The two hoses are the high-pressure hose, carrying pressurized fluid from the power steering pump to the steering gear, and the low-pressure return hose, which returns fluid from the steering gear back to the reservoir or pump inlet.
In a typical hydraulic power steering setup, this arrangement keeps fluid circulating and pressurizes the system to aid steering. The high-pressure line must withstand higher psi and delivers fluid to the rack or steering box, while the return line handles lower pressure and feeds fluid back to the reservoir to be recirculated. Hoses are usually reinforced rubber or metal-braided lines with sturdy fittings, routed through the engine bay to the steering gear.
How the two hoses fit into the system
Here is a concise breakdown of the two hoses and their functions in the power steering circuit:
- High-pressure hose — carries pressurized hydraulic fluid from the power steering pump to the steering gear (rack or box). It is typically reinforced (often metal-braided) to handle high pressures and fitted at both ends to secure connections. Leaks or cracks here can cause a loss of steering assist and audible whining.
- Low-pressure return hose — returns fluid from the steering gear back to the reservoir or pump inlet. It operates at much lower pressure and is usually more flexible. Leaks or swelling can lead to reservoir depletion, air in the system, or poor steering feel.
In short, these two lines form the essential path for hydraulic fluid to be pressurized for steering assistance and then recycled back into the reservoir for continuous operation.
Location, anatomy, and maintenance
High-pressure hose
The high-pressure hose runs from the power steering pump to the steering rack or box. It is typically metal-braided or reinforced rubber and uses robust fittings at both ends. Inspect for cracks, bulges, fluid seepage near fittings, or any stiffness in the hose. If you notice a leak or a dramatic drop in steering performance, the high-pressure hose is a common culprit and should be inspected or replaced.
Low-pressure return hose
The low-pressure return hose carries fluid from the steering gear back to the reservoir or pump inlet. It is usually more flexible rubber and can be routed along the engine bay with clamps protecting it from heat and contact with moving parts. Check for cracking, softness, or leaks along the length of the hose and at clamp points. Replace if signs of wear are evident to prevent loss of fluid and air infiltration.
Note: Some newer vehicles use electric power steering or a combination of electric and hydraulic systems. In many traditional setups, however, the two hoses described above—the high-pressure line and the low-pressure return line—remain the core components of the hydraulic power steering circuit.
Summary
In a conventional hydraulic power steering system, the two hoses are the high-pressure hose that delivers fluid from the pump to the steering gear and the low-pressure return hose that sends fluid back to the reservoir. Together, they enable hydraulic assistance and circulating flow, supporting smooth and responsive steering. Regular inspection for leaks, cracks, or wear at fittings is key to maintaining reliable performance.
Does the Audi A5 have power steering fluid?
A5 3.0 TDI 245 quattro 8F (2007-2017) 09/11-12/17. A special synthetic oil based hydraulic fluid for power steering, central hydraulic and suspension level control systems.
What are the two power steering hoses?
There are primarily two types of power steering hoses:
- High-pressure hose(Power Steering Pressure Hose): Transports fluid from the pump to the steering gear.
- Low-pressure hose(Return Hose): Returns the low-pressure fluid from the steering gear.
What are the two lines from the power steering pump?
A set of hoses (or lines) connect the steering gear to the power steering pump. The hose that carries pressurized fluid from the pump to the gear is called the pressure hose. Meanwhile, the hose that routes fluid from the gear back to the pump is called the return hose.
Which hose is which on power steering?
Pressure Side vs.
Every power steering system has two hoses. The high-pressure hose runs from the pump outlet to the steering box inlet, and the low-pressure return hose runs from the steering box back to the pump reservoir. They serve very different purposes, and they are not interchangeable.