HMF50-02 265 Linde Hydraulic Motor 51.3cc 420 bar

Product 1: HMF50-02 265 H2X292U01095 Fixed Displacement Motor

Product Overview

The HMF50-02 265 (Material No. H2X292U01095) is a Linde HMF-02 series swashplate axial piston fixed displacement hydraulic motor. With a displacement of 51.3 cc/rev, rated pressure of 420 bar, peak pressure of 500 bar, and maximum speed of 4,100 rpm, this open-circuit axial piston unit is widely deployed in hydraulic drive systems across mobile and industrial equipment.

This product offers a 100% genuine OEM-interchangeable solution, manufactured to Linde’s original quality standards. Every unit undergoes 100% simulated working condition testing to ensure field reliability matching original equipment performance. The motor features a high-strength cast iron housing with precision-ground friction pairs (cylinder block/valve plate and slippers/swashplate) for superior wear resistance and volumetric efficiency.

The HMF50-02 265 features a compact short-body design for easy installation. Bi-directional rotation capability makes it suitable for applications requiring both forward and reverse operation.

Technical Specifications

• Model: HMF50-02 265 (HMF 50-02 265)

• Material Number: H2X292U01095

• Manufacturer: Linde

• Product Type: Swashplate axial piston fixed displacement motor

• Displacement: 51.3 cc/rev

• Rated Pressure: 420 bar

• Peak Pressure: 500 bar

• Maximum Speed: 4,100 rpm

• Maximum Torque (at 420 bar): 366 Nm

• Direction of Rotation: Bi-directional

• Shaft End: Splined shaft

• Mounting Flange: SAE-C

• Port Connection: SAE 3/4″ (6,000 psi)

• Max Housing Pressure: 1.5 bar

• Weight: Approx. 18–19 kg

Key Technical Advantages

1. Fixed Displacement Design for Stable, Reliable Output
The HMF50-02 265 features a fixed displacement design with constant 51.3 cc/rev output, where flow is directly proportional to speed. This design eliminates potential failure points associated with variable mechanisms, offering superior simplicity and reliability for applications demanding consistent flow output.

2. Exceptional Pressure Capability and Power Density
With rated pressure of 420 bar and peak pressure of 500 bar, this motor delivers class-leading pressure capability. Producing 366 Nm of torque at 420 bar with a weight of just 19 kg, it achieves exceptional power density—ideal for lightweight mobile machinery designs.

3. Compact Short-Body Design for Superior Installation Flexibility
The short-body configuration significantly reduces overall length compared to conventional designs. The SAE-C two-bolt flange mounting simplifies assembly, offering outstanding installation adaptability in space-constrained equipment.

4. Bi-Directional Rotation and High-Speed Capability
Supports bi-directional rotation for applications requiring both forward and reverse drive. Maximum speed of 4,100 rpm makes it suitable for high-speed rotating drives such as harvester cutting mechanisms and fan drives.

5. Low Noise Operation and Extended Service Life
HMF-02 series axial piston units feature noise-optimized design, significantly reducing fluid pressure pulsation and operational noise. Precision-ground friction pairs and heavy-duty bearings ensure long-term reliable operation under continuous high-pressure conditions.

Application Areas

• Agricultural Machinery: Combine harvesters (including Claas series), feed mixers—drives cutting mechanisms, conveyor chains, fans, and auxiliary functions

• Construction Equipment: Mini-excavators, skid-steer loaders—provides travel drive and implement power

• Industrial Vehicles: Forklifts, telescopic handlers—material handling and lifting functions

• Forestry Equipment: Feller-bunchers, log skidders—delivers stable hydraulic power in harsh conditions

• Road Construction: Rollers, compactors—provides high-frequency hydraulic power for vibration mechanisms

Expert Maintenance Tips

1. Fluid Cleanliness Control
Maintain hydraulic fluid cleanliness to ISO 4406 18/15 or higher. Fixed displacement motors are sensitive to contamination, which accelerates wear on the valve plate and cylinder block face, reducing volumetric efficiency. Replace fluid and filters every 1,000–2,000 operating hours.

2. Installation Orientation and Housing Priming
Ensure the drain port is positioned above the motor housing’s highest point to maintain oil fill after shutdown. Before first startup, prime the housing through the drain port—never start dry.

3. Shaft Alignment Precision
For splined shaft connections, maintain coaxial alignment within 0.05 mm. Misalignment causes premature spline wear and abnormal bearing loads, significantly reducing service life.

4. Regular Leakage Monitoring
Periodically check drain line leakage. Abnormally increased drain flow typically indicates wear on the valve plate or cylinder block face, requiring timely service.

