Prerequisites: JDAT1140 and JDAT1142 Theory, function, and operation of gears, chains, clutches, drive lines, differentials, and transmissions. Design, construction, operation, and service methods of bearings, seals, and shafts. Theory of power transmission from engine to traction wheels. Compete disassembly, inspection, and reassembly of John Deere clutches, 2-speed planetary, differentials, final drives as used in John Deere Equipment. Introduction to basic hydraulic concepts, principles, symbols and safety. Theory and construction of open-center and closed-center systems, pumps, valves, cylinders, motors, accumulators, and testing equipment as used on John Deere Equipment.