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A4VG250DP2D1 A11VO130DRS
Rexroth
Product Overview
This A4VG250DP2D1 + A11VO130DRS is a professional-grade, dual-circuit hydraulic pump assembly engineered for high-performance heavy machinery. It combines a closed-circuit hydrostatic drive pump with an open-circuit load-sensing work pump into a single, compact unit via a through-drive shaft. This integrated design provides independent, intelligent, and efficient hydraulic power for both the machine's propulsion and its working tools from one prime mover, representing a complete hydraulic system core for advanced mobile equipment.
Key Technical Specifications & Functional Breakdown
| Component | Model | Primary Function | Key Specification / Control Feature |
|---|---|---|---|
| Drive Pump | A4VG250DP2D1 | Closed-Circuit Hydrostatic Drive | Displacement: ~250 cm³/rev Function: Powers travel/wheel/track drives. Control: Electro-hydraulic proportional control for smooth speed & direction. |
| Work Pump | A11VO130DRS | Open-Circuit Implement Power | Displacement: 130 cm³/rev Function: Powers implements (boom, arm, bucket, attachments). Control: Load Sensing (DRS) for on-demand, energy-efficient flow. |
| Shared Feature | Tandem Assembly | Through-Drive Shaft for compact, direct coupling of both pumps. |
Key Features & Advantages
Complete System-in-One Solution: Eliminates the need for separate pump mounts and complex alignments, offering a space-saving and simplified “drop-in” power unit for machine manufacturers.
Optimized Power for Each Function: The A4VG pump delivers precise, responsive control for propulsion, while the A11VO pump with Load Sensing (DRS) ensures the implement hydraulic system operates with maximum energy efficiency, reducing fuel consumption.
Superior Reliability & Integration: The tandem design reduces potential external leak points and plumbing compared to two separate pumps, enhancing overall system reliability and simplifying installation.
Heavy-Duty Construction: Both pumps are built to withstand the continuous high pressures, shock loads, and harsh environments of demanding sectors like mining, construction, and forestry.
Typical Applications
This tandem pump assembly is the ideal hydraulic power source for complex machinery requiring simultaneous and independent control of travel and multiple work functions:
Large Hydraulic Excavators (e.g., 30-ton class and above): The A4VG pump drives the tracks, while the A11VO DRS pump efficiently powers the boom, arm, bucket, and auxiliary attachments.
Heavy-Duty Wheel Loaders: Provides independent power for the transmission/drive axle and the lifting/tilting implement circuits.
Advanced Forestry Machines: Powers the vehicle's drive system and the intelligent, high-productivity crane and processing head.