40 cm³/rev displacement closed-circuit swashplate-type axial piston variable pump A4VG40

1. Product Description

The A4VG40 is a variable axial piston pump with a swashplate design, intended for use in closed-circuit hydrostatic drive systems. With a displacement of 40 cm³/rev (belonging primarily to the 32 series), it is widely used in mobile machinery.

2. Key Advantages

• Bidirectional stepless variability. The swash plate can swing across the neutral position, allowing for smooth changes in the direction of hydraulic fluid flow—without the need for a directional control valve—thereby enabling stepless speed regulation in both forward and reverse directions.
• Highly integrated design. The pump housing incorporates a charge pump, a charge relief valve, two high-pressure relief valves (with integrated charge/replenishment functionality), and an adjustable pressure cut-off valve (standard equipment). This effectively prevents system overload and simplifies external piping.
• Through-drive capability. An optional through-drive configuration is available, facilitating the tandem mounting of an additional pump of the same size or an auxiliary gear pump at the rear.
• Diverse control options. Available control methods include, but are not limited to, electric proportional control (EP), two-position electric control (EZ), hydraulic pilot control (HD), mechanical servo control (HW), and speed-dependent automatic control (DA).

3.Technical Specifications

4. Typical Application Areas

This model is primarily designed for closed-loop hydrostatic travel or swing drive systems in small-to-medium-sized construction machinery and specialized mobile equipment:
• Construction Machinery: Skid-steer loaders, compact wheel loaders, telehandlers, and road rollers.
• Specialized and Mining Vehicles: Concrete mixer trucks, compact excavators, and auxiliary transport vehicles for mining operations.