This document contains the occupational duty/task lists for 11 occupations in the diesel mechanics series. Each occupation is divided into a number of duties. A separate page for each duty in the occupation lists the tasks in that duty along with its code number and columns to indicate whether that particular duty has been taught and to provide space for comments. The occupations are tool room attendant; electrical repairman; cab climate control repairman; mechanic's helper; transmission/final drive mechanic; engine repairman; tune-up technician (fuel systems); hydraulics repairman; frame, suspension (brakes) and steering repairman; service/maintenance person (tires and detail); and farm equipment repair person. The occupational duty/task lists are the result of an extensive two-step development process in which information on current occupational requirements was gathered from such sources as consortia, trade associations, and current curriculum materials and was then synthesized by industry representatives, vocational instructors, and state-level representatives. (KC)