Put all the wheels in the lathe to make sure they run true, check for bent pivots, modern clock pivots are mostly made of a soft metal and bend easy. The plates should be laid on something flat, a sheet of glass to check to see if the plates due to a fall are not bent. End shake needs to be checked. Put each set of wheels in, screw up the plates. If the wheels drop on their own from one side of the plate to the other that tells you they are free, if one doesn’t move you know which needs sorting out. Pivots in modern clocks should be burnished because they are soft and rough up easily. Make sure all the teeth are good and not bent. Have you re-bushed any holes? if so are they correct in depth.
If you can sort all that and try it. If it still stops get back to me and I’ll have to put my thinking cap on.