Construction machine and method for controlling a construction machine

The invention relates to a construction machine, road milling machine, stabiliser, recycler, surface miner, and a to method for controlling a construction machine. The construction machine has a machine frame supported by a chassis and a plurality of hydraulic systems , each of which has at least one hydraulic component , at least one hydraulic pump for conveying hydraulic fluid for the at least one hydraulic component and at least one hydraulic line for transporting the hydraulic fluid from the at least one hydraulic pump to the at least one hydraulic component. The drive device of the construction machine comprises at least one internal combustion engine . A power transmission device is provided for transmitting at least part of the drive power from the internal combustion engine to the hydraulic pumps . The construction machine according to the invention is characterised by a hydraulic control device , which is assigned to two hydraulic systems of the plurality of hydraulic systems. The hydraulic control device is designed such that, in a special operating mode, at least part of the hydraulic fluid delivered by the hydraulic pump of the one hydraulic system is supplied to the other hydraulic system