HMR135-02 2584 Linde Self-Regulating Motor 500 Bar

Product Overview

The Linde HMR135-02 2584 belongs to the Linde Hydraulics HMR-02 self-regulating variable displacement axial piston motor family for high-pressure open- and closed-circuit hydraulic systems.

Unlike an HMF fixed displacement motor, the HMR uses pressure-based self-regulation to vary displacement according to system load. Linde describes the HMR-02 as a motor with internal system-pressure control that requires no external control piping for the basic regulating function. The design is intended to provide stable low-speed behavior, high starting torque, a wide speed range, compact installation and high power density.

The complete search designation HMR135-02 2584 is retained for market identification. However, 2584 is not individually decoded in the public Linde technical documents reviewed, so it should not be used to infer a shaft, valve, displacement or control specification without nameplate or OEM documentation.

For aftermarket applications, the replacement target should therefore be defined by both mechanical interchangeability and hydraulic control compatibility, followed by 100% simulated working-condition testing.

Technical Specifications

• Brand: Linde Hydraulics
• Complete Search Model: HMR135-02 2584
• Core Model: HMR135-02
• Series: HMR-02
• Product Type: Self-regulating variable displacement axial piston motor
• Circuit: Open and closed circuit
• Maximum Displacement: 135.6 cm³/rev
• Nominal Pressure: 420 bar in the current Linde China product summary
• Peak Pressure: 500 bar intermittent
• Maximum Operating Speed at Vmax: 3200 rpm
• Intermittent Maximum Speed at Vmin: 4000 rpm in the current Linde China summary
• Maximum Operating Speed at Vmin: 3700 rpm in the detailed Series 02 catalogue
• Transient Maximum Speed at Vmax: 3500 rpm in the detailed Series 02 catalogue
• Continuous Output Torque: 540 Nm in the current Linde China product summary
• Maximum Output Torque: 907 Nm in the current Linde China product summary
• Continuous Power: 181 kW
• Maximum Power: 304 kW
• Approximate Weight: 56 kg without oil
• Maximum Housing Pressure: approximately 2.5 bar
• Basic Control Principle: Internal system-pressure self-regulation
• Maximum Displacement Override: Pneumatic, hydraulic or electric options are available within the HMR-02 platform
• Interface Platform: SAE high-pressure ports, SAE mounting flange, ANSI or SAE spline shaft depending on configuration

Specification note: Another Linde product catalogue lists HMR135-02 at 450 bar nominal pressure / 500 bar maximum pressure and approximately 928 Nm at Δp = 430 bar. Since this differs from the current Linde China summary, the final pressure and torque rating for an individual 2584 unit should be confirmed against its exact OEM data sheet or nameplate before contractual specification.

Key Technical Advantages

1. Pressure-Regulated Self-Adjustment

The HMR-02 regulates displacement according to system pressure. Under lower system pressure the motor shifts toward lower displacement, while increasing pressure causes the motor to increase displacement to generate the torque required by the application.

This gives the travel drive a useful balance between speed and torque without requiring a conventional external displacement-control circuit.

2. 21° Swashplate Technology

Linde Series 02 units use a 21° swashplate concept. The optimized piston-slipper assembly allows a relatively large swash angle while maintaining a compact rotating group.

Linde identifies compact dimensions, long service life and high power density as direct benefits of the 21° design.

3. Hydrostatic Bearing Support

The Series 02 rotating group incorporates a hydrostatic bearing concept for axial-force compensation.

According to Linde’s product catalogue, this reduces the axial loading of the rotating group and contributes to longer service life.

4. Wear-Resistant Steel-on-Steel Piston-Slipper Assembly

Linde’s Series 02 technical description specifically refers to a steel-on-steel material combination for the piston-slipper assembly and associates the design with wear resistance and long service life.

For replacement manufacturing and remanufacturing, piston shoes, cylinder block geometry, swashplate contact surfaces and valve-plate condition should therefore be treated as critical quality-control items.

