Series 25 hydraulic steering units
Our high-efficiency series 25 steering units provide precise control. Available with flow rates from 95 l/min to 189 l/min [25 US gal/min to 50 US gal/min] for pressures up to 240 bar [3,500 psi], they feature a balanced architecture and an optimized thick-sleeve design that provides reliable, smooth performance even when pressures and temperatures change quickly.
Features and benefits
- Balanced architecture and optimized design provide precision, efficiency, reliability, and smooth performance, even under transient pressure and thermal conditions
- Symmetrical valving increases balance for precise servo response and uniform steering action, while progressive valving reduces operating costs
- Seal and centering spring designs provide positive, low-effort steering for excellent vehicle control
- Optional Q-Amp and wide-angle technology maximize steering control
- Optional pilot-pressure port can be used for diagnostics or increased priority valve flow
- High-grade ductile-iron housing provides increased strength for demanding applications
- High-capacity gerotor provides significant flow and displacement in a compact package
Applications
- Loaders
- Dump trucks
- Mining equipment
- Transporters
- Articulated and fixed-frame vehicles
Drawings and specifications
| Ambient temperature | -30°C to 60°C [-22°F to 140°F] |
| Permissible oil temperature | -30°C to 93°C [-22°F to 200°F] |
| Recommended oil | Pestroleum-based fluids |
| Maximum contamination (ISO 4406) | ON/OR 18/13 LS/CN/PB 18/13 |
| Maximum temperature difference from other hydraulics | Δ28°C [Δ50°F] |
| Normal steering torque | 2.8 Nm to 3.4 Nm [25 lb-in to 30 lb-in] |
| Manual steering | not possible |
