A4VTG90EP2 Hydraulic Piston Pump for Concrete Mixer Truck 90cc Variable Displacement Pump

Product Overview:
The A4VTG90EP2 is a high-performance swashplate design axial piston pump from the renowned Rexroth A4VTG series. Specifically engineered for closed circuit hydrostatic transmissions, this variable pump delivers exceptional power density, reliable operation, and precise electronic control under extreme loads . With a displacement of 90 cm³/rev and advanced EP2 electro-proportional control, it provides stepless, infinitely variable flow adjustment for demanding mobile and industrial applications . This unit is a direct, high-quality replacement solution for original Rexroth equipment.

Technical Specifications:

• Model: A4VTG90EP2

• Type: Swashplate design, variable axial piston pump (closed circuit)

• Displacement: 90 cm³/rev (steplessly variable)

• Nominal Pressure: 400 bar (continuous operation)

• Maximum Pressure: 450 bar (peak)

• Maximum Speed: Up to 3400 rpm

• Flow Rate: Up to 306 L/min (at max speed)

• Control Type: EP2 - Electro-proportional control (2-wire, proportional solenoid)

• Design: For closed circuit hydrostatic transmissions

• Mounting Flange: SAE / ISO 3019-1 standard

• Port Connection: SAE flange ports

• Weight: Approximately 50 kg

• Material: Robust cast iron construction

• Temperature Range: -20°C to +90°C

Core Features:

• Robust Swashplate Design: The proven swashplate design with cast iron construction ensures reliable operation, excellent efficiency, and long service life in closed circuit applications .

• EP2 Electro-Proportional Control: Advanced electronic control provides stepless, infinitely variable displacement adjustment proportional to the input current. Features fast response times and precise repeatability for accurate machine control. Compatible with various controller outputs (0-20mA, 4-20mA, 0-10V, PWM) .

• Closed Circuit Design: Specifically engineered for hydrostatic transmissions, with integrated charge pump and relief valves for complete system integration .

• Stepless Variable Displacement: Output flow is infinitely variable between zero and maximum, offering precise flow matching to reduce energy consumption and heat generation .

• High-Pressure Capability: Delivers 400 bar nominal and 450 bar peak pressure, meeting the most demanding mobile application requirements .

• Compact Power Density: Delivers 250 kW of power at max flow, providing exceptional power-to-weight ratio .

• Integrated Charge Pump: Built-in charge pump with pressure-relief valve ensures reliable operation and system cooling .

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

• Multiple Control Options: Various control types available including hydraulic (HD), electro-proportional (EP), and displacement-dependent power control (DA) .

Main Applications (Suitable Equipment):
The A4VTG90EP2 is widely recognized as the specialized pump for machinery requiring precise electronic control of hydrostatic drives. It is extensively used in:

1. Paver & Road Construction Machinery (Primary Application):

• Main travel pump for asphalt pavers - provides smooth, variable speed control for crawler drives

• Road pavers and asphalt finishers

• Milling machines and road planers

• Vögele, Dynapac, and Bomag paver applications

2. Excavators & Construction Machinery:

• Travel drives for crawler excavators (20-25 ton class)

• Swing drives for medium excavators

• Material handlers and tracked loaders

• Compact crawler cranes

3. Drilling & Foundation Equipment:

• Rotary drilling rigs (旋挖钻机) - travel and swing drives

• Piling rigs and foundation machinery

• Tunnel boring machines (TBM) - auxiliary drives

4. Agricultural Machinery:

• Self-propelled sprayers - hydrostatic travel drives

• Combine harvesters - traction drives

• Forage harvesters - variable speed drives

5. Material Handling Equipment:

• Telehandlers with hydrostatic traction drives

• Rough-terrain forklifts

• Aerial work platforms - self-propelled models

6. Mining Machinery:

• Underground mining equipment - traction drives

• Continuous miners and development drills

7. Specialty Applications:

• Industrial hydrostatic drives requiring precise electronic control

• Mobile cranes - travel drives

• Snow groomers and winter maintenance equipment