The two lines connected to a typical power steering pump are the low‑pressure suction line from the reservoir into the pump and the high‑pressure discharge line from the pump to the steering gear. These two hoses establish the fluid path that provides hydraulic assist to the steering system.
Power steering systems use hydraulic fluid to amplify steering effort. The pump draws fluid from the reservoir, pressurizes it, and sends it through a high‑pressure line to the steering gear or rack. Fluid returns to the reservoir (or circulates back through the steering gear and then to the reservoir), completing the loop. Different makes and models may route return fluid differently, but the fundamental two-pipe arrangement around the pump remains consistent.
Two main lines tied to the power steering pump
The lines that connect directly to the pump handle fluid entry and exit, enabling circulation and pressure generation within the system. The items below describe these two lines and their roles.
- Low-pressure suction/inlet line: draws hydraulic fluid from the reservoir into the pump at near-ambient pressure.
- High-pressure discharge/outlet line: carries pressurized fluid from the pump to the steering gear or rack to provide assist.
Together, these lines create the core flow path for powered steering. In many systems, a separate return line from the steering gear back to the reservoir completes the loop, but the pump itself primarily handles the inlet and high‑pressure outlet connections.
Common variations by vehicle
Some configurations route return fluid directly back to the reservoir, while others route it through the pump or steering gear before returning to the reservoir. The exact routing can vary by vehicle make, model, and year, but the pump’s two main connections (inlet and high‑pressure outlet) remain the essential pair to understand.
Summary
In most power steering setups, the two lines connected to the pump are the suction line from the reservoir to the pump (low pressure) and the discharge line from the pump to the steering gear (high pressure). A separate return path from the steering gear to the reservoir completes the hydraulic loop. Always consult your vehicle’s service manual for exact routing, as designs differ between models.
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.
Does Grease Monkey change power steering fluid?
Grease Monkey provides fluid exchange services for critical vehicle systems, including engine oil, transmission fluid, coolant (radiator fluid), brake fluid, and power steering fluid.
What are the two hoses on a power steering pump?
Power Steering Hoses – There are two main hoses, a high side and a low side. The high side hose brings pressurized power steering fluid to provide power to the steering inputs. The low side hose moves low pressure fluid back to the pump.
Which line is the return line on a power steering pump?
Or even the long shaft power steering gearbox. It's all the same the low pressure is closest to the input shaft. And the high pressure is closest to the fourbolt.