A lifter to empty a container into a cavity of a vehicle. The lifter is movably mounted below a sill edge of the cavity, so that the lifter is beneath the vehicle when not in use. The lifter has hooks to grasp bars on the container. The lifter has devices for moving from a position beneath the vehicle to a position above the cavity for dumping the container. The lifter has devices for capturing the lower bar of the container which automatically compensates for out-of-tolerance parts in the lifter due to such things as construction or wear.
