Rexroth A11VLO260 + A10VO28 tandem swashplate design axial piston pump Mining Machinery Pump

Product Overview:
The A11VLO260 + A10VO28 is a high-performance tandem (dual) swashplate design axial piston pump combination from the renowned Rexroth A11VLO and A10VO series. Specifically engineered for open circuit hydraulic systems, this dual-pump configuration delivers exceptional power density, reliable operation, and precise control for complex machinery requiring independent hydraulic circuits . With a primary pump displacement of 260 cm³/rev and a secondary pump displacement of 28 cm³/rev (constant pressure pump), this combination is widely recognized as the standard hydraulic power unit for concrete pump trucks and heavy construction equipment . This unit is a direct, high-quality replacement solution for original Rexroth equipment.

Technical Specifications:

• Model Combination: A11VLO260 + A10VO28 (tandem configuration)

• Type: Swashplate design, variable axial piston pumps (dual / tandem)

• Displacement (Primary - A11VLO260): 260 cm³/rev (steplessly variable from Vg max to Vg min = 0) 

• Displacement (Secondary - A10VO28): 28 cm³/rev (constant pressure control) 

• Nominal Pressure: 350 bar (A11VLO260) / 280 bar (A10VO28) 

• Maximum Pressure: 400 bar (A11VLO260) / 315 bar (A10VO28) 

• Control Options (A11VLO260): LRDS (power control + pressure cutoff + load sensing), LRDU, DRS, EP, and more 

• Control Options (A10VO28): DR (constant pressure control) 

• Design: For open circuit hydraulic systems with through-drive configuration 

• Mounting Flange: SAE / ISO 3019-1 standard

• Total Weight: Approximately 170 kg (95kg + 15kg + mounting hardware)

• Material: Robust cast iron construction 

• Temperature Range: -20°C to +90°C 

Core Features:

• Tandem / Dual Pump Configuration: Two high-performance pumps in a compact, space-saving tandem arrangement, providing independent hydraulic power for multiple machine functions from a single drive source .

• A11VLO260 - Main High-Pressure Pump: Large displacement (260 cc/rev) axial piston pump with 350 bar nominal pressure capability, delivering massive hydraulic power for primary machine functions . Features high-speed capability, especially in impeller pump version .

• A10VO28 - Constant Pressure Pilot Pump: Secondary pump with DR constant pressure control maintains stable pressure for pilot and control functions, ensuring precise operation of the main pump and system valves .

• Integrated System Design: This specific combination is engineered as a matched system, with the A10VO28 providing control oil (G-port) for the A11VLO260's LRDU control, enabling fast swashplate response and reduced pulsation .

• Stepless Variable Displacement (A11VLO260): Output flow is proportional to drive speed and infinitely variable between Vg max and Vg min = 0, offering precise flow matching to reduce energy consumption and heat generation .

• Multiple Advanced Control Options: Comprehensive range of controls available for the A11VLO260 including power, pressure, hydraulic pilot, and electro-proportional options .

• Through-Drive Capability: 100% through drive suitable for adding additional gear pumps or piston pumps, enabling flexible multi-circuit system configurations .

• Durability: Robust bearing system and high-quality cast iron materials ensure long service life in demanding continuous operation. Features specially designed long-life high-precision full roller bearings .

• High Power Density: Delivers exceptional power in a relatively compact package, with excellent power-to-weight ratio .

• Proven Concrete Pump Application: Specifically designed and widely used as the main hydraulic system for concrete pump trucks, with proven field performance .

Main Applications (Suitable Equipment):
The A11VLO260 + A10VO28 tandem pump combination is widely recognized as the specialized power unit for heavy machinery requiring high-pressure, variable flow hydraulics with separate control circuits. It is extensively used in:

1. Concrete Pump Trucks (Primary Application):

• Main hydraulic pump for large concrete pump trucks (37m-56m boom pump trucks) 

• SANY, Zoomlion, Putzmeister, and Schwing concrete pump trucks - main pump configuration 

• Truck-mounted concrete pumps and stationary concrete pumps

• Concrete placing booms and line pumps

   (truck-mounted concrete pumps) - A11VLO260+A10VO28 is the standard configuration 

2. Tunneling & Mining Machinery:

• Tunnel boring machines (TBM) and roadheaders

• Mining machinery and coal mining equipment - main hydraulic pump

• Rock drilling rigs and foundation equipment

3. Heavy Construction Machinery:

• Large excavators (40-60 ton class) - main pump

• Crawler cranes and heavy lifting equipment

• Material handlers and heavy-duty mobile equipment 

4. Industrial Applications:

• Hydraulic power units for heavy industry

• Large presses and forging equipment

• Metallurgical equipment and steel mill machinery 

5. Specialty Applications:

• Rotary drilling rigs

• Shield tunneling machines

• Heavy-duty marine hydraulic systems