A2FE107/61W-VZL181-K A2FE28/61W-PAL10 A2FE56/61WVZL100 German Rexroth Quantitative Piston Motor A2FE Series Original Hydraulic Pump High Pressure

The A2FE series axial piston hydraulic motors are fixed-displacement motors designed for high-pressure hydrostatic drives in open or closed circuits. These motors feature a spherical piston design with robust construction, providing reliable performance in demanding industrial and mobile applications.

Featured models: A2FE107/61W-VZL181-K, A2FE28/61W-PAL10, and A2FE56/61W-VZL100

• High Pressure Operation: Continuous operating pressure up to 32 MPa, with peak pressure tolerance up to 31.5 MPa
• Spherical Piston Design: Self-aligning piston and cylinder block interface reduces wear and enhances efficiency
• Compact Installation: Central flange mounting allows for space-saving integration
• High Power Density: Optimized design delivers high torque output in a compact package
• Low Noise Operation: Optimized flow characteristics ensure quiet performance
• Versatile Circuit Compatibility: Suitable for both open and closed hydraulic circuits
• Long Service Life: Durable construction with high-quality materials

• Operating Fluid: Mineral-based hydraulic oil (ISO VG 32, 46, 68)
• Operating Temperature Range: -20°C to 90°C (ideal 30-65°C)
• Speed Range: 100-2800 rpm (continuous operation)
• Installation: Flange-mounted with central mounting flange
• Port Connections: SAE standard ports (varies by model suffix)
• Rotation: Bi-directional operation

• VZL181-K: Heavy-duty configuration with reinforced components and extended service life
• PAL10: Special configuration variant (may indicate specific porting, mounting, or performance characteristics)
• VZL100: Special configuration variant (may indicate specific port size or arrangement)

• Mobile Machinery: Excavators, wheel loaders, cranes, concrete pump trucks
• Industrial Equipment: Presses, conveyors, material handling systems
• Marine Applications: Winches, propulsion systems, deck machinery
• Construction Equipment: Drilling rigs, pile drivers, compactors
• Agricultural Machinery: Combine harvesters, tractors, irrigation systems

• Verify motor shaft rotates freely by hand
• Check for any visible damage during transport
• Ensure mounting surface is clean and flat
• Confirm hydraulic connections match port sizes

1. Alignment: Ensure motor shaft aligns with driven equipment without imposing radial or axial loads
2. Bolting: Use evenly tightened bolts (recommended torque: 80-100 Nm for M12 bolts)
3. Coupling: Use flexible coupling to accommodate minor misalignments
4. Port Connections: Use appropriate seals and ensure connections are leak-free

• Fluid Cleanliness: NAS 1638 Class 8 or better (ISO 4406 18/16/13)
• Filtration: Use filters with β₍₁₀₎ ≥ 100
• Oil Viscosity: 27-43 mm²/s at operating temperature
• System Flushing: Flush system before motor installation

1. Fill system with recommended hydraulic fluid
2. Vent air from system (crack connections at highest points)
3. Start system at low pressure and check for leaks
4. Gradually increase pressure to operating level
5. Monitor temperature during initial operation

• Daily: Check for leaks, unusual noise, or vibration
• Weekly: Check oil level and condition
• Every 500 hours: Check filter condition
• Every 1000-3000 hours: Change hydraulic oil (depending on operating conditions)
• Every 2000 hours: Check mounting bolts and connections

• Low Speed: Check system pressure and flow
• Overheating: Check oil level, cooling system, and load conditions
• Noise/Vibration: Check for air in system or mechanical issues
• Leakage: Check seals and connections

The primary difference is displacement: A2FE28 has 28 cm³/rev, A2FE56 has 56 cm³/rev, and A2FE107 has 107 cm³/rev. This displacement range allows selection based on torque requirements - A2FE107 provides approximately 3.8 times more torque than A2FE28 at the same pressure. Physical dimensions, weight, and flow requirements also increase with displacement.

The "PAL10" suffix typically indicates a special configuration variant with specific porting, mounting, or performance characteristics. The "10" numerical value may refer to port size, connection arrangement, or other design parameters. This configuration is optimized for particular applications or system requirements. Always refer to the manufacturer's documentation for exact specifications.

Theoretical torque output is calculated as: Torque (Nm) = Displacement (cm³/rev) × Pressure (MPa) ÷ 20π. At 20 MPa: A2FE28: ≈ 89 Nm. Actual torque will be slightly lower due to mechanical efficiency (typically 92-95%). This torque level makes A2FE28 suitable for applications requiring lower power output.

Flow requirement (L/min) = Displacement (cm³/rev) × Speed (rpm) ÷ 1000. At 2000 rpm: A2FE28: 56 L/min. This is the theoretical value; actual system flow should be slightly higher to account for internal leakage. Ensure your hydraulic pump can provide this flow at the required pressure.

The motors are designed for mineral-based hydraulic oils (ISO VG 32, 46, 68). Some synthetic fluids may be compatible, but this should be confirmed with the manufacturer before use. Synthetic fluids may require different seal materials or have different viscosity characteristics that could affect performance. Always consult the manufacturer's recommendations for fluid compatibility.

These products typically carry a standard warranty period of 12 months from date of installation or 18 months from date of shipment (whichever comes first), subject to proper installation and operation within specified parameters. Warranty terms may vary by manufacturer and region. For technical support, contact authorized service centers with the complete model number and serial number.