A11VLO190LR Variable Axial Piston Pump

A11VLO190LR Variable Axial Piston Pump

2 month ago

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 4 year year

Product details

A11VLO190LR Variable Axial Piston Pump

1. Product Overview

The A11VLO190LR variable axial piston pump is a high-performance swashplate hydraulic piston pump originally developed by Rexroth for heavy-duty mobile machinery. As the core power source of the hydraulic system, this pump adopts LR load-sensing control. It automatically adjusts displacement and output flow according to actual load demands to realize power matching and energy saving.

Produced in strict accordance with original installation dimensions and interface standards, the pump can be used as aftermarket replacement spare parts for construction machinery maintenance and delivers stable performance under continuous heavy-load working conditions.

Model Code Definition

- A11VLO: Series code of open-circuit axial piston pump

- 190: Theoretical displacement of 190 cm³/r

- LR: Load sensing control equipped with pressure cut-off function

2. Main Technical Parameters

Item Specification

Structure Type Swashplate variable displacement axial piston pump

Nominal Displacement 190 cc/rev

Control Mode LR Load sensing control

Rated Operating Pressure 35 MPa

Maximum Peak Pressure 40 MPa

Maximum Allowable Rotating Speed 2200 rpm

Working Medium ISO VG46 / VG68 anti-wear hydraulic oil

Operating Temperature Range -20℃ ~ +90℃

Standard Seals NBR; FKM high-temperature seals optional

3. Working Principle

The engine drives the pump cylinder block to rotate. The pistons reciprocate against the swashplate to complete oil suction and discharge.

The built-in load sensing valve captures pressure signals from actuators within the hydraulic system. When the load requires less flow, the control mechanism reduces the tilt angle of the swashplate to decrease pump displacement. When higher flow is needed, the swashplate angle increases to raise displacement.

This dynamic adjustment avoids redundant power loss and reduces heat generation of the hydraulic system. The integrated pressure cut-off function limits the maximum working pressure and protects hydraulic components against overload damage.

4. Core Advantages

1. Advanced LR load sensing control with outstanding energy-saving performance to effectively cut fuel consumption.

2. High pressure resistance and high power density, suitable for long-term heavy-duty operation.

3. Smooth flow regulation, low vibration and low operating noise.

4. Strong contamination resistance, adaptable to harsh construction site environments.

5. Standard connection dimensions for direct replacement of original pumps without modification.

6. Optimized internal friction pair structure for extended service life.

5. Application Range

As the main power unit of the hydraulic system, this hydraulic piston pump is widely fitted on large excavators, mining loaders, road rollers and other heavy mobile construction machinery.

6. Common Faults & Replacement Suggestion

Typical failures: Insufficient output pressure, slow movement of hydraulic actuators, excessive internal leakage, abnormal mechanical noise, oil leakage at shaft seal.

Check the cleanliness of hydraulic oil and filter status first. Replace the complete pump assembly if serious wear occurs on the valve plate, pistons and cylinder block.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 Audited supplier

4 year

Address: Ningbo, China

Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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