Diagnosis, removal and replacement of injectors, pistons, liners, cam shafts, cylinder heads, rod and main bearings, oil pans, clutches, fan hubs, differentials, fifth wheels, brakes, changes, or recharges batteries, and replaces transmissions and other parts. · Perform vehicle maintenance from a mobile vehicle at customer designated locations, determining vehicle condition by conducting inspections and diagnostic tests, identifying worn and damaged parts, focusing on safety, quality, and customer up time.