PM45 - 40:1 ratio grease pumps 531 420 mounted onto an air operated inductor plate for use with high viscosity, hard to pump greases directly from 185 kg drum, when the double lip inductor plate is attached to the lower end of the pump tube, it exerts pneumatic, weight and atmospheric pressure on the material forcing pump priming. The inductor plate also serves as protection against contaminants and eliminates material waste. There are two Power Ram models. The AUTOMATIC Power Ram includes: Pump air connection accessories, On / Off control of the pump, Up / Down control of the ram for easy drum exchange, two independent air pressure regulators, one for the pump and the other for the power ram cylinders, pump / Ram independent air pressure gauge, automatic empty drum pump shut-off safety feature, automatic vacuum release. The AUTOMATIC Power Ram includes the same features as the Basic model plus: · Pump air connection accessories. · On / Off control of the pump. · Up / Down control of the ram for easy drum exchange. · Two independent air pressure regulators, one for the pump and the other for the power ram cylinders. · Pump / Ram independent air pressure gauge. · Automatic empty drum pump shut-off safety feature. · Automatic Vacuum release.