I have 7 of the Thomas themed engines that I bought to run for my grandchildren. 4 are working great and 3 seem to be locking up. They do not have many hours on them and I have cleaned the track well. I know they are not the highest quality but was wondering was there something I could do to loosen them up. They are about 2 years old. Thanks.
Other than lubrication you might want to check the wheels to make sure they are quartered properly. If you are not sure about how to do it perhaps a call to the Bachmann service department would help.
http://www.bachmanntrains.com/home-usa/service.php
Thank you. I know nothing about Quartering wheels so will have to check on that.