A pump crane for a slurry wagon or trailer (1) is disclosed, which is mounted on the slurry wagon or trailer by means of a turntable and comprises a crane arm with a plurality of intermediate parts (12, 15, 16) connected by knuckle joints (13), piping from the turntable to a hydraulic pump head (5) arranged at the outermost end of the crane arm, means for swinging, raising, lowering, unfolding and folding the crane arm, and means for pumping slurry through the piping to or from the pump head, wherein one or more of the intermediate parts comprise telescopic joints (9) so that the length of the intermediate part(s) can be varied, the piping from the turntable to the pump head is double, and solid pipe sections forming part of the piping and having substantially circular cross-sections, constitute the supporting part of the telescopic joints. Furthermore, a slurry wagon or trailer (1) comprising such a pump crane is disclosed.
