.1 General Design

• Type: Bent-axis axial piston motor
• Series: 51 / 51-1 variable displacement motor
• Displacement control: Hydro-mechanical / hydraulic proportional control
• Circuit type: Closed-loop hydrostatic system
• Frame size: 160 cm³/rev class

2.2 Displacement

• Maximum displacement (Vg max): ≈ 160 cm³/rev
• Minimum displacement (Vg min): ≈ 32 cm³/rev
• Displacement ratio: up to 5:1

2.3 Pressure Ratings

• Rated operating pressure: up to ~450 bar (typical system dependent)
• Peak pressure: up to ~500–510 bar
• Case pressure:
  • Normal: ~3 bar
  • Maximum (cold start): ~5 bar

2.4 Speed Range

• Rated speed (at max displacement): ≈ 2500 rpm
• Maximum speed (at min displacement): up to 5000–7000 rpm (depending on control version and system conditions)

2.5 Flow Capacity

• Rated flow: ≈ 400 L/min (frame size dependent system design value)
• Maximum flow: ≈ 500+ L/min

2.6 Torque & Power Characteristics

• High torque output at full displacement
• Suitable for heavy-duty hydrostatic traction drives
• Power capability: up to 600+ kW class (system dependent configuration)

2.7 Mechanical Features

• Integrated displacement limiter (mechanical stop)
• SAE / DIN mounting flange options
• Splined shaft options (DIN 5480 standard)
• Compact bent-axis design for high efficiency
• Low internal friction and high volumetric efficiency

2.8 Control Options

• Hydraulic proportional control (HZ type)
• Electric proportional control (EP/Electro-hydraulic variants)
• Mechanical servo control
• Pressure cut-off and loop flushing options (depending on configuration)

2.9 Typical Advantages

• High efficiency across full speed range
• Excellent low-speed torque stability
• Strong durability under high pressure cycles
• Suitable for heavy-duty continuous operation
• Flexible installation in compact driveline systems