The material-conveyor and hopper unit serves for transport of ballast, sand gravel mixture or spoil materials. The main advantage of the MFS 40 is the mechanised conveying, storing and loading operation.
The material is loaded into the hopper either from an attached unit of the same type, an excavating machine, ballast cleaning machine or from a formation rehabilitation machine. The material can be either stored in the hopper or transferred into the next MFS in front. Any number of such units may be used; the leading unit is always the first one to be loaded, the trailing units serve as a conveying system.