Corrects equipment deficiencies by removing, repairing, adjusting, overhauling, assembling, disassembling, and replacing major assemblies, sub-assemblies, components, parts, or systems, such as, power and drive trains, electrical, air conditioning, fuel, emission, brake, steering, hydraulics; completes machine shop operations; making adjustments and alignments including bearing loads, gear tooth contact, valve mechanisms, governors, oil systems, control linkages, clutches, and traction units. Inspect, analyze, test, measure, repair and perform full or partial overhauls on any of the assemblies and sub-assemblies of heavy-duty Diesel engines and gas powered equipment.