A2FE56/61W-VAL027-S A2FE56/61W-VZL027F-SK A2FE56/61W-VZAL027F-SK A2FE56/61W-VZL181-K Made in Germany A2FE56 series quantitative piston pump motor Rexroth hydraulic pump
The A2FE56 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.
- 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 into mechanical gearboxes
- High Power Density: Optimized design delivers high torque output in a compact package
- Low Noise Operation: Optimized flow characteristics and precision manufacturing ensure quiet performance
- Versatile Circuit Compatibility: Suitable for both open and closed hydraulic circuits
- Long Service Life: Durable construction with high-quality materials and precision components
| Model | Displacement (cm³/rev) | Pressure Rating (MPa) | Shaft Type | Weight (Approx.) | Key Features |
|---|---|---|---|---|---|
| A2FE56/61W-VAL027-S | 56 | 32 | Splined | 16-18 kg | Standard configuration, open circuit |
| A2FE56/61W-VZL027F-SK | 56 | 32 | Splined | 16-18 kg | Flange-mounted, with special sealing |
| A2FE56/61W-VZAL027F-SK | 56 | 32 | Splined | 16-18 kg | Enhanced sealing, special porting |
| A2FE56/61W-VZL181-K | 56 | 32 | Splined | 16-18 kg | Heavy-duty configuration, extended life |
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
- VAL027-S: Standard open circuit configuration with specific porting
- VZL027F-SK: Flange-mounted with special sealing arrangement
- VZAL027F-SK: Enhanced sealing and porting configuration
- VZL181-K: Heavy-duty version with reinforced components
- 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
- 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
- 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
- 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
- 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 suffixes indicate specific configuration differences in porting, sealing, and mounting arrangements. For example:
- VAL series typically indicates standard open circuit configuration
- VZL series often includes special flange mounting or sealing features
- VZAL indicates enhanced sealing and porting arrangements
- -SK suffix may indicate special sealing or connection requirements
Always refer to the specific product datasheet for exact configuration details, as suffix meanings can vary by manufacturer and application.
Yes, A2FE56 series motors are designed to operate in both open and closed hydraulic circuits. However, specific model configurations may be optimized for one circuit type. For example, models with "VZL" or "VZAL" suffixes may have features better suited for closed circuits. Always verify the model's circuit compatibility in the technical documentation before installation.
Use mineral-based hydraulic oil with ISO VG 32, 46, or 68 viscosity grade, depending on operating temperature. The oil should meet DIN 51524 Part 2 (HLP) or equivalent standards. Oil change intervals depend on operating conditions:
- Normal conditions: Every 2000-3000 operating hours
- Severe conditions (high temperature, contamination): Every 1000 hours
- Based on oil analysis: Follow oil condition monitoring results
Always maintain oil cleanliness at NAS 1638 Class 8 or better.
Replacement parts should be sourced from authorized distributors or the original manufacturer. Key identification information includes:
- Complete model number (including all suffixes)
- Serial number (if available)
- Date of manufacture
- Part numbers from the original parts list
Using non-genuine parts may void warranties and affect performance. Always use seals and components specified for the exact model.
Common issues include:
- Seal failure: Caused by contamination, high temperature, or improper installation. Prevention: Maintain oil cleanliness, monitor temperature, use correct installation procedures.
- Bearing wear: Due to misalignment, contamination, or overload. Prevention: Ensure proper alignment, use clean oil, avoid exceeding rated loads.
- Internal wear: From contaminated oil or improper operation. Prevention: Regular oil changes, proper filtration, correct operating parameters.
Regular maintenance and operating within specified parameters significantly extend motor life.
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 - consult the specific product documentation for details. For technical support, contact authorized service centers or the manufacturer's technical support team with the complete model number and serial number.
Note: This product information is based on general specifications for A2FE series hydraulic motors. Always refer to the specific product datasheet and installation manual for the exact model you are using, as specifications may vary between manufacturers and specific configurations. Operating outside specified parameters may void warranties and cause equipment damage. Last updated: January 2026
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