The Vulcan Sight Feed Line Oiler, which uses an injection similar to a carburettor. This is similar in concept to the McCall Lubricator featured on many Raymond rigs. The lubricant tank is integral to the unit, below the air/steam inlet/outlet. Simple in concept and operation, it made it easy to keep the cylinder lubricated. This oiler is lubricating Vulcan’s experimental Single/Compound hammer; usually the oilers were mounted on the air compressor or near the boiler in a more permanent fashion.