This guide contains a course outline for a tractor mechanic course. The outline is organized by 15 duties: performing general skills and maintaining and servicing storage battery, ignition circuit, the cooling system, the charging circuit, the starting circuit, gasoline fuel system, diesel fuel system, basic engine, lubrication system, clutches, hydraulics, powertrain, differentials, and final drive. Each duty is further divided into job-relevant tasks. These components are provided for each task: standard of performance of task, source of standard, conditions for performance of task, enabling objectives, resources, teaching activities, a criterion-referenced measure (practical application and method of evaluating practical applications), and a performance checklist for evaluation. Appendixes include definitions of terms; a cross-reference of duties, tasks, and performance objectives; a tool and equipment list; and a bibliography. (YLB)