Product Introduction
The Rexroth A4VSO180EO1/30L-PPB13N00 is a genuine German-manufactured open-circuit axial piston variable pump from the A4VSO series, featuring EO1 electro-proportional displacement control. With a displacement of 180 cm³/r and PPB13 SAE compact porting, this pump is designed for applications where flow must be set remotely via an electrical control signal—either from a PLC, CAN bus interface, or dedicated proportional amplifier.
While primarily an industrial pump, the A4VSO180EO1 is also found in loader/excavator auxiliary hydraulic circuits, such as fan drive systems, cooling pumps, or supplementary tool hydraulics on heavy mobile equipment. Its compact PPB13 porting makes it easier to integrate into space-constrained machine frames.
Rated for 350 bar continuous / 400 bar peak, the pump delivers reliable high-pressure performance in demanding working conditions.
EO1 Electro-Proportional Control - Explained
The EO1 function provides direct electrical command of pump displacement:
- Flow output is linearly proportional to an external analog signal (±10 V DC or 4-20 mA typical)
- No hydraulic pilot pressure required for flow setting—simplifies circuit architecture
- Enables remote, programmable flow changes via operator cab controls, PLC, or machine controller
- Suitable for integrating into CAN-based or analog-controlled mobile hydraulic systems
- Can be paired with external pressure limiting valve for system overload protection
On loader/excavator applications, EO1 is often used for proportional fan drive, auxiliary tool flow control, or charge pump circuits—not as the main travel pump (which would be a closed-circuit A4VG).
Frequently Asked Questions
Q1: Can the A4VSO180EO1 be used as the main travel pump on a loader or excavator?
A1: Not typically. The A4VSO series is an open-circuit pump. Most modern loaders and excavators use closed-circuit pumps (A4VG or A4VM series) for track/wheel drive. The A4VSO180EO1 is better suited for auxiliary circuits such as cooling fans, implement pumps, or supplementary hydraulic functions on these machines.
Q2: What is the difference between EO1 and EO2 electro-proportional control?
A2: Both provide electrical flow command, but they differ in solenoid type, stroke limiter design, and amplifier compatibility. Consult your Rexroth datasheet or distributor to confirm which version matches your existing amplifier/controller setup.
Q3: What electronics are needed to run the EO1 pump?
A3: A proportional amplifier (e.g. Rexroth VT-Series) or a PLC/machine controller analog output module is required to send the command signal to the EO1 solenoid. Some versions include onboard electronics—verify with your supplier.
Q4: Is PPB13 porting suitable for high-flow applications?
A4: PPB13 is the compact SAE port size compared to PPB25. At 180 cm³/r and up to 324 L/min, ensure your hose/manifold sizing accommodates the flow velocity limits for PPB13. For very high flow, PPB25 may be preferred.
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