Job Description. Responsibilities Travel to worksites to repair large equipment, such as Excavators, Dozers, and Wheel Loaders. Complete inspections and preventive maintenance requirements. Correct vehicle deficiencies, make adjustments and alignments, and keep records. Diagnose faults and replace defective parts. Perform routine maintenance checks. Overhaul and test major components, such as engines, hydraulic systems, and electrical systems. Di...