These instructions are published for the information and guidance of all concerned. They contain information on operation and maintenance of the equipment as well as description of major units and their functions in relation to other components of this bulldozer. They apply only to the bulldozers M1 and MIA1 and are arranged in five parts: Part One, Introduction; Part Two, Operating Instructions; Part Three, Maintenance Instructions; Part Four, Auxiliary Equipment; and Part Five, Repair Instructions.