L2F12R2P4 L2F23R3Z4 L2F55R2P3 L2F80W2Z2 L2F250L5P2 Rexroth Hydraulic Piston Pump Motor

Product Overview

The L2F series is a range of fixed-displacement bent-axis piston pumps and motors, engineered for both open and closed hydraulic circuits. Designed to fully comply with Rexroth mounting and interface standards, the L2F series offers 100% direct interchangeability with original Rexroth units—enabling plug-and-play replacement without any管路 modifications or adapter plates, significantly minimizing downtime and retrofit costs.

The series features a bent-axis design with spherical port plate technology, allowing automatic centering during high-speed rotation, which reduces friction losses and enhances overall efficiency. The drive shaft is engineered to support radial loads, and the bearing system is optimized for high-load, high-speed operations. Every unit undergoes 100% factory testing under simulated real-world working conditions, validating pressure, flow, volumetric efficiency, and noise performance before shipment—ensuring reliable operation from the very first start.

Model Code Interpretation:

• L2F = Fixed displacement bent-axis piston pump/motor series

• Number (12/23/55/80/250) = Displacement in mL/r

• R/L/W = Direction of rotation (R=right, L=left, W=optional)

• P/Z/S = Control type and shaft end configuration

• Subsequent digits/letters = Specific configuration code

Technical Specifications 

L2F12R2P4 / L2F12L4P4

• Model: L2F12R2P4 / L2F12L4P4

• Displacement: 12 mL/r

• Nominal Pressure: 32 MPa

• Peak Pressure: 35 MPa

• Operating Temperature Range: 30–90℃

• Material: Cast iron housing

• Mounting Type: Flange mounting

• Medium: Hydraulic oil

L2F23R3Z4

• Model: L2F23R3Z4

• Displacement: 23 mL/r

• Nominal Pressure: 32 MPa

• Peak Pressure: 35 MPa

• Operating Temperature Range: 30–90℃

• Material: Cast iron housing

• Mounting Type: Flange mounting

• Medium: Hydraulic oil

L2F55R2P3

• Model: L2F55R2P3

• Displacement: 55 mL/r

• Nominal Pressure: 32 MPa

• Peak Pressure: 35 MPa

• Operating Temperature Range: 30–90℃

• Material: Cast iron housing

• Mounting Type: Flange mounting

• Medium: Hydraulic oil

L2F80W2Z2

• Model: L2F80W2Z2

• Displacement: 80 mL/r

• Nominal Pressure: 32 MPa

• Peak Pressure: 35 MPa

• Operating Temperature Range: 30–90℃

• Material: Cast iron housing

• Mounting Type: Flange mounting

• Medium: Hydraulic oil

L2F250L5P2

• Model: L2F250L5P2

• Displacement: 250 mL/r

• Nominal Pressure: 32 MPa

• Peak Pressure: 35 MPa

• Operating Temperature Range: 30–90℃

• Material: Cast iron housing

• Mounting Type: Flange mounting

• Medium: Hydraulic oil

Key Technical Advantages

1. 100% Direct Interchangeability – Zero Modification Required
The L2F series is engineered to exact Rexroth mounting and interface specifications, with identical dimensions, port locations, and shaft end configurations. End users can replace original units directly without any管路 modifications or adapter plates. Replacement time can be reduced to within 2 days per unit. This is particularly critical for mining and metallurgical applications where equipment uptime is paramount—transforming unplanned downtime into scheduled, rapid maintenance.

2. Spherical Port Plate Technology with Automatic Centering
The cylinder block and port plate employ a spherical porting design. During high-speed rotation, the spherical mating surfaces automatically self-center, compensating for manufacturing and assembly tolerances while minimizing internal leakage. This design also reduces the peripheral speed of the port plate pair, significantly improving volumetric efficiency and reducing friction-induced temperature rise.

3. High Radial Load Capacity
The drive shaft features a reinforced design capable of supporting radial loads. In applications involving belt or gear drives where radial loads are present, no additional bearing support is required—simplifying system architecture while enhancing reliability. High-performance bearings ensure long service life under 32 MPa nominal pressure and 35 MPa peak pressure conditions.

4. 100% Factory Testing Under Simulated Working Conditions
Every L2F series unit undergoes rigorous factory testing under simulated real-world conditions, validating pressure, flow, volumetric efficiency, noise levels, and thermal characteristics across the full speed range. Test media match actual operating conditions, ensuring each unit is ready for immediate installation and reliable operation upon delivery—eliminating the risk of “dead on arrival” components.

5. Low-Noise Design
The bent-axis configuration inherently offers superior noise characteristics compared to swashplate designs. Combined with precision gear manufacturing and optimized bearing selection, the L2F series maintains low sound pressure levels across the entire speed range—suitable for indoor and night-time operations with strict noise limitations.

Application Areas

The L2F series fixed displacement bent-axis piston pumps and motors are widely deployed across the following industries and equipment types:

• Mining Equipment: Track-mounted fully hydraulic drill rigs, underground support systems

• Construction Machinery: Excavators, cranes, concrete pump hydraulic systems

• Metallurgical Equipment: Forging presses, manipulator hydraulic systems

• Agricultural Machinery: Corn harvesters and large-scale agricultural equipment hydraulic drives

• Oil & Gas Drilling: Core drilling rigs, rotary drilling rig power head systems

• Marine & Industrial: Marine auxiliary equipment, industrial machinery hydrostatic transmissions

Expert Maintenance Tips

1. Hydraulic Fluid Cleanliness Management
The L2F series utilizes spherical port plate pairs with minimal clearances, making them highly sensitive to fluid contamination. It is recommended to install return line filters with ≤10μm filtration rating, maintaining fluid cleanliness to ISO 4406 18/13 or better. Never use degraded or substandard hydraulic fluids.

2. Scheduled Fluid Replacement
Replace hydraulic fluid and filters after the first 200 hours of operation. Under normal conditions, fluid should be replaced every 1,000–3,000 operating hours or every 6 months (whichever comes first). In harsh environments with high temperatures or heavy dust, shorten the replacement interval accordingly.

3. Air Bleeding Before Start-up
Always bleed air from the housing via the vent port before initial start-up or after extended shutdown periods to prevent cavitation damage. Ensure the pump/motor housing is completely filled with hydraulic fluid prior to starting.

4. Verify Rotation Direction
Before installation, confirm the rotation direction indicated in the model code—R for right-hand rotation, L for left-hand rotation, W for optional rotation. Incorrect rotation will reverse suction and pressure ports, causing severe damage.

5. Coupling Alignment Requirements
Maintain shaft alignment within 0.05 mm concentricity and 0.5° angular deviation between the drive shaft and the prime mover output shaft. Excessive misalignment will lead to premature bearing wear and shaft seal leakage.