Bosch Rexroth A4VTG axial piston pump for CIFA Engineering Equipment 240695 241704 243108 242974 K1008441 K1019061 K2001569 K2007591

Why CIFA Engineering Trusts Bosch Rexroth

CIFA (Compagnia Italiana Forme Acciaio) has spent decades building a reputation for engineering excellence in concrete machinery. Whether dealing with a standard truck mixer or a complex pump mounted on a heavy-duty chassis, the hydraulic system must handle immense, continuous loads.

The Closed-Circuit Advantage

The A4VTG operates in a closed circuit, meaning fluid flows directly from the pump to the hydraulic motor (and vice versa) without constantly returning to a large reservoir. This setup provides:

Dynamic Control: Instantaneous reversing of the concrete mixer drum.

Compact Footprint: Reduced oil volume requirements, saving critical chassis space on CIFA vehicles.

Higher Efficiency: Lower energy losses compared to open-loop alternatives.

Swashplate Design and Variable Displacement

Utilizing a high-performance swashplate design, the A4VTG alters its displacement infinitely by adjusting the angle of the swashplate. This allows CIFA operators to precisely regulate drum rotation speeds regardless of engine RPM, optimizing fuel consumption and concrete consistency during transit.

Key Technical Features of the A4VTG Series

To appreciate why this specific axial piston pump is favored by CIFA engineers, we look at the core mechanics and integrated components that set it apart.

1. Integrated Boost Pump (Auxiliary Impeller)

Operating a closed circuit requires a constant supply of fresh, filtered oil to compensate for internal leakage and to maintain control pressure. The A4VTG features an integrated boost pump that serves a dual purpose:

It supplies the boost and control oil.

It acts as a cooling circuit feed to prevent thermal degradation of the hydraulic fluid.

2. High-Pressure Relief Valves

Concrete is heavy, viscous, and unpredictable. If a mixing drum jams, the hydraulic system faces a massive pressure spike. The A4VTG integrates high-pressure relief valves with an integrated boost function, protecting both the pump and the CIFA equipment's mechanical gearboxes from catastrophic overload.

3. Proportional Control Options

Depending on the CIFA model—whether it's a standard HD series mixer or an advanced ENERGYA hybrid mixer—the A4VTG can be equipped with various control devices:

HW (Hydraulic Servo Control): Mechanical-hydraulic control proportional to the input lever position.

EP (Electric Proportional Control): Allows for seamless integration with CIFA's electronic control units (ECUs) for automated mixing cycles.

For more brand and equipment models, please visit https://www.baolilaihydraulic.com/brand/

Q1: What are the most common displacement sizes of the A4VTG used by CIFA?

A1: CIFA primarily utilizes the A4VTG071 and A4VTG090 models (71cc and 90cc per revolution, respectively). These sizes provide the optimal balance of torque and flow rate required for standard 8 to 12-cubic-meter mixing drums.

Q2: What causes a noisy A4VTG pump on a concrete mixer?

A2: Increased noise or "whining" is typically caused by cavitation (air entering the fluid line or a blocked suction filter) or internal wear on the valve plate and piston shoes. If cleaning the filtration system does not resolve the noise, the pump should be bench-tested and inspected immediately.

Q3:What is the price and delivery time of the A4VTG hydraulic pump for the CIFA Engineering Equipment?

A3: The specific price and delivery time will depend on the equipment model or specific product model you provide.

Q4:How to purchase an A4VTG hydraulic pump for a CIFA Engineering Equipment?

A4:You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.