What he said, about the wheels. Post-War and MPC era, open-frame motored locos with the spur gears outside the chassis, the wheels turn freely when turned by hand; pull-more and can motor types with worm gears, don’t.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .