A11VO260EP2G/11R-NZD12K67RH-S Rexroth Piston Pump 260cc 350bar

Model 1: A11VO260EP2G/11R-NZD12K67RH-S

Product Overview

The A11VO260EP2G/11R-NZD12K67RH-S is a Bosch Rexroth A11VO Series swashplate-type axial piston variable displacement pump. The A11VO Series is specifically designed for open-circuit hydrostatic drives and is a classic benchmark product in the heavy-duty mobile machinery sector. The full series covers eight displacement sizes—40, 60, 75, 95, 130, 145, 190, and 260—with the A11VO260 representing the largest displacement model in the series.

This model features EP2G control—Electro-Proportional control with Pressure Cut-off functionality. EP2G control enables remote displacement adjustment via electronic control systems, meeting the automation requirements of intelligent equipment, while the integrated pressure cut-off function automatically reduces displacement to near zero when system pressure reaches the set point, preventing system overload. 11R denotes the Series 11 design platform with Right-hand rotation configuration. NZD12K67RH-S is the shaft, mounting flange, and port configuration code.

As a direct OEM-equivalent replacement solution for the Bosch Rexroth A11VO Series, this product offers complete in-situ interchangeability, strictly adhering to Rexroth’s original design specifications and mounting interface standards. Every unit undergoes 100% simulated duty-cycle testing, ensuring that key performance metrics—including volumetric efficiency, pressure-flow characteristics, and case drain flow at rated pressure and full displacement—meet or exceed original factory specifications.

Technical Specifications (Bulleted List)

• Model Number: A11VO260EP2G/11R-NZD12K67RH-S

• Brand Series: Bosch Rexroth A11VO Series

• Pump Type: Swashplate Axial Piston Variable Displacement Pump (Open Circuit)

• Maximum Displacement: 260 cm³/rev

• Rated Pressure (Continuous): 350 bar

• Peak Pressure (Intermittent): 400 bar

• Enhanced Peak Pressure (Specific Versions): 420 bar (short-term)

• Maximum Speed (at Vg max): 1800 rpm

• Maximum Speed (at Vg ≤ Vg max): 2300 rpm

• Theoretical Flow (1800 rpm, Vg max): 468 L/min

• Theoretical Power (350 bar, Vg max): 273 kW

• Theoretical Torque (350 bar, Vg max): 1448 N·m

• Control Type: EP2G – Electro-Proportional Control + Pressure Cut-off

• Series Version: 11R – Series 11, Right-hand Rotation

• Rotation Direction: Right-hand (clockwise from shaft end)

• Mounting Type: SAE Flange Mounting

• Shaft Type: Splined Shaft (DIN 5480)

• Self-Priming Capability: Self-priming, tank pressurization, or optional built-in charge pump (impeller)

• Through-Drive Capability: 100% through-drive for gear pumps or axial piston pumps of the same size

• Housing Material: High-strength Cast Iron

• Hydraulic Fluid: Mineral Oil

• Recommended Filtration: ISO 18/15 or higher

• Weight: Approx. 100–110 kg (configuration dependent)

Key Technical Advantages

1. EP2G Electro-Proportional Control + Pressure Cut-off – Intelligence and Safety Combined
The EP2G control configuration combines electro-proportional displacement adjustment with pressure cut-off functionality. Electro-proportional control enables remote, precise displacement adjustment via PLC or dedicated controllers, meeting the automation requirements of intelligent equipment. The pressure cut-off function automatically reduces displacement to near zero when system pressure reaches the set point, effectively preventing system overload damage. Together, these features deliver both control flexibility and system safety.

2. 350 bar High-Pressure Rating with 400 bar Peak Capacity
The A11VO260 delivers a rated working pressure of 350 bar with peak pressures up to 400 bar. Specific enhanced versions can withstand 420 bar short-term peak pressure. This pressure rating is among the industry’s highest for open-circuit piston pumps, enabling the pump to withstand extreme pressure shocks encountered in heavy-duty mobile equipment applications.

3. 100% Through-Drive for Flexible Multi-Pump System Expansion
The A11VO Series features 100% through-drive capability as standard, allowing gear pumps or axial piston pumps of the same size to be mounted directly on the rear of the pump without the need for an additional power divider. This design significantly simplifies multi-pump system layouts and saves installation space, making it particularly suitable for complex hydraulic systems requiring multiple circuit supplies.

4. High-Precision Friction Pairs for Extended Service Life
The A11VO Series incorporates high-precision friction pairs featuring a spherical distribution plate combined with hydrostatic-supported copper alloy sliding shoes. This design offers self-compensating wear capability, maintaining volumetric efficiency above 94% during long-term operation. Combined with optimized bearings and rotating groups, the pump ensures long-term reliability under continuous high-load conditions.

5. Superior Self-Priming Capability with Flexible Inlet Conditions
The A11VO Series supports self-priming operation, tank-pressurized operation, and an optional built-in charge pump (impeller) . This design significantly enhances cavitation resistance at high speeds, ensuring stable flow output even under challenging inlet conditions—including cold starts, high-altitude operation, and low inlet pressure scenarios.

