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Your Position: Home >Automobiles & Motorcycles >Power Steering Oil Seal vs. Power Steering Pump: What's the Difference?

Power Steering Oil Seal vs. Power Steering Pump: What's the Difference?

Oct. 08, 2023
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The power steering system is a vital component in modern vehicles, enhancing the ease of steering and driver control. Two essential elements of this system are the power steering oil seal and the power steering pump. While both play crucial roles in the functionality of your vehicle's power steering, they serve different purposes and are located in distinct areas of the system. 


Power Steering Oil Seal


Function: The power steering oil seal, also known as a shaft seal or input shaft seal, is a small but essential component in the power steering system. It is primarily responsible for sealing the input shaft of the steering gear or steering rack, preventing power steering fluid from leaking out and contaminants from entering the system.


Location: The power steering oil seal is typically located at the input shaft where it enters the steering gear or steering rack. It creates a barrier between the stationary part of the steering gear and the rotating input shaft.


Importance: The power steering oil seal's role in preventing fluid leaks is crucial. If the seal fails, power steering fluid can escape, leading to a loss of hydraulic pressure and reduced power steering assistance. Additionally, contaminants like dirt and debris can enter the system, potentially causing damage to other components.

Size 35*50*8 Power Steering Oil Seal High Pressure TC4P SCJY SCVT CNB GNB

Power Steering Pump


Function: The power steering pump is the heart of the power steering system. It is responsible for pressurizing the power steering fluid, making it easier for the driver to turn the steering wheel. The pump generates hydraulic pressure by drawing power steering fluid from the reservoir and then sending it to the steering gear or rack when needed.


Location: The power steering pump is typically located on the engine, driven by a belt or, in some cases, directly by the engine itself. It is connected to the power steering fluid reservoir and the steering gear or rack via hoses.


Importance: The power steering pump's function is critical for providing the hydraulic assistance required for smooth and effortless steering. Without it, steering a vehicle, especially at low speeds or when stationary, would be challenging and physically demanding.



In summary, the power steering oil seal and power steering pump are distinct components within the power steering system, each serving a unique purpose. The oil seal is responsible for preventing fluid leaks and contaminants from entering the system by sealing the input shaft, while the pump pressurizes and circulates the power steering fluid to aid in steering efforts. Both components are vital for the efficient and safe operation of your vehicle's power steering system, and understanding their roles can help you appreciate the importance of proper maintenance and timely replacements when necessary.


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