When purchasing a 20-ton excavator, how does the hydraulic pump type determine working efficiency and fuel consumption?

• Choose load-sensing variable piston pumps; 15%-25% more efficient than gear pumps.
• Match main pump displacement to engine power to avoid sluggish response.
• Verify proportional solenoid valves for coordinated compound movements.
• Require pump brand and model; Kawasaki/Rexroth outperform generic brands.
• Request pump control curves to validate flow-pressure efficiency.