Abstract: Coupling device for an adjuster wheel to manually start up printing machine functions, including an adjuster wheel shaft adjustably displaceable axially in stages for bringing an adjuster wheel mounted on the shaft and into and out of operative connection with drive gearing of a printing machine, shift sense, in response to axuation of the adjuster wheel shaft, in a first stage, preventing switching-on of a drive motor for the printing machine, and a clutch device, in a second step of axial adjustment of the adjuster wheel shaft, forming the operative connection of the adjuster wheel with the drive gearing of the printing machine.