Bosch Rexroth A10VO140 high pressure hydraulic piston pump

The Bosch Rexroth A10VO series is celebrated for its swashplate design, and the 140cc variant represents one of the larger, more powerful configurations in this family.

Swashplate Design and Variable Displacement

The A10VO140 operates on an axial piston principle utilizing a swashplate design. Inside the pump, pistons are arranged axially around a drive shaft. As the shaft rotates, the pistons ride along the angled surface of the swashplate, forcing them to reciprocate within their cylinders.

By adjusting the angle of the swashplate, the stroke length of the pistons changes, which directly alters the displacement volume. This allows the pump to provide precise, on-demand flow control, minimizing energy waste when the system demands less power.

Pressure Ratings and Performance Limits

Built to handle rigorous duty cycles, the A10VO140 boasts impressive pressure metrics:

Nominal Pressure (P_N): 280 bar (4000 psi)

Maximum Pressure (P_max): 350 bar (5100 psi)

Operating at these high-pressure thresholds allows machinery to execute heavy lifting and high-torque operations without compromising fluid velocity or system stability.

Control Options: Customizing the Fluid Power

One of the primary reasons engineers specify the Bosch Rexroth A10VO140 is its modular suite of control devices. The pump can be tailored to match the exact load-sensing or pressure-limiting requirements of your system.

DFR/DFR1: Pressure and Flow Control (Load Sensing)

The Load Sensing (LS) control system is designed to maintain a constant pressure differential across a main control valve. The pump only delivers the exact flow rate required by the actuators, significantly reducing thermal load and saving fuel or electrical energy.

DGLR: Power Control with Pressure and Flow

For applications where prime mover overload must be avoided, the DGLR control overrides flow commands to ensure that the product of pressure and flow (Flow×Pressure = Power) never exceeds the maximum power rating of the engine or electric motor.

Real-World Applications and Examples

To understand the versatility of the A10VO140, it helps to look at where it excels in the field.

1. Mobile Machinery (Construction and Mining)

In large excavators and mobile cranes, the A10VO140 often serves as the primary workhorse pump.

Example: During a heavy digging cycle, the load-sensing control detects the resistance of the soil. The pump instantly adjusts its swashplate angle to deliver maximum pressure at a reduced flow rate to break out the material, transitioning smoothly back to high flow once the bucket is moving freely.

2. Industrial Manufacturing (Plastics and Die Casting)

In stationary industrial environments, consistency and repeatability are paramount.

Example: In an injection molding machine, the A10VO140 provides the high pressure required to hold a mold clamped tight during the plastic injection phase, then quickly destokes to a near-zero flow state to conserve energy while the part cools.

Maintenance Best Practices for Longevity

High-pressure hydraulic systems require proactive maintenance to prevent catastrophic component failure.

Fluid Cleanliness: The A10VO140 relies on fine tolerances. Implement high-efficiency filtration to maintain a cleanliness level of at least ISO 20/18/15.

Case Drain Management: Always ensure the pump housing is filled with hydraulic fluid before commissioning (initial start-up) to prevent dry running. Route the case drain line directly to the reservoir without restrictions.

Temperature Monitoring: Keep operating temperatures within the recommended range of -25°C to +90°C. Excessive heat degrades seals and lowers fluid viscosity, leading to premature wear.

For more information on the A10VO140 hydraulic pump, please visit https://www.baolilaihydraulic.com/.

Specifications

Selection Table

Q1: How do I identify the control type from the model code?

A1: Look at the 10th-12th characters.

AA10VO71...DR = pressure control

ALA10VO71...DFR1 = load sensing with fixed pressure cutoff

APA10VO71...LR = torque (HP) limiting control

Q2:What is the maximum allowable case pressure?

A2:For all A10VO71 variants, the case drain pressure must remain below 2 bar (29 psi) absolute, with peaks up to 4 bar transient. Exceeding this causes shaft seal extrusion. The APA variant has a slightly higher peak tolerance (5 bar) due to reinforced seals.

Q3:How to purchase an A10VO140 hydraulic pump?

A3:You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.

Q4:What is the price and delivery time of the A10VO140 hydraulic pump?

A4:The specific price and delivery time will be provided based on the specific model you provide.