HPR105-02 H2X254B01770 Linde Hydraulic Piston Pump 105cc 420 Bar

Product Overview

The HPR105-02 and HPV105-02 belong to the Linde Hydraulics (now LHY Powertrain) 02-generation high-pressure swashplate axial piston variable displacement pump family. The HPR-02 is a self-regulating pump for open-circuit operation, specifically designed for working hydraulics with load-sensing control that adjusts displacement precisely according to load demand for energy-saving “flow-on-demand” operation. The HPV-02 is a variable displacement pump for closed-circuit operation, primarily used in hydrostatic drive systems, enabling stepless speed control and direction reversal through swashplate angle adjustment.

The H2X254B01770 is the complete part number corresponding to the HPR105-02 specification—105 cc/rev displacement with right-hand rotation. This coding enables precise matching of the original Linde pump’s mounting interface, control type, and port configuration, ensuring direct on-site replacement without piping modification or adapters.

Both pumps feature a 21° swashplate design with displacements ranging from 55 to 280 cc/rev. The HPR-02 is rated at 420 bar nominal pressure with 500 bar peak pressure. All controllers are based on load-independent adjustment mechanisms—regardless of whether mechanical, hydraulic, or electrical control is used, identical control commands always produce consistent machine responses. Every pump undergoes 100% simulated operating-condition testing before shipment, including rated pressure hold, flow characteristic verification, and control response validation.

Technical Specifications 

Model Identification:

• HPR105-02 0001 — Open-circuit self-regulating pump, 105 cc/rev, load-sensing control

• H2X254B01770 — Complete part number corresponding to HPR105-02

• HPV105-02 — Closed-circuit variable pump, 105 cc/rev, for hydrostatic drive

• HPR75-02 — Open-circuit, 75.9 cc/rev

• HPV135-02 — Closed-circuit, 135.7 cc/rev

• HPV210-02 — Closed-circuit, 210.1 cc/rev

Displacement (HPR-02 Series):

• HPR55: 55.0 cc/rev

• HPR75: 75.9 cc/rev

• HPR105: 105.0 cc/rev

• HPR135: 135.7 cc/rev

• HPR165: 165.6 cc/rev

• HPR210: 210.1 cc/rev

• HPR280: 281.9 cc/rev

Displacement (HPV-02 Series):

• HPV55: 54.7 cc/rev

• HPV75: 75.9 cc/rev

• HPV105: 105.0 cc/rev

• HPV135: 135.7 cc/rev

• HPV165: 165.6 cc/rev

• HPV210: 210.1 cc/rev

• HPV280: 281.9 cc/rev

Pressure Ratings (HPR105-02):

• Nominal pressure (continuous): 420 bar

• Peak pressure (intermittent): 500 bar

• Maximum housing pressure: 2.5 bar

Pressure Ratings (HPV105-02):

• Nominal pressure (continuous): 450 bar

• Peak pressure (intermittent): 500 bar

Speed Range (HPR105-02):

• Maximum operating speed: 2500 rpm (rated); 3200 rpm intermittent

• Maximum flow: 246.8 L/min at 2500 rpm

Speed Range (HPV105-02):

• Maximum operating speed: 3200 rpm

• Minimum operating speed: 500 rpm

Control Options (HPR-02):

• LP — Load sensing with pressure cut-off

• H1L — Load sensing with hydraulic ΔpLS override

• E1L — Load sensing with electrical ΔpLS override

• LEP — Load sensing with electric stroke limiter and pressure cut-off

• ETP — Electro-proportional with hyperbolic power limiter and pressure cut-off

• TL2 — Load sensing with hyperbolic power limiter

Structural Parameters:

• Pump type: High-pressure swashplate axial piston variable displacement

• Swashplate angle: 21°

• Circuit type: HPR-02 open circuit / HPV-02 closed circuit

• Mounting standard: ISO 3019-2 / SAE J617A

• Drive shaft: SAE involute spline

• Rotation: Clockwise (CW) / Counter-clockwise (CCW)

• Through-drive: Optional SAE A/B/C flange

• Hydraulic fluid: ISO VG32 / VG46 / VG68 anti-wear hydraulic oil

• Operating viscosity range: 10-1000 cSt (optimal 20-60 cSt)

• Operating oil temperature: -20°C to +90°C

• Weight (HPR105-02): Approx. 50 kg (standard LP control)

Key Technical Advantages

1. 21° Swashplate Design Delivers High Power Density

The 02-generation pumps feature a 21° swashplate angle, achieving larger displacement and higher power density within the same envelope compared to traditional small-angle swashplate pumps. The HPR105-02 delivers 246.8 L/min flow at 2500 rpm with 172.7 kW corner power. The compact one-piece high-strength housing design reduces leak points while fitting within the tight engine compartments of mobile machinery.

