A10VO140DFR1/31R-PSD62K07 Rexroth Axial Piston Pump 140cc 280bar

Product Overview

The A10VO140 / A10VSO140 series (examples: A10VO140DFR1/31R-PSD62K07 and A10VSO140DFR1/31R-VPA12N00) is a Bosch Rexroth axial piston variable pump of swashplate design for hydrostatic drives in open circuit. Flow is proportional to drive speed and displacement and can be infinitely varied by adjusting the swashplate angle. The unit offers 100% drop-in interchangeability with genuine Rexroth pumps—no piping or mounting modifications required. Every unit undergoes full simulated operating-condition testing to guarantee high volumetric efficiency, low noise and long service life under medium-to-high pressure.

Technical Specifications 

• Model: A10VO140 / A10VSO140 (examples: A10VO140DFR1/31R-PSD62K07, A10VSO140DFR1/31R-VPA12N00, Series 31)
• Geometric displacement: 140 cm³/rev
• Nominal pressure: 280 bar
• Maximum pressure: 350 bar
• Maximum speed at Vg max: approx. 1800–2100 rpm (standard ≈ 1800 rpm; high-speed versions higher)
• Control: DFR1 (pressure and flow control, orifice in X-line closed)
• Weight (approx.): 60–65 kg
• Design features: Open circuit, swashplate design, excellent suction characteristics, two drain ports, optional through-drive (up to same nominal size)

Key Technical Advantages

1. Precision-machined swashplate and rotary group ensure flow is exactly proportional to speed and swashplate angle, with fast control response and low pressure pulsation.
2. High volumetric and overall efficiency is maintained in the medium-to-high pressure range, combined with low noise levels suitable for continuous operation.
3. DFR1 combined pressure/flow control provides load-sensing and constant-pressure functionality for low energy consumption and system stability.
4. Long-life bearings and wear-resistant materials offer high resistance to cavitation and case-pressure peaks, delivering an excellent power-to-weight ratio.
5. 100% interchangeability plus full operating-condition testing ensures exact match of mounting dimensions, ports and control characteristics with original Rexroth A10VO/A10VSO units, minimising downtime.

Application Areas

Designed for open-circuit main or auxiliary pumps in construction machinery, including excavators, wheel loaders, mobile cranes, milling machines, pavers, rollers and other construction equipment, as well as industrial power units requiring medium-to-high pressure variable flow.

Expert Maintenance Tips

1. Before installation, verify rotation direction (R = clockwise) and shaft spline match; ensure precise flange alignment and avoid radial or axial overloads.
2. Fully bleed the system before first start-up. Use mineral-oil-based hydraulic fluid meeting Rexroth specifications; recommended cleanliness ISO 4406 18/16/13 or better.
3. Periodically monitor case temperature, leakage and control settings (pressure/flow valves); maintain adequate absolute inlet pressure to prevent cavitation.
4. When changing filters and oil, inspect the swashplate, pistons and valve plate for wear. Perform preventive maintenance at the end of design life or when efficiency decreases to maximise hydraulic-system longevity.