Coil-hydraulic steering control is an assisted system in which hydraulic power helps a separate mechanical system. A fully hydraulic steering control system, on the other hand, differs from a coil-hydraulic system in that the vehicle receives its steering stability solely from hydraulics.
Hydraulic steering stabilizers work similar to the coil-hydraulic system -- minus the coil spring. Rather than using a compression coil spring to bring the wheels back into place and a hydraulic piston to dampen the action, in this case, hydraulics are doing all of the work. As mentioned earlier, other than being mounted horizontally, a hydraulic steering stabilizer looks like and acts similar to a shock absorber in your car's suspension.
Hydraulic steering stabilizers are typically used for large tow vehicles. They provide greater steering stability, better control and smoothness, all under the stress of extra weight.
The newest steering stabilizers on the towing market use gas springs. Learn how they work on the next page.