Grease Pump, 400 Lb (55 Gal), 50:1 Ratio, 8400 Max PSI - GRACO 239888

• UPC   633955791701
• Reliable Flow - A 3 inch (76.2 mm) differential air motor and the double-acting pump design provides reliable fluid flow and accurate dispense. Durable - Thick cast aluminum air motor housing offers unmatched durability. Fewer Repairs - Fewer moving parts in the air motor assembly means less downtime and low repair cost. Extended Seal Life - In-line pump design aligns the air motor piston and fluid piston rods to maximize seal life. Reduce Downtime - Displacement rods have minimal wear due to a proprietary Graco manufacturing process. Superior Sealing - Non-metallic poppet valves offer positive sealing performance, even with contaminated "dirty" air environments for long life without repair. Reduced Icing - Large air porting design provides efficient use of compressed air supply for continuous pump operation and reduced icing. Corrosion-Resistant - Corrosion-resistant design utilizes liquid salt nitriding, nickel plating, stainless steel, aluminum and chrome on key components for longer life.