Examples of these types of force exertion positions include: lifting typical bus parts, lifting and closing bus tail gates, lifting and closing paratransit vehicle tilt front engine covers, lifting electrical motors, lifting and carrying large ladders, opening and closing bus windows, climbing up and down bus steps, removing and installing streetcar wheel panels, removing and replacing bus wheel assemblies, stooping to check fuel tank gauges on propane vehicles, climbing ladders at least 10 ft. high and performing duties at unprotected heights, operating a one (1) inch air impact wrench while bending to change bus wheel/tire assemblies, removing and replacing bus drive shafts, water pumps, mufflers, starters, brake application valves, differential radius rods, air conditioner compressors, window frame assemblies, batteries, and torquing engine flywheels and kingpin bolts.