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1.What are the core technical parameters of the pump?
| Parameter | Specification |
|---|---|
| Nominal Displacement | 45 cm³/rev |
| Maximum Working Pressure | 350 bar (5075 psi) |
| Rated Working Pressure | 315 bar (4568 psi) |
| Maximum Speed | 2600 rpm |
| Minimum Speed | 500 rpm |
| Oil Viscosity Range | 10 – 400 mm²/s (1 mm²/s = 1 cSt) |
| Recommended Oil Temperature | -20°C to +90°C (-4°F to 194°F) |
| Oil Filtration Requirement | ≥ 10 μm (complies with ISO 4406 Class 16/13) |
| Control Signal (Hydraulic Pilot) | 0.8 – 2.5 bar (pilot pressure range for flow/pressure adjustment) |
| Shaft Type | Straight Keyed Shaft (ISO 286-2, Diameter: 35 mm / 1.38 in) |
| Mounting Standard | SAE J744 (5-bolt flange) |
| Inlet/Outlet Port Size | Inlet: G1 1/4″ (BSPP thread), Outlet: G1″ (BSPP thread) |
| Dry Weight | Approximately 32 kg (70.5 lbs) |
| Volumetric Efficiency | ≥ 95% (under rated pressure and speed) |
| Mechanical Efficiency | ≥ 92% (under rated pressure and speed) |
2. What are the key performance advantages of this pump?
- Enhanced Damping Control (DRG): The integrated “G” damping configuration reduces pressure ripples by 30% compared to standard DR models, making it ideal for systems sensitive to pressure stability (e.g., precision hydraulic actuators, small hydraulic presses).
- Dual Integrated Valves: Combined pressure relief + unloader valve (VU) simplifies hydraulic system design—unloader function reduces idle wear, extending the pump’s service life to ≥ 8,000 operating hours.
- High Connection Rigidity: SAE 5-bolt flange (52R) provides stronger vibration resistance than 3-bolt flanges, suitable for high-vibration mobile machinery (e.g., compact excavators, skid steer loaders).
- Wide Environmental Adaptability: Operates reliably in extreme temperatures (-20°C to +90°C) and variable oil viscosities, compatible with both mineral-based and synthetic hydraulic oils.
- Genuine OEM Compatibility: Part number R902534315 ensures 100% interchangeability with Rexroth’s original A10VO45DRG series, guaranteeing seamless replacement in OEM systems.
3. Which applications is this pump suitable for?
The A10VO45DRG/52R-VUC12N00 (Part No.: R902534315) is engineered for medium-flow, high-stability hydraulic systems, including:
- Small-to-medium construction machinery (compact excavators, skid steer loaders, small hydraulic cranes)
- Industrial equipment (plastic injection molding machines, small hydraulic presses, conveyor drive systems)
- Agricultural machinery (medium tractors, irrigation pumps, combine harvester auxiliary hydraulic systems)
- Marine auxiliary equipment (small ship deck machinery, steering gear for inland vessels)
- Precision test benches and custom hydraulic power units (requiring low pressure fluctuation)
4. What are the installation requirements?
- Concentricity & Coupling: Ensure the concentricity between the pump and driving motor is ≤ 0.1 mm. Use a flexible coupling to absorb vibration and avoid shaft wear caused by misalignment.
- Mounting Base: Install the pump on a rigid, level base with shock-absorbing rubber pads to reduce vibration transmission.
- Priming & Inlet Pressure: Before initial startup, fill the pump with clean hydraulic oil (ISO VG 46 recommended) to prevent dry running. Maintain inlet oil pressure at 0.5 – 2 bar to avoid cavitation.
- Rotation Direction: Confirm the pump’s clockwise rotation (viewed from the shaft end) matches the motor’s rotation direction—reverse rotation may damage internal components.
- Pilot Pressure Connection: Ensure the hydraulic pilot signal line is unobstructed and connected to the system’s control valve for accurate pressure/flow adjustment.
