A hydraulic tilting device for tilting a cab of a vehicle between a driving position and a tilted position, which cab is resiliently supported on the chassis of the vehicle. The tilting device includes a reservoir for hydraulic fluid and a pump which is connected to the reservoir. The tilting device also includes a double-acting hydraulic tilting cylinder for tilting the cab. At the tilting cylinder there is a lost-motion passage which extends between ports which open out into the cylinder space of the tilting cylinder, which ports are respectively in communication with the pressure chamber and the pull chamber of the tilting cylinder if the piston-piston rod assembly is in the lost-motion range defined by the ports. The tilting device is designed in such a manner that the reciprocating movements of the piston-piston rod assembly within the lost-motion range can take place with as little obstacle as possible.