A4VSO125DR/30R-FPB13N00 Rexroth Piston Pump 125cc 350bar

Model 1: A4VSO125DR/30R-FPB13N00

Product Overview

The A4VSO125DR/30R-FPB13N00 (Rexroth material numbers R902438020 or R902515065 ) is a Bosch Rexroth A4VSO Series Series 30 swashplate-type axial piston variable displacement pump. The A4VSO Series is Rexroth’s robust high-pressure axial piston pump line for open-circuit industrial and mobile applications, with displacements covering 40 to 1000 cm³/rev. This model delivers a maximum displacement of 125 cm³/rev.

This model features DR control—Pressure Compensator control. The DR pressure controller limits the maximum pressure at the pump outlet within the control range of the variable pump, with stepless pressure adjustment in the range of 20–350 bar at the control valve. 30R denotes the Series 30 design platform with Right-hand rotation (clockwise when viewed from the shaft end) configuration. FPB13N00 is the shaft, mounting flange, and port configuration code.

As a direct OEM-equivalent replacement solution for the Bosch Rexroth A4VSO 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: A4VSO125DR/30R-FPB13N00 (A A4VSO 125 DR /30R-FPB13N00)

• Rexroth Material Numbers (MAT. NO.): R902438020 / R902515065

• Brand Series: Bosch Rexroth A4VSO Series (Series 30)

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

• Maximum Displacement: 125 cm³/rev

• Nominal Pressure: 350 bar (35 MPa)

• Peak Pressure: 400 bar (40 MPa)

• Maximum Speed (at 1 bar abs inlet): 1800 rpm

• Maximum Flow (1800 rpm, full displacement): Approx. 225 L/min

• Maximum Power (at 350 bar, full displacement): Approx. 131 kW

• Maximum Torque (at 350 bar, full displacement): Approx. 696 N·m

• Moment of Inertia: 0.03 kg·m²

• Shaft Axial Load Capacity: ±1000 N

• Shaft Radial Load Capacity: 1400 N

• Control Type: DR – Pressure Compensator

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

• Design Series: Series 30

• Mounting Type: ISO 3019-2 / SAE 4-Bolt Flange

• Shaft Type: Parallel Keyed Shaft (DIN 6885)

• Port Configuration: S (Suction), B (Pressure), L (Case Drain), X (Remote Control)

• Seal Material: NBR (Nitrile)

• Hydraulic Fluid: Mineral oils (HL, HLP), Synthetic (HFD)

• Operating Temperature Range: -20°C to +80°C

• Weight: Approx. 88 kg

Key Technical Advantages

1. DR Pressure Compensator Control for Stable and Reliable System Pressure
The DR control features a Pressure Compensator that automatically adjusts the swashplate angle in response to system pressure changes. When system pressure reaches the compensator set point, the pump reduces displacement to only the small flow required to maintain pressure, significantly reducing overflow losses and system heat generation. The pressure setting range is 20–350 bar, with stepless adjustment at the control valve.

2. 350 bar Rated Pressure with 400 bar Peak Capacity – Rugged and Durable
The A4VSO125 delivers a rated working pressure of 350 bar with peak pressures up to 400 bar. At 125 cm³/rev displacement with 1800 rpm maximum speed, it outputs approximately 225 L/min theoretical flow and approximately 131 kW of hydraulic power. The pump is “designed for industrial applications, robust and durable,” handling various heavy-duty conditions with ease.

3. Open-Circuit Dedicated Design for Flexible Application
The A4VSO Series is specifically designed for open-circuit hydrostatic drives. Output flow is proportional to drive speed and displacement. By adjusting the swashplate angle, flow is infinitely variable between maximum displacement and zero displacement. This design enables flexible adaptation to applications ranging from industrial machinery to mobile equipment.

4. High Power Density with Compact Construction
The A4VSO Series employs a swashplate axial piston design that delivers excellent power density within a compact footprint. With a moment of inertia of just 0.03 kg·m² and a weight of approximately 88 kg, the optimized construction makes it particularly suitable for space-constrained industrial and mobile applications.

5. Excellent Low-Noise Performance with Long Service Life
The A4VSO Series is renowned for its low operating noise and long service life. The high-strength cast iron housing with proven rotating group design and high-precision friction pairs ensures long-term reliability under continuous high-load operating conditions. The drive shaft can withstand both axial and radial loads, further enhancing system stability.

