Lincoln® offers a variety of different air operated pumps like diaphragm pumps, grease pumps, and oil and fluid pumps. Diaphragm pumps work using compressed air in the middle of the pump. The oscilatiion moves the liquid through two manifolds and the outer chambers of the pump. Various different grease pumps and assemblies available. Oil and Fluid Pumps are also available which includes the Mityvac® vacuum brake bleeder.