The machine is hooked to the over head crane and has switch control unit to operate and run the machine over the moulds. Concrete is placed via the distribution system in the receiving hopper. This hopper is fitted with a hydraulically operated clam-shell door. The operator walks alongside the machine and is able to continuously monitor and thus control the concrete flow into the control hopper by using the clam-shell door. The concrete then feeds directly from the control hopper into the moulds cells. Poker vibrations, which are mounted on the machine, are positioned over each cell to ensure even compaction of the concrete.