys for any bends, warps, cracks or any other deformations. If in doubt replace them with the same size.
The arbor, being fixed will only have a bit of adjustment along the shaft. The motor might have a parallel or axial misalignment & should be easy to resolve.
Good luck & hope this helps.
..Jon..