Fixed Displacement Pump Piston Pump 163-2428 350bar Bulldozer Hydraulic Pump Product Introduction The 163-2428 is a high-performance tandem axial piston hydraulic pump, specifically engineered to meet the demanding operational requirements of heavy construction machinery. Constructed with a robust cast-iron housing and precision-machined internal components, this pump ensures exceptional durability and stability under high-pressure, high-flow conditions. Its core advantage