including a flange member adjacent a lower surface of said motor;
(b) an outwardly-extending output shaft connected to said motor in a position such that a longitudinal axis thereof extends substantially perpendicular to a lower surface of such floor of such railway car;
(c) an air compressor including a flange member adjacent an upper surface of said air compressor;
(d) bolt means engageable with each of said flange member on said motor and said flange member on said mini compressor for connecting said air compressor to said motor;
(e) an input shaft connected to said air compressor in a position such that a longitudinal axis thereof will be in substantial alignment with said longitudinal axis of said output shaft when said air compressor is connected to said motor;
(f) a coupling means for connecting said output shaft of said motor with said input shaft of said mini air compressor; and
(g) a mounting means connected to said motor for providing the sole mounting for said unit to such floor of such railway car.