that what im talking about what kinda tools doo u useAre you talking about a chainsaw after you split a case and put new bearings in the case halves and need to pull the crank back through the newly installed bearing . If this is what your referring to then yes I have done it with one of those Farmertec Stihl knock off case splitting tool that is just for the clutch side that will also pull the crank through the bearing to seat the crank. It is pain to do it and take a lot of fiddling around but it does work . I have reassembled cases just by using the case screws to pull the halves together and use a soft hammer to center the crank.
If your referring to something different than a chainsaw I have no idea what would need to be done.