If you've ever tried to steer a modern car or truck while it's powered off ... to push hydraulic power steering fluid through the system. That pressure applies more force to the steering assembly ...

In recent years, electric power steering systems ... One of the keys to making EPAS viable on trucks has been the migration from older recirculating ball steering systems to lower friction ...

The power-steering pump pressurizes the hydraulic fluid that helps the driver turn the steering wheel. Signs of steering-pump failure include leaks, noises or decreased assistance while steering.