Mine was a bit tight, which made me think something else besides the four bots was holding it. Trouble with just trying to lift by hand is you have to wiggle it back and forth in order to get it free for lifting. Then when you get it a little way up it skews over slightly and gets tight, so you wiggle it a bit more firmly and it drops back down again.
I put some wedges under the motor flange while wiggling. If you have the possiblilty maintain some tension on the motor with a chain hoist while wiggling, it should come up easily.
Hope you understand all the wiggling bits.
Regards
Phil