Abstract: A carrier portion is connected by tilt cylinders and lift booms to the front end of a conventional earth working machine. A bucket portion for loading, carrying and discharging materials is positioned between a pair of forwardly extending arm members of the carrier portion. Sidewalls of the bucket portion are positioned adjacent the arm members and include a pivot arm assembly for pivotally connecting the bucket portion to the arm members. A pair of piston cylinder assemblies are connected to the carrier portion and to the upper end of the pivot arm assembly. Actuation of the piston cylinder assemblies pivots the bucket portion on the carrier arms to move the bucket portion in an arcuate path toward and away from the carrier portion. When the loader bucket assembly is raised by the lift booms to the maximum vertical height for discharging the contents of the bucket portion, a hydraulic control system actuates the tilt cylinders to first pivot the carrier portion together with the bucket portion forwardly.