A2FE Series Hydraulic Motors
A2FE107/61W-VAL181-S, A2FE107/61W-VZL192J-S, A2FE107/61W-VAL100, A2FE125/61W-VZL181-S
Product Overview
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.
Key Features & Benefits
- 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
Technical Specifications
| Model |
Displacement (cm³/rev) |
Pressure Rating (MPa) |
Shaft Type |
Weight (Approx.) |
Key Features |
| A2FE107/61W-VAL181-S |
107 |
32 |
Splined |
25-27 kg |
Heavy-duty configuration, standard porting |
| A2FE107/61W-VZL192J-S |
107 |
32 |
Splined |
25-27 kg |
Special configuration with enhanced features |
| A2FE107/61W-VAL100 |
107 |
32 |
Splined |
25-27 kg |
Special porting or configuration variant |
| A2FE125/61W-VZL181-S |
125 |
32 |
Splined |
28-30 kg |
Heavy-duty configuration, standard porting |
Common Specifications:
- 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
Model Suffix Explanation
- VAL181-S: Heavy-duty configuration with standard porting arrangement
- VZL192J-S: Special configuration with specific porting, sealing, or mounting features
- VAL100: Special configuration variant (may indicate specific port size or arrangement)
- VZL181-S: Heavy-duty configuration with standard porting (A2FE125 model)
Applications
- 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
Installation Guidelines
Pre-Installation Checks
- 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
Mounting Procedure
- Alignment: Ensure motor shaft aligns with driven equipment without imposing radial or axial loads
- Bolting: Use evenly tightened bolts (recommended torque: 80-100 Nm for M12 bolts)
- Coupling: Use flexible coupling to accommodate minor misalignments
- Port Connections: Use appropriate seals and ensure connections are leak-free
Hydraulic System Requirements
- 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
Maintenance & Operation
Start-Up Procedure
- Fill system with recommended hydraulic fluid
- Vent air from system (crack connections at highest points)
- Start system at low pressure and check for leaks
- Gradually increase pressure to operating level
- Monitor temperature during initial operation
Routine Maintenance
- 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
Troubleshooting Signs
- 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
Frequently Asked Questions
What is the main difference between A2FE107 and A2FE125 models?
The primary difference is displacement: A2FE107 models have 107 cm³/rev displacement, while A2FE125 models have 125 cm³/rev. This means A2FE125 motors can deliver approximately 17% higher torque at the same pressure, making them suitable for applications requiring more power. Physical dimensions and mounting may differ, and flow requirements will be higher for the larger displacement motor.
What does the "VAL181-S" suffix indicate compared to "VZL181-S"?
Both suffixes indicate heavy-duty configurations with "181" design variation, but the "VAL" and "VZL" prefixes typically denote different porting arrangements or connection configurations. "VAL" often indicates standard porting with specific features, while "VZL" may indicate alternative porting or special mounting. The "S" suffix generally indicates standard configuration. Always refer to the manufacturer's documentation for exact differences.
What is the torque output difference between A2FE107 and A2FE125 at 28 MPa pressure?
Theoretical torque output is calculated as: Torque (Nm) = Displacement (cm³/rev) × Pressure (MPa) ÷ 20π. At 28 MPa: A2FE107: ≈ 477 Nm, A2FE125: ≈ 557 Nm. Actual torque will be slightly lower due to mechanical efficiency (typically 92-95%). The A2FE125 provides approximately 17% more torque at the same pressure.
What does the "VAL100" suffix mean on A2FE107 models?
The "VAL100" suffix likely indicates a special configuration variant, possibly with different port sizes, connection arrangements, or internal components compared to other VAL configurations. The numerical value "100" typically refers to specific design parameters such as port size, mounting dimensions, or performance characteristics. This configuration may be optimized for specific applications or system requirements. Always consult the manufacturer's documentation for precise specifications.
Can these motors be used in high-temperature environments beyond 90°C?
The specified maximum operating temperature is 90°C. Operating above this temperature may cause accelerated wear, seal degradation, and reduced service life. For applications requiring higher temperature operation, consult the manufacturer for special high-temperature seals or modified configurations. Some models may have optional high-temperature seals available, but this should be confirmed with the manufacturer before installation.
Warranty & Support
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.
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