A4VG90EP2D1/32R Rexroth A4VG Variable Pump 90cc 400bar

Product Overview

The A4VG90EP2D1/32R-NZF02F001SH / A4VG90EZ2DX/32R-NAF02F731SP-S belongs to the Bosch Rexroth A4VG series of swashplate high-pressure variable displacement axial piston pumps designed for closed-circuit hydrostatic transmissions. It offers true drop-in interchangeability with original Rexroth units—standard mounting flanges and ports—so no piping modifications are required. Every unit is 100% tested under simulated operating conditions to guarantee reliable performance in high-pressure closed systems. Featuring an integrated boost pump, high-pressure relief valves, and pressure cut-off, flow is proportional to drive speed and displacement. Multiple control options including electric proportional (EP) and two-point (EZ) deliver high power density and excellent dynamic response.

Technical Specifications 

• Model: A4VG90EP2D1/32R / A4VG90EZ2DX/32R (A4VG series 32)
• Displacement: Vg max 90 cm³/rev
• Nominal pressure: 400 bar
• Peak pressure: 450 bar
• Maximum continuous speed (at Vg max): 3050 rpm
• Control type: EP2 (electric proportional), EZ2 (two-point electric) and others
• Weight: approximately 60 kg
• Boost pump displacement: approx. 19.6 cm³/rev
• Circuit compatibility: Closed

Key Technical Advantages

1. Precision swashplate and rotating group: High volumetric efficiency with low internal leakage for excellent system energy efficiency.
2. Integrated boost and protection functions: Built-in boost pump, high-pressure relief, and pressure cut-off simplify system design.
3. High power density and dynamic response: Compact structure supports high torque output with fast control response.
4. Drop-in interchangeability and multiple control options: Standard interfaces supporting electric proportional, hydraulic, and other controls for easy upgrades.
5. Long-life bearings and reliable sealing: Designed for continuous high-pressure operation with extended service life.

Application Areas

• Propel drives on construction machinery
• Agricultural and forestry hydrostatic transmissions
• Material handling and industrial vehicles
• Cranes and special equipment
• High-pressure closed-circuit systems

Expert Maintenance Tips

Ensure suction and charge lines are adequately sized; route case drain independently. Fully bleed the system before first start-up and maintain high fluid cleanliness. Use recommended viscosity hydraulic oil and inspect filters and oil temperature regularly. Lock control settings after adjustment. For long-term storage, fill with clean oil and seal all ports to prevent corrosion.