Application Areas

• Industrial Hydraulic Systems: Injection molding machines, presses, machine tool hydraulic systems

• Mobile Equipment: Excavators, wheel loaders, cranes, and other construction machinery hydraulic systems

• Metallurgical Equipment: Steel smelting and rolling mill hydraulic systems

• Marine Hydraulic Systems: Deck machinery, steering gear hydraulic systems

• Wind Power: Pitch control system hydraulic power units

Expert Maintenance Tips

1. Model Confirmation & Pre-Installation Inspection: Prior to installation, confirm the complete model code as A4VSO125DR/30R-FPB13N00 with Rexroth material numbers R902438020 or R902515065. This is a Series 30 right-hand rotation configuration (clockwise from shaft end)—pay special attention to matching the rotation direction with the host machine PTO. Verify that the ISO 3019-2 / SAE 4-bolt flange mounting specification matches the host machine interface. Manually rotate the shaft before installation to confirm smooth, obstruction-free rotation.

2. Fluid Cleanliness Control: Use high-quality mineral hydraulic oil (HL, HLP) or synthetic hydraulic fluid (HFD) meeting Rexroth specifications. A minimum filtration rating of ISO 18/15 is recommended. Complete system flushing is mandatory before initial start-up.

3. DR Pressure Compensator Tuning: The DR control features pressure compensator control. The compensator pressure set point can be adjusted via the control valve adjustment bolt, with a setting range of 20–350 bar. Perform initial settings under no-load conditions, then gradually increase load to target pressure with fine adjustments.

4. 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 (L port). Perform a brief jog start (5–10 seconds) to check for abnormal noise, leakage, or excessive vibration. Then start the pump and run at low load for several minutes to purge air from the pump and system lines.

5. Case Drain Port Positioning & Pressure Monitoring: During installation, ensure the drain port is positioned higher than the pump body to prevent oil starvation in the pump chamber after shutdown. Install a pressure gauge on the case drain line for real-time monitoring to ensure case pressure remains within specifications.

6. Scheduled Maintenance & Filter Replacement: Follow the maintenance intervals specified in the Rexroth A4VSO Series Service Manual (RE 92050/04.09). Pay particular attention to filter condition, fluid cleanliness, and seal integrity during routine inspections. Regular hydraulic fluid and filter replacement is essential for long-term reliable pump operation.

Model 2: AA4VSO180DRG/30R-PPB13N00

Product Overview

The AA4VSO180DRG/30R-PPB13N00 (Rexroth material number R902404121) is a Bosch Rexroth A4VSO Series Series 30 swashplate-type axial piston variable displacement pump. The A4VSO Series is Rexroth’s robust high-pressure axial piston pump line for open-circuit industrial and mobile applications, with displacements covering 40 to 1000 cm³/rev. This model delivers a maximum displacement of 180 cm³/rev.

This model features DRG control—Remote Controlled Pressure Control. The DRG pressure controller allows system pressure to be set remotely via an external remote relief valve, with stepless pressure adjustment at the control valve. 30R denotes the Series 30 design platform with Right-hand rotation (clockwise when viewed from the shaft end) configuration. PPB13N00 is the shaft, mounting flange, and port configuration code.

As a direct OEM-equivalent replacement solution for the Bosch Rexroth A4VSO 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: AA4VSO180DRG/30R-PPB13N00 (A A4VSO 180 DRG /30R-PPB13N00)

• Rexroth Material Number (MAT. NO.): R902404121

• Brand Series: Bosch Rexroth A4VSO Series (Series 30)

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

• Maximum Displacement: 180 cm³/rev

• Nominal Pressure: 350 bar

• Peak Pressure: 400 bar (Intermittent)

• Maximum Speed (at full displacement): 1800 rpm

• Maximum Flow (1800 rpm, full displacement): Approx. 324 L/min

• Maximum Power (at 350 bar, full displacement): Approx. 189 kW

• Maximum Torque (at 350 bar, full displacement): Approx. 1002 N·m

• Moment of Inertia: 0.055 kg·m²

• Shaft Axial Load Capacity: ±1400 N

• Shaft Radial Load Capacity: 1800 N

• Control Type: DRG – Remote Controlled Pressure Control

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

• Design Series: Series 30

• Mounting Type: ISO 3019-2 / SAE 4-Bolt Flange

• Shaft Type: Parallel Keyed Shaft (DIN 6885)

• Port Configuration: S (Suction), B (Pressure), L (Case Drain), X (Remote Control)

• Seal Material: NBR (Nitrile)

• Hydraulic Fluid: Mineral oils (HL, HLP), Synthetic (HFD)

• Operating Temperature Range: -20°C to +80°C

• Nominal Size (NG): 180

• Weight: Approx. 102 kg

Key Technical Advantages

1. DRG Remote Pressure Control for Remote Precision System Pressure Adjustment
The DRG control configuration adds remote control functionality to the DR pressure compensator control. By connecting an external remote relief valve to the external control port X, operators can remotely set system working pressure from a distant location (such as a control room or cabin). This design significantly improves operational convenience and safety—particularly valuable for applications requiring frequent system pressure adjustments or where pump installation locations are difficult to access.