2. Load-Independent Adjustment Mechanism Ensures Precise Control

All control types in the 02 generation are based on a load-independent adjustment mechanism—regardless of whether mechanical, hydraulic, or electrical control is used, identical control commands always produce the same displacement output, unaffected by load pressure fluctuations. This provides operators with precise and repeatable machine response, particularly valuable for fine-controlled drive and working hydraulic systems.

3. SPU Silencer Optimizes Noise Emission

The SPU silencer developed by LHY Powertrain reduces pressure pulsations across the entire operating range by connecting an additional volume directly at the commutation point of the HPR-02 pump—without power loss. Combined with optimized noise-reduction design, the HPR-02 operates at noise levels comparable to closed-circuit pumps, helping mobile machinery manufacturers meet increasingly stringent noise emission regulations.

4. Hydrostatically Balanced Rotating Group Ensures Long Service Life

The pump’s rotating group features hydrostatic balancing, with axial forces counteracted by a hydrostatic balancing mechanism. The swashplate is supported by polymer-coated journal bearings, effectively reducing friction coefficients. The HPR-02 exhibits excellent self-priming capability across its rated speed range. Linde high-pressure piston components are designed for outstanding reliability and long service life, ensuring stable operation at 420 bar continuous duty through optimized material selection and precision machining processes.

5. Modular Control Options for Diverse Applications

The HPR-02 offers six control options—LP, H1L, E1L, LEP, ETP, and TL2—covering the full range from basic load sensing to electro-proportional power limiting. Combined with Linde LSC synchronization control systems and LinTronic electronic control units, precise synchronized control of multiple actuators and on-demand flow distribution can be achieved, delivering significant system energy savings.

Application Areas

• Wheel loaders and excavator hydraulic systems

• Rotary drilling rigs and concrete pump trucks

• Bulldozers and tracked construction machinery

• Agricultural machinery (combine harvesters, tractors)

• Forestry machinery and wheeled harvesters

• Forklifts and material handling equipment

• Cranes and aerial work platforms

Expert Maintenance Tips

1. Pre-Installation Model Verification

Verify the complete model code on the pump nameplate before installation. The HPR-02 and HPV-02 share identical mounting interface dimensions, but their circuit types differ (HPR-02 = open circuit; HPV-02 = closed circuit) and must not be interchanged. The H2X254B01770 complete part number must be cross-referenced against the equipment’s original nameplate. Confirm rotation direction (CW/CCW) and drive shaft spline specification match the equipment.

2. Hydraulic Fluid and Cleanliness Requirements

Use ISO VG32 / VG46 / VG68 anti-wear hydraulic oil. Optimal operating viscosity range: 20-60 cSt; operating viscosity limits: 10-1000 cSt. Fluid cleanliness should be no lower than ISO 4406 18/16/13. Suction filter rating should be no coarser than 10 μm.

3. Load Sensing Line Connection (HPR-02 Specific)

The LS port line of the HPR-02 must be connected to the system load signal port. The line must remain sealed with no leakage. When used with Linde LSC control systems, ensure all actuator load signals are correctly combined into the LS line. LS line leakage prevents the pump from properly responding to load demand.

4. First Start-Up Procedure

Fill the pump housing with clean hydraulic oil before first start. Run at 500-800 rpm unloaded for 5-10 minutes to purge air. Case drain back pressure must not exceed 2.5 bar. The drain line end should always remain submerged below the reservoir oil level. Confirm no suction line leakage before gradually increasing speed and loading to rated conditions.

5. Routine Maintenance

Replace hydraulic oil filters every 2,000 operating hours or annually. Periodically inspect the pump exterior for leaks and check the drive shaft seal condition. If flow decline or pressure instability is observed, prioritize inspection of the valve plate and piston-cylinder wear. Recommended overhaul interval: no more than 8,000 operating hours or 5 years.