One of the most important parts that protects the inner components that drive a power steering system is the input shaft seal. In order for a power steering system to operate, it must connect with a steering shaft. The steering shaft runs from the steering wheel and provides driver input to the power steering system. There are two seals that are used to make sure that dust does not enter while the power steering fluid is retained. The first seal is, quite literally, a dust cover. The second seal is the input shaft seal. This seal is responsible for preventing power steering fluid from leaking. If the seal is damaged, hydraulic fluid can leak from the power steering input shaft and eventually overheat the system or break down all together. So you can see why protecting these units is vital in order to keep your customers' vehicles in tip-top condition. So today, we're going to look at the most foolproof method used to install hydraulic power steering seals.