Inspect brake systems, steering mechanisms, wheel bearings, and other important parts to ensure that they are in proper operating condition. Use handtools, such as screwdrivers, pliers, wrenches, pressure gauges, or precision instruments, as well as power tools, such as pneumatic wrenches, lathes, welding equipment, or jacks and hoists. Adjust and reline brakes, align wheels, tighten bolts and screws, and reassemble equipment. Examine and adjust protective guards, loose bolts, and specified safety devices. Perform routine maintenance such as changing oil, checking batteries, and lubricating equipment and machinery.