Product 2: HMV75-02 2571 H2X233U02294 Variable Displacement Motor

Product Overview

The HMV75-02 2571 (Material No. H2X233U02294) is a Linde HMV-02 series swashplate axial piston variable displacement motor. With a maximum displacement of 75.9 cc/rev, infinitely variable from maximum to zero, rated pressure of 450 bar, peak pressure of 500 bar, and maximum speed of 3,800–4,400 rpm, this motor delivers exceptional versatility.

This product offers a 100% genuine OEM-interchangeable solution manufactured to Linde’s original quality standards. Every unit undergoes 100% simulated working condition testing. The HMV75-02 supports both open and closed circuit operation, features SAE mounting flange, and offers optional through-drive and flushing valve configurations.

The HMV75-02 2571 is widely used in construction and agricultural equipment from Claas, O&K, Atlas, Caterpillar, and Liebherr.

Technical Specifications

• Model: HMV75-02 2571 (HMV 75-02 2571)

• Material Number: H2X233U02294

• Manufacturer: Linde

• Product Type: Swashplate axial piston variable displacement motor

• Max Displacement: 75.9 cc/rev

• Rated Pressure: 450 bar

• Peak Pressure: 500 bar

• Maximum Speed (at Vmax): 3,800 rpm

• Maximum Speed (at Vmin): 4,400 rpm

• Torque (at 430 bar): 519 Nm

• Circuit Type: Open circuit / Closed circuit

• Mounting Flange: SAE

• Through-Drive: Optional

• Flushing Valve: Optional

• Weight: Approx. 32 kg

Key Technical Advantages

1. Infinitely Variable Displacement for Wide Transmission Ratio Range
The swashplate variable design allows infinitely variable displacement from 75.9 cc/rev to zero. This provides an exceptionally wide transmission ratio range for hydrostatic drives, enabling smooth speed control from zero to maximum without mechanical gear shifting—significantly improving operational flexibility and fuel economy.

2. 450 bar Rated Pressure for Heavy-Duty Applications
With rated pressure of 450 bar and peak pressure of 500 bar, the HMV75-02 handles demanding applications such as excavator travel drives and harvester propulsion. Delivering 519 Nm of torque at 430 bar, it provides ample driving force for large mobile machinery.

3. Open/Closed Circuit Dual Compatibility
Supports both open and closed circuit operation, dramatically expanding application scope. Open circuit suits traditional fixed pump–variable motor systems, while closed circuit enables high-efficiency hydrostatic travel drives.

4. Optional Through-Drive and Flushing Valve
Through-drive option allows series mounting of additional pumps or motors. Optional flushing valve reduces oil temperature rise in closed circuits, extending overall system life.

5. Cartridge-Style Compact Construction
Features mid-mount insertion design with two-bolt flange for exceptional compactness. Optional speed sensor enables remote electro-hydraulic speed and torque control. Configurable with high-pressure overload relief valves, pilot control valves, and brake valves.

Application Areas

• Agricultural Machinery: Claas Jaguar 970 combine harvester—travel drive and header drive

• Construction Equipment: Wheeled excavators (e.g., Caterpillar M318), loaders—travel drive and implement drive

• Material Handling: Telescopic handlers, forklifts—travel drive and lift drive

• Forestry Equipment: Feller-bunchers, log skidders—travel power in challenging terrain

• Specialty Vehicles: Transit mixers, sweepers—drum or broom drive

• Industrial Equipment: Winches and drum drives—precisely controlled rotary power

Expert Maintenance Tips

1. Variable Mechanism Commissioning
The HMV75-02 variable mechanism consists of servo pistons and pilot control valves. During initial commissioning, strictly follow Linde Operating Instructions Series 02 for proper bleeding and setting of the variable mechanism. Never operate at high pressure before complete bleeding.

2. Fluid Cleanliness and Filtration
Variable motors demand high fluid cleanliness—maintain ISO 4406 16/13 or better. Use high-precision return filters (β10≥200). Replace filter elements after the first 50 operating hours.

3. Housing Pressure and Drain Lines
Maximum housing pressure must not exceed 2.5 bar. Drain lines must return directly to the tank—never parallel with return lines—to maintain housing pressure within limits. Keep drain lines as short and straight as possible to minimize back pressure.

4. Speed Sensor Maintenance
If equipped with a speed sensor, regularly inspect sensor mounting and signal cable integrity to ensure reliable signal transmission.

5. Restart After Extended Downtime
Before restarting after prolonged shutdown, manually rotate the shaft several revolutions to confirm free movement. Run at low speed with no load for at least 5 minutes before gradually loading to operating pressure.

