RE241578 RE241577 Gear Pump for Tractor 1054 1204 1354 1404 6603 Hydraulic Parts

1. Technical parameters
RE241578 is the original hydraulic gear pump for the 6B series tractors, with parameters suitable for medium and low pressure operation requirements of medium-sized tractors.
Pressure specification: Rated working pressure 16MPa, maximum pressure resistance 20MPa (short-term overload), suitable for the hydraulic systems of tractor suspension, steering, etc.
Flow rate and displacement: The displacement is approximately 45mL/rev. At the rated speed of 2200r/min, the theoretical flow rate is about 99L/min. The actual output flow rate fluctuates between 90 and 95L/min due to working conditions.
Efficiency performance: Volumetric efficiency ≥90%, total efficiency ≥82%, with low energy loss during continuous operation, meeting the energy-saving requirements of tractors.
Medium and environment: Compatible with John Deere special anti-wear hydraulic oil (ISO VG 46), with a working temperature range of -10 ℃ to 70℃, it can adapt to low-temperature start-up and high-temperature operation in the field.
Drive and installation: Straight key shaft connection, rated input power approximately 30kW, flange installation dimensions comply with John Deere 6B series standard interfaces, original factory replacement without modification.2. Working Principle
This pump is an external gear pump. It achieves oil suction and discharge through the volume change of gear meshing. The specific process is as follows:
Oil suction process: The engine drives the driving gear to rotate, which in turn drives the driven gear to rotate in the opposite direction. The tooth valleys at the meshing point of the two gears gradually separate in the oil suction chamber, creating a vacuum. Hydraulic oil is then sucked into the tooth valleys from the oil tank through the oil inlet.
Oil discharge process: The gears keep rotating, and the oil in the tooth valleys is carried to the oil discharge chamber along with the rotation of the gears. The tooth valleys at the meshing point gradually close, and the oil is squeezed out from the oil outlet and enters the hydraulic system.
Pressure stability: Integrated relief valve. When the system pressure exceeds the rated value, part of the oil will flow back to the oil tank through the relief valve to prevent overload damage to the pipeline or actuator.

3. Product features and advantages
Core features
High-strength gear design: The gears are made of 20CrMnTi alloy steel and undergo carburizing and quenching treatment (surface hardness HRC 58-62), with tooth surface accuracy reaching grade 6, reducing meshing wear.
Integrated pump body structure: Cast iron pump body (tensile strength ≥300MPa) and end cover are cast as a whole, reducing leakage points and adapting to the bumpy working environment of tractors.
Double seal protection: The input shaft adopts a combined seal of skeleton oil seal and O-ring to prevent oil leakage and external dust intrusion, thereby extending the service life.
Wide speed adaptability: It maintains a stable flow output within the speed range of 800 to 2400r/min, making it suitable for the fluctuating speed conditions of tractor engines.
Outstanding advantages
Strong reliability: After 1,500 hours of field operation tests, there were no faults, and the average service life reached 6,000 to 8,000 hours, which is 30% longer than that of similar domestic pumps.
Easy maintenance: The structure is simple. Gears, bearings and other vulnerable parts can be replaced separately. The single maintenance time is about 2 hours and no professional tools are required.
Precise adaptability: Tailor-made for the John Deere 6B series, the flow rate is perfectly matched with the requirements of the suspension system and hydraulic output interface, avoiding system redundancy.
High cost-effectiveness: The price is lower than that of imported plunger pumps, and the spare parts are highly versatile. The long-term usage cost is 20% lower than that of similar imported products.

4. Usage functions and purposes
Core function: As the power source of the tractor’s hydraulic system, it provides pressure oil for the suspension device (lifting farm tools), hydraulic output interface (driving harvesters, seeders and other agricultural machinery), and power steering system.
Main uses: Driving the lifting of agricultural tools, the rotation of hydraulic motors (such as the auger of a harvester), and the movement of steering cylinders, achieving the coordinated operation of tractors and agricultural machinery, and enhancing agricultural production efficiency.

5. Applicable machines and scenarios
Applicable machines: John Deere 6B series tractors (models such as 904, 1204, 1304, 1054, 1354, etc.) are the original factory standard hydraulic pumps for these models.
Applicable scenarios
Field operations: Drive plows, harrows and other land preparation tools up and down, and adjust the depth of seeders and furrow openers.
Harvesting scene: Provide hydraulic power for the conveying device of combine harvesters and straw returning machines.
Transportation scenario: Enhance the lightness of tractor steering through hydraulic steering assistance, adapting to road transfer.

6. Relevant models
Alternative models of the same series: RE241577 (slightly smaller displacement, suitable for low-power models such as 6B 904), RE241579 (high-pressure version, rated pressure 18MPa, used for the 1354 model equipped with heavy farm tools).
Structural derivative models: RE241580 (dual pump, suitable for multi-circuit hydraulic systems), RE241581 (integrated model with oil filter, simplifying system layout).
After-sales replacement model: Domestic imitation JD-241578 (price 60% of the original factory, compatibility needs to be verified through actual testing).