2. 350 bar Rated Pressure with 400 bar Peak Capacity for Heavy-Duty Applications
The AA4VSO180DRG delivers a rated working pressure of 350 bar with peak pressures up to 400 bar. At 180 cm³/rev displacement with 1800 rpm maximum speed, it outputs approximately 324 L/min theoretical flow, approximately 189 kW of hydraulic power, and approximately 1002 N·m of torque.

3. Open-Circuit Dedicated Design for Flexible Application
The A4VSO Series is specifically designed for open-circuit hydrostatic drives. Output flow is proportional to drive speed and displacement. By adjusting the swashplate angle, flow is infinitely variable between maximum displacement and zero displacement.

4. High Power Density with Compact Construction
The A4VSO Series employs a swashplate axial piston design that delivers excellent power density within a compact footprint. With a moment of inertia of just 0.055 kg·m² and a weight of approximately 102 kg, it offers excellent power-to-weight ratio.

5. Excellent Suction Characteristics with Low-Noise Operation
The A4VSO Series is renowned for its excellent suction characteristics, low operating noise, and long service life. Optimized suction port design and precision-manufactured rotating groups ensure stable flow output under various operating conditions, minimizing cavitation risk. The high-strength cast iron housing with high-precision friction pairs ensures long-term reliability under continuous high-load conditions.

Application Areas

• Large Industrial Hydraulic Systems: Large injection molding machines, large presses, heavy machine tools

• Mobile Equipment: Large excavators, wheel loaders, cranes, and other construction machinery

• Metallurgical Equipment: Steel smelting and rolling mill hydraulic systems

• Marine Hydraulic Systems: Large vessel deck machinery and steering gear systems

• Wind Power: Large wind turbine pitch control system hydraulic power units

• Multi-Pump Parallel Systems: DRG control is particularly suited for coordinated pressure control when multiple A4VSO pumps operate in parallel

Expert Maintenance Tips

1. Model Confirmation & Pre-Installation Inspection: Prior to installation, confirm the complete model code as AA4VSO180DRG/30R-PPB13N00 with Rexroth material number R902404121. This is a Series 30 right-hand rotation configuration (clockwise from shaft end)—pay special attention to matching the rotation direction with the host machine PTO. The pump weighs approximately 102 kg—ensure lifting equipment has adequate capacity. Verify that the ISO 3019-2 / SAE 4-bolt flange mounting specification matches the host machine interface. Manually rotate the shaft before installation to confirm smooth, obstruction-free rotation.

2. Fluid Cleanliness Control: Use high-quality mineral hydraulic oil (HL, HLP) or synthetic hydraulic fluid (HFD) meeting Rexroth specifications. A minimum filtration rating of ISO 18/15 is recommended. Complete system flushing is mandatory before initial start-up.

3. DRG Remote Pressure Controller Tuning: The DRG control configuration adds remote control functionality to the DR pressure compensator control. During commissioning, note the following:

   • Remote Relief Valve Installation: Connect an external remote relief valve to the external control port X

   • Pressure Setting: With DRG control, pump outlet pressure equals the pump compensator setting plus the remote relief valve setting

   • Pressure Range: Setting range is 20–350 bar
     Perform initial settings under no-load conditions, then gradually increase load to target operating conditions with fine adjustments.

4. 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 (L port). Perform a brief jog start (5–10 seconds) to check for abnormal noise, leakage, or excessive vibration. Then start the pump and run at low load for several minutes to purge air from the pump and system lines.

5. Case Drain Port Positioning & Pressure Monitoring: During installation, ensure the drain port is positioned higher than the pump body to prevent oil starvation in the pump chamber after shutdown. The AA4VSO180DRG’s large displacement (180 cc) means higher case drain flow—ensure the drain line has adequate diameter to avoid excessive back pressure. Install a pressure gauge on the case drain line for real-time monitoring.

6. Scheduled Maintenance & Filter Replacement: Follow the maintenance intervals specified in the Rexroth A4VSO Series Service Manual (RE 92050/04.09). Pay particular attention to filter condition, fluid cleanliness, and seal integrity during routine inspections. Regular hydraulic fluid and filter replacement is essential for long-term reliable pump operation.