6. Broad Flow Adjustment Range with Exceptional Control Flexibility
The A11VO260 enables stepless flow adjustment from 0 to 260 cm³/rev. Output flow is proportional to drive speed and infinitely variable between maximum displacement and zero displacement. The EP2G electro-proportional control further enhances flow regulation precision and response speed.

Application Areas

• Excavators: Primary pump providing high-pressure, high-flow power for travel and working functions

• Rotary Drilling Rigs: Meeting the dual demands of high pressure and high flow for drilling operations

• Concrete Pump Trucks: Delivering stable, continuous high-pressure hydraulic power for pumping systems

• Mining Equipment: Suitable for roadheaders, scraper loaders, and other equipment operating in high-dust, high-vibration extreme environments

• Industrial & Specialized Applications: Injection molding machines, hydraulic presses, port cranes, and other scenarios with stringent hydraulic power stability requirements

Expert Maintenance Tips

1. Model Confirmation & Pre-Installation Inspection: Prior to installation, confirm the complete model code as A11VO260EP2G/11R-NZD12K67RH-S. This is a Series 11 right-hand rotation configuration. Verify that the SAE mounting flange specification and splined shaft type (DIN 5480) match the host machine PTO interface. Manually rotate the shaft before installation to confirm smooth, obstruction-free rotation.

2. Fluid Cleanliness Control: The A11VO Series recommends a minimum filtration rating of ISO 18/15. Replace hydraulic fluid and filters every 1,000–2,000 hours. Complete system flushing is mandatory before initial start-up.

3. Electro-Proportional Controller Tuning: The EP2G control configuration includes both electro-proportional adjustment and pressure cut-off functions. Commissioning requires coordination with a proportional amplifier or PLC controller for parameter setting. The pressure cut-off set point should be configured based on the system’s maximum working pressure—typically recommended at 10–15% above rated pressure (i.e., 385–400 bar range) to ensure timely protection against abnormal high pressure.

4. Inlet Condition Assurance: Although the A11VO Series offers excellent self-priming capability, ensure suction line inlet pressure meets requirements. For high-speed applications, the built-in charge pump (impeller) version is recommended to enhance cavitation resistance. Keep suction lines as short and straight as possible, avoiding unnecessary bends and restrictions.

5. Initial Start-Up & Priming: Before first start-up, pre-lubricate the pump by filling the housing with clean hydraulic fluid through the case drain port. Perform a brief jog start (5–10 seconds) to check for abnormal noise, leakage, or excessive vibration. Then正式 start the pump and run at low load for several minutes to purge air from the pump and system lines.

6. Case Drain Port Positioning: During installation, ensure the drain port is positioned higher than the pump body to prevent oil starvation in the pump chamber after shutdown, avoiding dry running and core component damage during restart.

Model 2: A11VO130DRG/10L-VZD12N00-S

Product Overview

The A11VO130DRG/10L-VZD12N00-S is a Bosch Rexroth A11VO Series swashplate-type axial piston variable displacement pump. The A11VO Series is specifically designed for open-circuit hydrostatic drives and is a classic benchmark product in the heavy-duty mobile machinery sector. The full series covers eight displacement sizes—40, 60, 75, 95, 130, 145, 190, and 260—with the A11VO130 delivering 130 cm³/rev displacement.

This model features DRG control—Remote Pressure Control. DRG control allows the pump’s working pressure to be remotely set via an external pilot pressure source, making it ideal for applications requiring remote system pressure adjustment. 10L denotes the Series 10 design platform with Left-hand rotation configuration. VZD12N00-S is the shaft, mounting flange, and port configuration code.

As a direct OEM-equivalent replacement solution for the Bosch Rexroth A11VO Series, this product offers complete in-situ interchangeability, strictly adhering to Rexroth’s original design specifications and mounting interface standards. Every unit undergoes 100% simulated duty-cycle testing, ensuring that key performance metrics—including volumetric efficiency, pressure-flow characteristics, and case drain flow at rated pressure and full displacement—meet or exceed original factory specifications.

Technical Specifications (Bulleted List)

• Model Number: A11VO130DRG/10L-VZD12N00-S

• Brand Series: Bosch Rexroth A11VO Series

• Pump Type: Swashplate Axial Piston Variable Displacement Pump (Open Circuit)

• Maximum Displacement: 130 cm³/rev

• Rated Pressure (Continuous): 350 bar

• Peak Pressure (Intermittent): 400 bar

• Maximum Speed (at Vg max): 2100 rpm

• Maximum Speed (at Vg ≤ Vg max): 2500 rpm

• Theoretical Flow (2100 rpm, Vg max): 273 L/min

• Theoretical Power (350 bar, Vg max): 159 kW

• Theoretical Torque (350 bar, Vg max): 724 N·m

• Control Type: DRG – Remote Pressure Control

• Series Version: 10L – Series 10, Left-hand Rotation

• Rotation Direction: Left-hand (counter-clockwise from shaft end)

