The invention relates to a device for maintaining and/or repairing a construction machine, with a mobile maintenance station that can be placed at the jobsite where the construction machine is being used, comprising a 3D printer for printing replacement parts for the construction machine on the basis of component data and/or a mobile display device for displaying repair information on the construction machine on the basis of component data, wherein a data supply station that is at a separate location from the maintenance station is provided, can be connected to the maintenance station by way of a communication link and is configured for providing the maintenance station with 3D printing data for printing the replacement part, and the maintenance station is configured for printing the replacement part layer by layer on the basis of the 3D printing data received from the data supply station.