Prime mover and box car combination for handling cargo

A prime mover and box car combination for delivering cargo between cargo handling stations and for loading and unloading the cargo at the cargo handling stations comprising:

• a prime mover for propelling a box car and having movable first support rails movable to an extended operating position, said prime mover adapted to be driven on a way between cargo handling stations;
• a box car detachably secured to said prime mover for movement therewith and having second support rails in alignment with said first support rails and abutting said first support rails in said extended operating position;
• and
• a cargo handling mechanism carried by said first support rails of said prime mover and slidably mounted on said abutting first and second support support rails for movement between said extended operating position of said first support rails and cargo handling mechanism to a cargo handling position on said second support rails for loading and unloading cargo at the cargo handling stations.