A10VG18MD1/10R-NSC16F004S-S Rexroth Closed Circuit Pump 18 cm³ 300 bar

Product Overview

The A10VG18MD1/10R-NSC16F004S-S and A10VG63EZ2DM1/10R-NSC10K023EH-S belong to the Bosch Rexroth A10VG series of closed-circuit variable displacement axial piston pumps (sizes 18…63). Featuring a swash-plate design for hydrostatic closed-circuit transmissions, flow is proportional to drive speed and displacement and is infinitely variable. Swivelling the pump over centre smoothly changes the direction of flow. Fully interchangeable with genuine Rexroth units, these pumps enable direct drop-in replacement without modification to mounting interfaces or piping. Every unit undergoes 100% simulated operating-condition testing to ensure high efficiency and reliability in the medium-to-high pressure range.

Technical Specifications 

• Model: A10VG18MD1/10R-NSC16F004S-S / A10VG63EZ2DM1/10R-NSC10K023EH-S
• Displacement (Vg max): A10VG18 approx. 18 cm³/rev; A10VG63 approx. 63 cm³/rev
• Continuous / Rated Pressure: up to 300 bar
• Peak / Intermittent Pressure: up to 350 bar
• Continuous Max. Speed (at Vg max): A10VG18 4000 rpm; A10VG63 3000 rpm
• Control Type: Variable (MD mechanical, EZ electric switching, etc., code dependent)
• Design: Swash-plate axial piston, closed circuit (with integral boost pump)
• Weight: A10VG18 approx. 14–18 kg; A10VG63 approx. 39 kg
• Brand / Series: Bosch Rexroth A10VG closed-circuit variable piston pump

Key Technical Advantages

1. Closed-Circuit Medium-High Pressure Design: Continuous rating of 300 bar and peak of 350 bar, optimized for hydrostatic transmissions, deliver high power density in a compact package.
2. Infinitely Variable Displacement & Bidirectional Flow: Displacement is steplessly adjustable from 0 to Vg max. Crossing centre smoothly reverses flow direction, ideal for reversible drive systems.
3. Integral Boost Pump & Safety Valves: Built-in boost pump supplies make-up and control oil. High-pressure relief valves protect the transmission from overload, enhancing system reliability.
4. Versatile Controls & High Efficiency: Supports mechanical, hydraulic, electric proportional and other control options. Optimized swash-plate geometry maintains high volumetric efficiency and low noise.
5. True Interchangeability & Long Service Life: Fully compatible with OEM mounting dimensions and interfaces. High-load bearings and precision manufacturing ensure reliable long-term operation.

Application Areas

• Travel drive systems on compact construction machinery
• Agricultural and forestry equipment hydrostatic transmissions
• Industrial closed-circuit hydraulic drive systems
• Auxiliary drives on port and material-handling equipment
• Any mobile or stationary application requiring bidirectional variable control

Expert Maintenance Tips

1. Ensure proper drive-shaft alignment during installation; use a flexible coupling and avoid excessive radial/axial loads. Verify correct closed-circuit piping connections.
2. Use anti-wear hydraulic oil meeting ISO cleanliness and viscosity requirements; system filtration should be at least 10 μm. Thoroughly bleed air and check case and boost pressure before initial start-up.
3. Regularly monitor boost pressure and case drain to prevent cavitation or over-pressure. Verify control signals and relief valve settings.
4. During service, inspect pistons, cylinder block and valve plate for wear; replace complete rotating groups when necessary. Store long-term units in a dry environment and rotate the shaft periodically.