china Excavator ZAX330 ZAX350 ZAX360 EX300 EX330 EX350 Main Pump HPV145 Hydraulic Pump

Main Pumps: Likely 2 × 145 cc/rev (total 290 cc/rev), based on Hitachi’s medium excavator pump standards (e.g., K3V112 for ZX200-5 uses 112 cc/rev) .

Gear Pump: ~30–50 cc/rev (auxiliary functions like pilot control).

Max Flow: ~290 L/min (main pumps) + 50 L/min (gear pump) at 1,900 RPM.

Rated Flow: 250–270 L/min (main pumps) under typical load conditions.

Rated Pressure: 34.3–35.0 MPa (350–357 kgf/cm² / 4,975–5,076 psi) for working circuits .

Max Pressure: 38.0–40.0 MPa (388–408 kgf/cm² / 5,511–5,801 psi) for short-term peak loads.