5. High Starting Torque and Stable Low-Speed Operation

Linde identifies stable low-speed performance and high starting torque as key HMR-02 advantages. These characteristics are particularly relevant to travel drives that need to start under load and maintain traction over changing terrain.

6. Compact High-Power-Density Package

The Series 02 architecture integrates the rotating group, housing, control elements and hydraulic interfaces into a compact package.

Linde specifically lists compact design, high power density, reliability, service life and dynamic response among the HMR-02 product advantages.

Application Areas

Typical applications include:

• Wheeled excavators
• Crawler construction machinery
• Hydrostatic travel drives
• Heavy construction equipment
• Material-handling machines
• Traction and winch systems
• Mobile machinery requiring high starting torque
• High-pressure open- and closed-circuit drives

Linde’s official construction-machine documentation specifically shows HMR135-02 as a travel motor on a 20-ton wheeled excavator, integrated with an HPR pump, HMF swing motor, VT valve system and LINC/CEB control technology.

Expert Maintenance Tips

1. Do Not Service It as a Fixed Displacement Motor

HMR135-02 is a self-regulating variable motor, not an HMF fixed displacement motor.

Commissioning must therefore verify both:

• Hydraulic output performance;
• Displacement response versus system pressure.

A simple maximum-speed test is not sufficient.

2. Test Low-Speed Starting Torque

After overhaul or replacement, gradually test:

• Zero-speed start;
• Low-speed/high-load operation;
• Medium-pressure operation;
• High-pressure loading;
• High-speed/light-load operation.

Abnormal vibration, pressure spikes or weak starting torque can indicate problems in the rotating group or pressure-regulation system.

3. Monitor Housing Pressure

The published Series 02 data specify a maximum housing pressure around 2.5 bar.

Check for:

• Restricted drain lines;
• Return filter blockage;
• Excessive back pressure;
• Shaft-seal leakage;
• Improper housing drainage.

4. Inspect the Rotating Group

During overhaul, inspect:

• Cylinder block;
• Valve plate;
• Pistons;
• Piston shoes;
• Retainer plate;
• Swashplate;
• Bearings.

Even relatively small valve-plate or cylinder-block surface damage can increase internal leakage and reduce volumetric efficiency.

5. Verify Pressure-Regulation Behavior

A professional test should record:

• Regulation start pressure;
• Displacement response;
• Vmax;
• Vmin;
• Maximum-displacement override;
• Return response after pressure reduction.

This is much more meaningful than a simple “motor runs” test.

6. Confirm the Complete Mechanical Interface

For HMR135-02 2584, verify:

• Shaft type;
• Rotation;
• Mounting flange;
• Working-port arrangement;
• Housing drain;
• Control configuration;
• Maximum-displacement limitation;
• Through-drive/PTO arrangement;
• Speed sensor;
• Counterbalance valve.

The 2584 suffix should be confirmed through the original nameplate or OEM documentation before assuming a specific interface configuration.

7. Perform 100% Simulated Working-Condition Testing

Recommended final testing includes:

• Start-up;
• Low-speed/high-torque operation;
• Pressure regulation;
• Vmax/Vmin displacement response;
• Maximum-displacement limitation;
• High-pressure loading;
• Housing leakage;
• Temperature rise;
• Noise;
• Vibration;
• Long-duration thermal stability.

This converts Interchangeability from a dimensional replacement claim into a verified hydraulic-function replacement.

Engineering Verification Statement

For technical SEO and product-page accuracy, the recommended primary product identity is:

HMR135-02 2584 — Linde Self-Regulating Variable Displacement Piston Motor

not:

HMR135-02 2584 — Fixed Displacement Hydraulic Pump

Linde’s official documentation clearly separates HMR-02 self-regulating motors from HMF/HMA fixed displacement motors and HPV/HPR pump families.

For the exact 2584 configuration, the public Linde documents reviewed confirm the HMR135-02 family parameters but do not independently decode every character of the 2584 identifier. Procurement should therefore use the nameplate, OEM equipment parts documentation and physical-interface verification for the final configuration match.