Danfoss tractor variable piston pump
Danfoss Variable Displacement Piston Pumps for Tractors
Danfoss variable displacement piston pumps are specifically engineered to meet the rigorous demands of tractor applications, delivering exceptional reliability, efficiency, and precise control in harsh agricultural environments. Designed for both open-circuit and closed-circuit hydraulic systems, these pumps provide tailored power solutions that optimize tractor performance, reduce fuel consumption, and enhance operational productivity.
Key Product Series for Tractors
1. Series 1 High-Pressure Closed-Circuit Piston Pumps
The Series 1 closed-circuit variable piston pumps are proven workhorses for farm tractors, offering decades of reliable performance in demanding agricultural operations. With a displacement range of 55 – 105 cc, these heavy-duty hydrostatic pumps feature a continuous pressure rating of up to 430 bar (6,236 psi), making them ideal for powering critical tractor functions such as hydraulic-driven implements and traction systems. Their robust design ensures consistent performance even in dusty, vibration-prone field conditions.
2. D1P Open-Circuit High-Power Axial Piston Pumps
Tailored for high-power tractor applications requiring variable displacement open-circuit flow, the D1P pump family delivers exceptional performance with displacement options up to 260 cc (15.87 in³), maximum working pressures of 350 bar (5,076 psi), and input speeds up to 2,500 rpm. Equipped with flexible control options including pressure compensated control and remote pressure compensated control, these pumps efficiently adapt to varying tractor load demands. The D1P series features a robust construction with black paint finish and is globally available to meet international tractor manufacturing standards .
3. Series 45 Open-Circuit Axial Piston Pumps
The Series 45 pumps are a high-performance and flexible choice for medium-pressure tractor hydraulic systems, with displacements ranging from 25 cc to 147 cc (1.53 in³ to 8.97 in³), speeds up to 3,600 rpm, and pressures up to 310 bar (4,495 psi). Their modular design reduces time-to-market for tractor manufacturers and offers seamless integration with Danfoss PVG proportional valves, ensuring precise and efficient machine movement across a wide range of flow requirements. The series supports various control options, including electronic displacement control (EDC) and electronic torque limiting (ETL), which optimize power management and protect tractor engines from stalling .
4. H1P Closed-Circuit Axial Piston Pumps
As part of Danfoss’ pioneering H1 family, the H1P closed-circuit variable displacement axial piston pumps bring best-in-class efficiency and power density to high-performance tractors. With a displacement range of 45 – 280 cm³ per revolution and the capability to operate at a delta pressure of 480 bar, these pumps deliver superior power output while maintaining compact dimensions. The integrated electro-hydraulic servo system ensures precise control of hydraulic flow rate and direction, minimizing servo pressure losses. Its lightweight, compact design with a single swashplate and no T-bar simplifies installation in tractor hydraulic systems, while the integral gerotor charge pump reduces volumetric losses to a minimum .
Core Features & Advantages for Tractor Applications
- Proven Reliability: Engineered to withstand harsh agricultural environments, including dust, temperature fluctuations, and heavy vibrations, ensuring long service life in tractor operations.
- High Power Density: Compact and lightweight designs deliver maximum power output without compromising tractor space constraints, optimizing overall machine layout.
- Precise Control Capabilities: A wide range of control options, such as electronic proportional control, load sensing control, and torque limiting control, enable precise adjustment to tractor load demands, enhancing operational efficiency and reducing operator fatigue.
- Energy Efficiency: Variable displacement technology adjusts flow and pressure according to actual operational needs, minimizing fuel consumption and reducing total ownership costs for tractor users.
- Modular & Flexible Design: Modular construction and diverse mounting options facilitate easy integration with different tractor models, while compatibility with Danfoss Plus+1® compliant controls enables plug-and-play functionality for streamlined system design .
Key Technical Specifications (Typical Values)
| Product Series | Displacement Range | Maximum Working Pressure | Maximum Input Speed | Control Options |
|---|---|---|---|---|
| Series 1 | 55 – 105 cc | 430 bar (continuous) | N/A | Electronic proportional control, manual displacement control, hydraulic remote control |
| D1P | Up to 260 cc/rev | 350 bar | 2,500 rpm | Pressure compensated control, remote pressure compensated control |
| Series 45 | 25 – 147 cc | 310 bar | 3,600 rpm | EDC, ETL, fan drive control, load sensing control |
| H1P | 45 – 280 cm³/rev | 480 bar (delta pressure) | N/A | AC, EDC, FDC, FNR, MDC, NFPE |
Application in Tractors
Danfoss variable displacement piston pumps are widely integrated into tractor hydraulic systems, powering a range of critical operations including: hydraulic lifting of implements (plows, harrows, seeders), power steering systems for enhanced maneuverability, hydraulic motor-driven attachments, and cooling fan systems. Their ability to adapt to varying load conditions ensures consistent performance during intensive farming tasks such as plowing, sowing, harvesting, and material handling, making them an essential component for modern high-efficiency tractors.
Backed by Danfoss’ global service network and decades of experience in mobile hydraulics, these pumps offer reliable support for tractor manufacturers and end-users, ensuring maximum uptime and operational efficiency in agricultural applications.
