OSPU hydraulic steering units
Danfoss has designed the OSPU as an alternative to dual-displacement steering units. With up to four-to-one flow amplification, it delivers best-in-class manual steering over a wide application range, providing displacements of 120 cm3 to 500 cm3 [7.32 in3 to 30.51 in3] with normal pump supply. A progressive-displacement option secures smooth performance in both slow and fast steering modes.
Features and benefits
- Displacement independent of steering speed
- Amplification factors: 1:2, 1:2.5, 1:3, or 1:4 linear and 1:2 progressive
- Steady increase in progressive flow at higher steering speeds
- Increases productivity and driver comfort
- Small installation dimensions
Applications
- Tractors
- Backhoe loaders
- Combines
- Telescopic handlers
- Wheel loaders
Specifications
| Ambient temperature | -30°C to 60°C [-22°F to 140°F] |
| Permissible surface temperature (non-activated unit) | 120°C [248°F] for 20 minutes |
| Permissible oil temperature | -30°C to 100°C [-22°F to 212°F] |
| Recommended oil temperature | 30°C to 60°C [86°F to 140°F] |
| Oil viscosity | 10 mm2/s to 1000 mm2/s [59 SUS to 4,629 SUS] |
| Recommended oil viscosity | 12 mm2/s to 80 mm2/s [66 SUS to 370 SUS] |
| Maximum contamination (ISO 4406) | ON/OR 22/20/17 LS/CN/PB 21/19/16 |
| Maximum temperature difference from other hydraulics | Δ10°C [Δ18°F] |
| Normal steering torque | 0.8 Nm to 3.0 Nm [7.08 lb-in to 26.55 lb-in] |
| Maximum manual steering torque | 120 Nm [1,062 lb-in] |
| Maximum momentary load steering torque | 240 Nm [2,124 lb-in] |
For more information, see Steering Technical Information.