Graco 24W337 Gt 750 36:1 Grease Transfer Pump For 400 Lb (180 Kg). Pail With Bung Adapter - NptThe GT 750 pump was engineered to perform in challenging applications and changing environments. The large 7. 5 inch (190 mm) air motor and pump lower combination allows the GT 750 pump to move the same amount of grease with up to four times fewer pump strokes. Efficient Air Motor Use less air to move more grease. High Flow Rates Up to 32 lb min (13. 6 kg min) of grease. High Volume Per Stroke Pump more grease without having to drive pump too quickly