Self-contained diesel engine-driven vacuum leaf collecting machines. The leaf collector is trailer mounted, designed for one-person operation, and capable of picking up and completely mulching leaves from curb sides, median strips, ditches, open spillways, and other areas, then depositing the mulch in an integral 17, 25 or 30 cubic yard hopper. Also offered is a line of convertible (right or left pick-up) trailer mounted power driven vacuum leaf loading machines. The machine is designed for one person operation and capable of picking up leaves from curb sides, median strips, ditches, open spillways, and other areas. Further, the machine mulches the leaves and deposits them in the bed (hopper) of a tow vehicle. Many custom features are available including permanent factory mounting on a variety of truck chassis.