Rexroth Main Pump Spare Parts Model: A11VO190, A11VO260

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Rexroth A11VO190 / A11VO260 Main Pump Spare Parts Details (with Embedded Keywords)

For construction machinery and road machinery, we offer a full range of Rexroth Main Pump Spare Parts. Both the A11VO190 and A11VO260 are heavy-duty Hydraulic piston pumps (axial piston variable displacement pumps) designed for open hydraulic systems. To ensure the long-lasting and stable operation of the entire hydraulic pump, the following are the most critical Hydraulic Pump Spare Parts lists.

1. Core Rotating & Distribution Parts

As the heart of the Hydraulic piston pump, these spare parts directly determine the volumetric efficiency of the hydraulic system:

· Cylinder Block & Piston/Slipper Assembly: This is the core component of the hydraulic pump that generates high-pressure oil, including pistons, slipper pads, retaining plate, and spherical bushing.

· Valve Plate: Key to separating high and low pressure; wear will directly cause a pressure drop throughout the entire hydraulic system.

2. Control & Regulation

This is the core mechanism that enables the hydraulic pump to achieve power matching and energy saving, commonly including LRDS (load sensing/constant power/pressure cut-off) controllers:

· Control Valve Block: Wear on the internal spools and springs will affect the response speed of the Hydraulic piston pump to load, causing sluggish action in the entire hydraulic system.

· Servo Piston & Swash Plate Bearings: Responsible for adjusting the displacement variation of this Hydraulic piston pump.

3. Seal Kits & Hardware

Essential Hydraulic Pump Spare Parts to maintain the cleanliness of the hydraulic system and prevent external leakage:

· Shaft Seal: A critical seal that prevents the hydraulic pump from leaking oil into the engine flywheel housing.

· Housing O-rings/Gasket Kit: Ensures stable return pressure inside the Hydraulic piston pump housing and prevents external air from entering the hydraulic system.

4. Drive & Support

· Drive Shaft: Transmits torque; spline wear can cause abnormal noise.

· Large Bearings: Support the cylinder block rotation; loose rollers can severely damage the entire hydraulic pump.

Applicable Equipment & Selection Tips

· A11VO190: This Hydraulic piston pump is widely installed in the hydraulic system of medium-sized excavators and road milling machines.

· A11VO260: This large displacement specification is suitable for the hydraulic pump assembly of large rotary drilling rigs and mining breaker hammers.

· Selection Reminder: When ordering Hydraulic Pump Spare Parts, always provide the complete material number from the hydraulic pump nameplate to lock in the exact seal material and rotation direction. When replacing parts, simultaneously cleaning the hydraulic system lines and replacing the filter can significantly extend the service life of the Hydraulic piston pump.

Rexroth Main Pump Spare Parts (A11VO190 & A11VO260) – Designed for Construction and Road Machinery

1. Product Overview

TheA11VO190 and A11VO260are Rexroth’saxial piston variable-displacement hydraulic piston pumpswith a swashplate design, specifically engineered for open-circuithydraulic systemsin construction and road machinery. Their key features include:

• Energy Efficiency: Variable displacement control adjusts flow based on load demand, reducing energy waste.

• High Reliability: Built with premium materials and advanced manufacturing for harsh operating conditions.

• Versatile Control Options: Supports constant pressure (DR), load-sensing (LS), electro-proportional (EP), and other control modes for diverse applications.

• Through-Drive Capability: Enables stacking of additional pumps (e.g., gear pumps or identical axial piston pumps) for multi-pump configurations.

2. Technical Specifications

【表格】

Parameter A11VO190 A11VO260

Displacement 190 cm³/rev 260 cm³/rev

Rated Pressure 350 bar (35 MPa) 350 bar (35 MPa)

Peak Pressure 400 bar (40 MPa) 400 bar (40 MPa)

Speed Range 1,800–2,200 rpm 1,800–2,300 rpm

Flow Range 342–418 L/min 468–598 L/min

Control Modes DR/LS/EP, etc. DR/LS/EP, etc.

3. Applications

A11VO190 and A11VO260 hydraulic pumpsare widely used in:

• Construction Machinery:

• Excavators, rotary drilling rigs, crawler cranes.

• Concrete pump trucks, mixers, pavers.

• Road rollers, milling machines, loaders.

• Road Machinery:

• Asphalt mixing plants, asphalt pavers.

• Cold recyclers, slipform pavers.

4. Key Advantages

1. Energy Efficiency:

• Variable displacement reduces energy consumption by matching flow to load demands.

• Ideal for simultaneous operations (e.g., digging and swinging) with minimal heat generation.

2. High Reliability:

• Swashplate-type axial piston design withstands high pressure and shock loads.

• Premium bearings and seals extend service life and minimize leakage risks.

3. Flexible Control:

• Supports multiple control modes (e.g., DR for constant pressure, LS for load sensing) to suit varying work conditions.

• Electro-proportional (EP) control enables remote precision adjustment for enhanced operator comfort.

4. Easy Maintenance:

• Modular design simplifies spare part replacement and reduces downtime.

• Through-drive capability streamlines system layout for easier servicing.

**5. CriticalHydraulic Pump Spare Parts

To ensure long-term reliability ofA11VO190 and A11VO260 hydraulic pumps, regularly inspect and replace these key components:

1. Piston Components (Piston Shoe, Ring Piston):

• Wear increases internal leakage and reduces efficiency.

• Replace every 2,000–3,000 operating hours.

2. Cylinder Block:

• Surface scratches or wear cause flow fluctuations.

• Inspect regularly and replace as needed.

3. Valve Plate:

• Sealing surface wear leads to high-pressure oil leakage.

• Replace in tandem with the cylinder block.

4. Bearings:

• Includes main bearings and swashplate bearings for high-load support.

• Monitor vibration/noise and replace promptly.

5. Seal Kit:

• Includes shaft seals and oil seals to prevent external contamination.

• Replace during every maintenance cycle.

6. Control Valves:

• Such as DR constant pressure valves or LS load-sensing valves for precise control.

• Calibrate or replace as required.

6. Maintenance Recommendations

1. Hydraulic Fluid Management:

• Change hydraulic oil every 2,000–3,000 hours or per equipment manual.

• Use Rexroth-approved fluids (e.g., ISO VG 46).

2. Filter Replacement:

• Regularly replace suction and return filters to prevent contaminants from entering the pump.

3. System Flushing:

• Flush the entire hydraulic system after oil changes or repairs to ensure cleanliness.

4. Performance Monitoring:

• Routinely check pump outlet pressure, flow, and temperature for anomalies.

7. Case Studies

• Sany Heavy Industry Concrete Pump Truck:

• Equipped withA11VO190 hydraulic pumps, LS control ensures precise boom coordination for improved efficiency.

• XCMG Rotary Drilling Rig:

• FeaturesA11VO260 hydraulic pumpsfor high-torque drilling in complex geological conditions.

8. Conclusion

Rexroth A11VO190 and A11VO260 hydraulic pumpsdeliver high efficiency, reliability, and flexible control, making them the ideal power source for hydraulic systems in construction and road machinery. Regular maintenance and timely replacement of criticalhydraulic pump spare partssignificantly extend pump lifespan, reduce total lifecycle costs, and enhance operational productivity for users.