The Lionel Santa Fe No. 634 EMD NW2 Switcher was issued in 1963 and again in 1965 and 1966. This painted BLUE engine initially came with YELLOW heat-stamped lettering and safety stripes on the front and rear, but later issues would not have the safety stripes.
Although the holes for the bell, horn and radio antenna have been filled, this diesel is most commonly found with the square holes for the front marker lights as is illustrated to the right. This switcher was illuminated, but it is most likely found without a front headlight lens.
This diesel switcher was equipped with a two position directional unit whose control lever was adjustable from the top of the body that was mounted on the late version of the sheet metal frame. This engine was powered by one Type IVA motor, and had a solid plastic coupler on the front, and a die-cast metal solid coupler on the rear.
Due to the lack of magnetraction on this power unit, Lionel had a problem with gaining enough traction to pull a string of cars. Even though the motor had a "traction tire," on one power axle, this was not enough. The 1965 and 1966 productions have a metal weight secured to the underside of the body to aid in the tractive effort. This required a modification to the body to accept the screws that held this weight in place.
There are three variations: