Power steering hoses carry high-pressure power steering fluid from the power steering pump to the power steering rack to reduce the effort required to steer a vehicle. Fluid returns from the power steering rack to the power steering reservoir by means of a low pressure return hose.
To replace power steering hoses, fluid is removed from the power steering reservoir, and the defective hose is replaced. Next, the hose clamps and sealing washers are replaced, and the system is refilled with power steering fluid. Then the vehicle is driven and checked for leaks.
The fluid level in a power steering system should not require topping up. If itl does require topping up, this is a sign of a leak that needs to be investigated. If the power steering system is allowed to operate with a low fluid level, damage may occur.