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Eaton’s patented VersaSteer™ technology provides the functionality of operator selectable dual steering systems/modes with one integrated steering control unit. An Eaton Series 10 or 20 steering control unit equipped with VersaSteer technology, dramatically increases productivity and operator satisfaction, while reducing fatigue and effort (up to 95%).

Square housing with side ports
Round housing with end ports
Round housing with side ports

The Series 10 steering unit is a robust design with balanced architecture that is based on proven technology. Eaton’s new Series 10 steering units are a blend of all the capabilities of the previous Standard and Metric Steering units with some new, exciting features. The Series 10 is the only steering unit on the market capable of 275 bar [4000 psi] continuous pressure rating. This product line also has a square mounting pattern for interchangeability with both Eaton standard and metric units as well as competitive units from Danfoss, Ognibene, and M&S

Series 3, 6, 12 - The Series 3, 6, and 12 units provide traditional power steering for applications that don’t require integral valve capability. The Series 10 units, however, will be replacing this product line. Existing customers will be transitioning to and all new customers will be offered the Series 10.

Series 4 - The Series 4 units provide power steering for light to medium duty applications on smaller sized vehicles. These units offer similar features to the Series 3, 6, and 12 units. The Series 5 units, however, will be replacing this product line. Existing customers will be transitioning to and most new customers will be offered the Series 5

Steering Control Units Series 110, 230, 450 - The Series 110, 230, 450 units provide traditional power steering for applications that require integral valve capability. The Series 10 units, however, will be replacing this product line. Existing customers will be transitioning to and all new customers will be offered the Series 10.

Steering Control Units - Dual Displacement - The dual displacement steering control unit allows manufacturers of off road vehicles to retain manual steering capabilities while reducing the number of components in their system. By using two displacements in one unit we offer a better solution to manually steer a vehicle in an unpowered mode without the need of a back-up power system - resulting in a more economical machine. The dual displacement steering unit uses two gerotors and a pressure controlled logic valve. The logic valve switches between two displacements, one displacement for manual steering and the total of both displacements for powered operation. The logic valve is spring returned to the smaller manual displacement when inlet pressure falls below 8 bar [120 psi]. Above 8 bar [120 psi] the logic valve connects both gerotors to provide full powered displacement.

Engages the small displacement in an unpowered mode and allows manual steering.

Allows vehicles to meet ISO/TUV road regulations without the need of the currently used emergency system.

Steering circuit: Load Sensing Dynamic Signal
Max. system pressure: 240 bar [3500 psi]
Valve options and other features: same as available on Series 230 units

The Series 20 - steering control unit continues Eaton's tradition of innovative design and high quality that began with the first fluid linked power steering system. You can count on this steering unit to provide the same smooth, predictable steering as the Char-Lynn® steering units that provide dependable, trouble-free steering on applications around the world.

Provides much smoother steering function by minimizing jerky motion on articulated vehicles.

Jerk-reducing valves and accumulators can be eliminated on most vehicles, providing customer savings through fewer components required and reduced system cost.

Symmetrical valving provides passageways and valving that are equally placed, and pressure areas that are staged for minimum internal leakage. This results in balance, precise servo response and uniform left or right steering action.

Eaton's high capacity gerotor provides ample fluid displacement from an even more compact unit than was previously offered.

A thicker sleeve design provides stability, especially during pressure and thermal transient conditions.

The seal and centering spring designs provide positive, low-effort steering feel to ensure excellent vehicle control, an important feature for the vehicles for which these steering control units were designed.

The Series 25 - steering control unit includes two patented designs that make it even more responsive, reliable and cost effective.

Articulated Vehicles

Scrapers Frame Vehicles

Large Front End Loaders

Symmetrical valving provides passageways and valving that are equal in both directions and pressure areas that are staged for minimum leakage. This gives balance, precise servo response and uniform steering action in both directions.

Progressive valving makes it possible to produce the spool/sleeve valve in a way that assures reliability and reduces costs.

Eaton's high capacity gerotor assembly provides a lot of capacity in a small package.

Heavier valve components-housing, spool and sleeve-provides stability, especially during pressure and thermal transient conditions.

The seal and centering spring designs provides positive, low-effort steering feel assuring excellent vehicle control, an important feature on large vehicles for which this steering control was designed.

Cylinder port relief/check valves are needed on any machine that is subject to high steering cylinder pressures caused by external loads. For example, when one edge of an articulated front end loader bucket encounters an obstruction (external load), the full force of the load and the momentum of the machine causes the machine to buckle at the articulation point and raise pressure in the steering cylinders far in excess of system pressure. This pressure must be relieved to absorb the impact load and prevent damage to the hydraulic system and to the machine itself.

The traditional method of relieving system pressure involves interruption of cylinder port lines with a variety of fittings and plumbing. By designing cylinder port relief valve integral to the steering control unit housing, Series 25 steering control units equipped with cylinder port relief valves eliminate the additional hardware used to relieve pressure and return oil to the tank.

Pilot Pressure Port*

*This is an added feature that can be used for.... 1)...pilot pressure to priority valve. 2)...diagnostics.

The Series 40 steering control unit includes two patented designs that make it even more responsive, reliable and cost effective.

Progressive valving makes it possible to produce the spool/sleeve valve in a way that assures reliability and reduces costs.

Eaton's high capacity gerotor assembly provides a lot of capacity in a small package. Heavier valve components- housing, spool and sleeve-provide stability, especially during pressure and thermal transient conditions. The seal and centering spring designs provides positive, low-effort steering feel assuring excellent vehicle control, an important feature on large vehicles for which this steering control was designed.

Char-Lynn ® torque generators have been completely redesigned to meet the needs of the changing market place. These torque generators providing power assist for steering, also eliminating the large hand wheels on gate valves, and providing powerful rotary motion with effortless manual rotary input on numerous other applications.

Today's market includes power steering on electric lift trucks. Char-Lynn® torque generators have been designed with features that greatly improve the operator's comfort as well as the vehicles performance. The increase in port surface area allows for the additional port requirement for units with:

Power Beyond
This version has three ports: Inlet (IN), Tank (OUT), and Excess Flow (EF). In the power beyond configuration, flow not used for priority steering exiting the EF port and is available for the downstream reach function. Flow used for steering will exit the (OUT) port to tank, and cannot be used for auxiliary functions.

Load Sensing
Char-Lynn® load sensing torque generators use conventional or load sensing power supplies to achieve load sensing steering. The use of a load sensing torque generator and a priority valve in a normal power steering circuit offers the following advantages:

Provides smooth pressure compensated steering because load variations in the steering circuit do not affect axle response or maximum steering rate.
Provides true power beyond system capability by splitting the system into two independent circuits. Only the flow required by the steering maneuver goes to the steering circuit. Flow not required for steering is available for use in the auxiliary circuits.
Provides reliable operation because the steering circuit always has flow and pressure priority.
Char-Lynn® load sensing torque generators and priority valves can be used with open center, closed center or load sensing systems. Use in an open center system with a fixed displacement pump or a closed center system with a pressure compensated pump, either way offers may of the features of a load sensing system. Excess flow is available for auxiliary circuits

Features

Series 5 Performance Data

Features

Series 10 Performance Data

Features

Series 3, 6, 12 Performance Data

Features

Series 4 Performance Data

Features

Series 110, 230, 450 Performance Data

Manual Steering in unpowered mode

Dual Displacement - Performance Data

Features

Series 20 Performance Data

Features

Series 25 Performance Data

Features

Series 40 Performance Data

Specifictations 217 Series Geroter Unit

Specifictations 227 Series Geroler® Unit