Main Crank Bearings

Well i got a new crankshaft due to mine being damaged, so its time to reassemble for the second time. What I am wondering is can any damage be done to the main bearings when the crank is removed? I assembled my engine with all new bearings, but had to strip it back down before completion due to a damaged crank. I carefully pressed the crank out of the cases using the harmonic puller that I used to seperate the cases..... the bearings stayed in their positions in the cases, what I am unsure of is this fine and no damage would have occured to the new unused bearings? or should they be replaced everytime the crank is removed regardless thanks