Corrects vehicle 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. - Makes alignments including bearing loads, gear tooth contact, valve mechanisms, governors, oil systems, control linkages, clutches, hydraulics, pneumatic and traction units.