Product 3: HMR135-02 2584 High-Pressure Feedback Variable Motor

Product Overview

The HMR135-02 2584 is a Linde HMR-02 series high-pressure feedback swashplate axial piston variable displacement motor. With a maximum displacement of 135 cc/rev, high-pressure feedback control, rated pressure of 450 bar, peak pressure of 500 bar, maximum speed of 3,200 rpm, and maximum torque of 928 Nm at 450 bar, this open-circuit axial piston unit delivers exceptional power.

The HMR135-02 features a unique “inverted piston” design where the piston encapsulates the slipper—significantly improving slipper retention on the swashplate and reducing the risk of slipper separation under high-speed, high-pressure conditions. The variable mechanism adjusts swashplate angle via dual variable pistons.

This product offers a 100% genuine OEM-interchangeable solution manufactured to Linde’s original quality standards. Every unit undergoes 100% simulated working condition testing.

Technical Specifications

• Model: HMR135-02 2584 (HMR 135-02 2584)

• Manufacturer: Linde

• Product Type: High-pressure feedback swashplate axial piston variable motor

• Max Displacement: 135 cc/rev

• Rated Pressure: 450 bar

• Peak Pressure: 500 bar

• Maximum Speed: 3,200 rpm

• Maximum Torque: 928 Nm

• Shaft End: Splined shaft

• Control Type: High-pressure feedback variable control

• Weight: Approx. 38 kg

Key Technical Advantages

1. High-Pressure Feedback Control for Fast, Precise Response
High-pressure feedback variable control adjusts displacement via system pressure acting directly on variable pistons. This control method responds rapidly, requires no external pilot oil source, and is ideally suited for travel drive applications with frequent pressure fluctuations. Feedback signals are taken directly from the system high-pressure line for high accuracy and minimal lag.

2. “Inverted Piston” Design for Superior Reliability
The HMR135-02 features a unique “inverted piston” design where the piston encapsulates the slipper. Compared to conventional slipper-over-piston designs, the inverted configuration provides superior slipper retention at high speeds and pressures, significantly reducing the risk of slipper separation and enhancing reliability under extreme conditions.

3. 135cc Large Displacement for Heavy-Duty Drive Requirements
With maximum displacement of 135 cc/rev and 928 Nm of torque at 450 bar rated pressure, the HMR135-02 is the ideal choice for travel drives in large wheeled excavators, large harvesters, and other heavy mobile machinery.

4. 500 bar Peak Pressure Capability for Shock Loads
Peak pressure rating of 500 bar enables the motor to withstand frequent pressure shocks in travel drive systems. High-strength cast iron housing and reinforced internal components ensure long-term reliability in demanding operating conditions.

5. Modular Design for Easy Maintenance
HMR-02 series features modular design philosophy, with major components (cylinder block, valve plate, variable pistons) individually replaceable. This significantly reduces maintenance costs and downtime, improving total cost of ownership.

Application Areas

• Construction Equipment: Wheeled excavators (e.g., Caterpillar M318, Volvo EW160B)—travel drive

• Agricultural Machinery: Large combine harvesters, forage harvesters—travel drive and implement drive

• Material Handling: Heavy-duty forklifts, telescopic handlers—travel drive

• Mining Equipment: Underground loaders, haul trucks—reliable travel power in harsh environments

• Specialty Vehicles: Concrete pump trucks, truck-mounted cranes—travel and implement drive

Expert Maintenance Tips

1. High-Pressure Feedback Line Inspection
HMR135-02 variable control relies on signal transmission through the high-pressure feedback line. During installation and maintenance, ensure the feedback line is clear and free from restrictions or blockages. All fittings must be securely tightened to prevent leaks that could cause control failure.

2. “Inverted Piston” Service Precautions
The HMR135-02 features “inverted piston” (piston-over-slipper) construction. When servicing or replacing piston assemblies, use Linde original special tools for piston/slipper pressing. Never use standard shop presses, which may damage piston ball ends or slipper sockets.

3. Swashplate and Variable Piston Inspection
The variable mechanism adjusts swashplate angle via dual variable pistons. Regularly inspect variable piston movement and seal condition. If variable response slows or fails to reach maximum displacement, check for piston sticking or seal failure.

4. Fluid Cleanliness Management
Maintain fluid cleanliness to ISO 4406 16/13 or better. The HMR135-02’s large displacement design means higher fluid flow and stricter contamination control requirements. Use high-precision filters (β10≥200).

5. Break-In Period Service
Newly installed or overhauled HMR135-02 units require a 50-hour break-in period. Avoid prolonged full-load operation during break-in—limit operating pressure to 80% of rated pressure. Replace hydraulic fluid and filters after the break-in period and re-verify control valve settings.