This shop guide gives graphic illustration of twenty-eight learning stations in a tractor mechanics shop, at each of which a specific learning activity occurs. The authors suggest that each station (most of them constructed of plywood or sheet metal and angle iron) be self-contained, having its own appropriate tools, supplies, parts, and set of instructions so that students may proceed at their own pace with minimal supervision. Each learning station description covers use (e.g., to polarize the generator, replace the rear ark, or measure piston ring clearance), special instructions to the teacher, tools and supplies needed, and simulator materials. Subject areas covered include electrical (battery, alternator, generator, starter, spark plugs, and ignition), fuel system (carburetor, fuel pump, injectors, and filters), cooling system, bearings and mechanicals (seals, bearings, gaskets, and clutch), and main engine block parts (pistons, valves and assemblies, connecting rods, crankshaft, and timing gear). (CP)