For example, they use tachometers and dynamometers to locate engine malfunctions. When working on electrical systems, heavy equipment mechanics use ohmmeters, ammeters, and voltmeters. Mechanics often lift heavy parts and tools, handle greasy and dirty parts, and stand or lie in awkward positions, to repair vehicles and equipment. Mechanics usually work in well-lighted, heated, and ventilated areas. However, some shops are drafty and noisy.
Many employers provide uniforms, locker rooms, and shower facilities.
When mobile heavy equipment breaks down at a construction site, it may be too difficult or expensive to bring it into a repair shop, so the shop often sends a field service mechanic to the job site to make repairs. Field service mechanics work outdoors and spend much of their time away from the shop. Generally, more experienced mobile heavy equipment mechanics specialize in field service. They usually drive trucks specially equipped with replacement parts and tools. On occasion, they must travel many miles to reach disabled machinery.