buy EX1900-5 EX1900-6 Hydraulic Pump Assy Excavator K3V180DTH Main Pump 4689079 4626845 for Hitachi

Main Pumps: 2 × 180 CC/REV (total 360 CC/REV), aligning with Kawasaki’s K3VG series standards .

Gear Pump: ~50 cc/rev (auxiliary functions like pilot control).

Max Flow: ~360 L/min (main pumps) + 50 L/min (gear pump) at 1,800 RPM.

Rated Flow: 320–340 L/min (main pumps) under typical load conditions .

Rated Pressure: 34.3 MPa (350 bar / 5,076 psi) for continuous operation .

Max Pressure: 39.2 MPa (398 bar / 5,685 psi) for short-term peak loads.