Triple Hydraulic Pump A11VO75 + A11VO40 + AZPFF-12 Rexroth Piston Gear Pump for Concrete Pump

Product Overview:
The A11VO75 + A11VO40 + AZPFF-12 is a high-performance triple tandem (dual main pump + gear pump) hydraulic power unit combining two renowned Rexroth A11VO series axial piston pumps with an AZPFF series gear pump. Specifically engineered for open circuit hydraulic systems, this triple-pump configuration delivers exceptional power density, reliable operation, and precise control for complex machinery requiring multiple independent hydraulic circuits . With combined displacements of 75 cm³/rev + 42 cm³/rev (A11VO75 + A11VO40) plus the AZPFF-12 gear pump for auxiliary functions, this complete hydraulic power unit is widely used in demanding mining, construction, and tunneling applications . This unit is a direct, high-quality replacement solution for original Rexroth equipment.

Technical Specifications:

• Model Combination: A11VO75 + A11VO40 + AZPFF-12 (triple tandem configuration)

• Type (Main Pumps): Swashplate design, variable axial piston pumps

• Type (Auxiliary Pump): AZPFF series gear pump (fixed displacement)

• Displacement (A11VO75): 75 cm³/rev (steplessly variable from Vg max to Vg min = 0) 

• Displacement (A11VO40): 42 cm³/rev (steplessly variable from Vg max to Vg min = 0) 

• Displacement (AZPFF-12): 12 cm³/rev (fixed, typical for gear pump auxiliary functions)

• Nominal Pressure: 350 bar (A11VO main pumps) 

• Maximum Pressure: 400 bar (A11VO main pumps, peak) 

• Control Options (A11VO75/A11VO40): LR (power control), DR (pressure control), HD (hydraulic pilot control), EP (electro-proportional), and more 

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

• Through-Drive: 100% through drive suitable for adding additional pumps up to same nominal size 

• Mounting Flange: SAE / ISO 3019-1 standard

• Total Weight: Approximately 120-130 kg (estimated based on component weights)

• Material: Robust cast iron construction (main pumps) 

• Temperature Range: -20°C to +90°C

Core Features:

• Triple / Tandem Pump Configuration: Two high-performance A11VO series axial piston pumps plus an AZPFF gear pump in a compact, space-saving tandem arrangement, providing independent hydraulic power for multiple machine functions from a single drive source .

• A11VO75 - Primary High-Pressure Pump: Large displacement (75 cc/rev) axial piston pump with 350 bar nominal pressure capability, delivering massive hydraulic power for primary machine functions like cutting heads or main drives .

• A11VO40 - Secondary High-Pressure Pump: Medium displacement (42 cc/rev) axial piston pump providing independent hydraulic power for secondary functions such as tracks, conveyors, or auxiliary systems .

• AZPFF-12 - Auxiliary Gear Pump: Fixed displacement gear pump (12 cc/rev) dedicated to pilot pressure circuits, cooling, filtration, or low-pressure auxiliary functions, ensuring reliable operation of control systems .

• Robust Swashplate Design: The proven swashplate design ensures reliable operation, excellent efficiency, and long service life in open circuit applications .

• Designed for Mobile Applications: Primarily engineered for use in demanding mobile applications, with rugged construction to withstand harsh operating conditions .

• Multiple Advanced Control Options: Comprehensive range of controls available matching any application requirement, including power, pressure, hydraulic pilot, and electro-proportional options .

• Stepless Variable Displacement: 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 .

• Flexible Installation Options: Pumps operate under self-priming conditions, with tank pressurization, or with optional built-in charge pump (impeller) for enhanced suction performance .

• Durability: Robust bearing system and high-quality cast iron materials ensure long service life in demanding continuous operation .

Main Applications (Suitable Equipment):
The A11VO75 + A11VO40 + AZPFF-12 triple tandem pump combination is widely recognized as the specialized power unit for complex heavy machinery requiring multiple independent hydraulic circuits. It is extensively used in:

1. Tunneling & Mining Machinery (Primary Application):

• Roadheaders and boom-type tunneling machines - main hydraulic power unit for cutting head, tracks, and conveyors 

• Tunnel boring machines (TBM) and rock drilling rigs

• Mining machinery and coal mining equipment - complete hydraulic system

• Continuous miners and development drills

2. Excavators & Construction Machinery:

• Main hydraulic pump for medium excavators (15-25 ton class) - separate circuits for boom, arm, bucket, and swing

• Long-reach excavators and material handlers

• Crawler excavators requiring independent high-pressure circuits 

3. Concrete Machinery:

• Concrete pump trucks - main pumping circuit, boom positioning, and auxiliary functions 

• Concrete mixing plant hydraulics - multiple independent circuits

• SANY, Zoomlion, and Putzmeister concrete pump applications 

4. Heavy Construction Equipment:

• Crawler cranes and heavy lifting equipment

• Piling rigs and foundation equipment

• Road headers and pavement machinery

5. Material Handling Equipment:

• Heavy-duty telehandlers and material handlers

• Large forklifts and container handlers

• Mobile cranes with multiple hydraulic functions

6. Specialty Applications:

• Hydraulic power units for complex industrial machinery

• Heavy-duty hydraulic systems requiring separate high-pressure circuits plus auxiliary functions

• Marine and offshore hydraulics with multiple independent systems