• Mounting Type: SAE 4-Bolt Flange (D – SAE J744)

• Shaft Type: Splined Shaft (Z – DIN 5480)

• Port Configuration: 12 – SAE side pressure/suction ports, metric fastening thread (DIN 13) with O-ring sealing groove (DIN 3852)

• Self-Priming Capability: Self-priming, tank pressurization, or optional built-in charge pump (impeller)

• Through-Drive Capability: 100% through-drive for gear pumps or axial piston pumps of the same size

• Housing Material: High-strength Cast Iron

• Hydraulic Fluid: Mineral Oil

• Recommended Filtration: ISO 18/15 or higher

• Weight: Approx. 66 kg

Key Technical Advantages

1. DRG Remote Pressure Control for Remote Precision Pressure Adjustment
The DRG control configuration enables remote setting of the pump’s working pressure via an external pilot pressure source. Operators can adjust pressure settings from the control room or cabin without approaching the pump body, significantly improving operational convenience and safety—particularly valuable for applications requiring frequent system pressure adjustments.

2. 350 bar High-Pressure Rating with 400 bar Peak Capacity
The A11VO130 delivers a rated working pressure of 350 bar with peak pressures up to 400 bar. At 130 cm³/rev displacement, it outputs 724 N·m of torque and 159 kW of power, providing ample hydraulic power reserves for medium-sized mobile equipment.

3. 100% Through-Drive for Flexible Multi-Pump System Expansion
The A11VO Series features 100% through-drive capability as standard, allowing gear pumps or axial piston pumps of the same size to be mounted directly on the rear of the pump. This design enables the A11VO130DRG/10L-VZD12N00-S to serve as the lead pump in multi-pump systems, providing drive power for subsequent pump stages and significantly simplifying system layout.

4. High-Precision Friction Pairs for Extended Service Life
The A11VO Series incorporates high-precision friction pairs featuring a spherical distribution plate combined with hydrostatic-supported copper alloy sliding shoes. This design offers self-compensating wear capability, maintaining volumetric efficiency above 94% during long-term operation. Combined with optimized bearings and rotating groups, the pump ensures long-term reliability under continuous high-load conditions.

5. Compact Design with Lightweight Advantage
The A11VO130 weighs approximately 66 kg, offering a significant lightweight advantage among piston pumps in its displacement class. The compact footprint and lightweight characteristics make it particularly suitable for mobile equipment with strict installation space and vehicle weight constraints.

Application Areas

• Medium-Sized Excavators: Primary pump providing hydraulic power for travel and working functions

• Wheel Loaders: Meeting the combined flow and pressure demands of loading operations

• Agricultural Machinery: Hydraulic drive systems for large combine harvesters and tractors

• Material Handling Equipment: Hydraulic systems for forklifts and reach stackers

• Industrial Applications: Injection molding machines, hydraulic presses, and other scenarios with stringent hydraulic power stability requirements

• Lead Pump for Multi-Pump Systems: Utilizing through-drive capability to串联 subsequent pump stages

Expert Maintenance Tips

1. Model Confirmation & Pre-Installation Inspection: Prior to installation, confirm the complete model code as A11VO130DRG/10L-VZD12N00-S. This is a Series 10 left-hand rotation configuration—pay special attention to matching the rotation direction with the host machine PTO. Verify that the SAE 4-bolt flange mounting specification and splined shaft type (DIN 5480) match. Manually rotate the shaft before installation to confirm smooth, obstruction-free rotation.

2. Fluid Cleanliness Control: The A11VO Series recommends a minimum filtration rating of ISO 18/15. Replace hydraulic fluid and filters every 1,000–2,000 hours. Complete system flushing is mandatory before initial start-up.

3. Remote Pressure Controller Tuning: The DRG control configuration sets pump working pressure via an external pilot pressure source. During commissioning, confirm that the pilot pressure source range matches the DRG controller’s setting range. A fixed proportional relationship exists between pilot pressure and main system pressure—refer to the Rexroth A11VO Series technical manual for the specific ratio. Perform initial setting under no-load conditions, then gradually increase load to target pressure with fine adjustments.

4. Left-Hand Rotation Port Identification: This model features left-hand rotation—suction and pressure port positions are reversed compared to right-hand versions. During installation, carefully cross-reference piping diagrams to ensure suction and pressure lines are correctly connected to the corresponding ports. The port configuration is SAE side pressure/suction ports (12 configuration) with metric fastening threads (DIN 13) and O-ring sealing grooves (DIN 3852).

5. Initial Start-Up & Priming: Before first start-up, pre-lubricate the pump by filling the housing with clean hydraulic fluid through the case drain port. Perform a brief jog start (5–10 seconds) to confirm correct rotation direction (left-hand), and check for abnormal noise or leakage. Then正式 start the pump and run at low load for several minutes to purge air from the pump and system lines.

6. Case Drain Port Positioning: During installation, ensure the drain port is positioned higher than the pump body to prevent oil starvation in the pump chamber after shutdown, avoiding dry running and core component damage during restart.