Abstract: An improvement in vehicle power take-off equipment is disclosed wherein a generator is affixed to the rear of the housing of a rotary air compressor of the type that is driven from a vehicle power take-off to an input shaft at its front end. The generator's housing is attached to the rear end of the air compressor's housing and the generator includes an armature mounted for rotation in the generator's housing. A rotary shaft extension projects from the rear of the air compressor. The armature receives the extension shaft and is coupled thereto by a friction fit and a threaded stud therebetween so that the armature turns with the extension shaft. The extension shaft is coupled for operation by the input shaft of the compressor so that both compressor and generator are directly operated by the input shaft of the compressor.