What maintains the hydraulic system's overpressure?

The pressure relief valve plays a crucial role in maintaining the hydraulic system's overpressure. Its primary function is to limit the maximum pressure within the hydraulic system to prevent damage. When the pressure exceeds a preset threshold, the pressure relief valve opens, allowing hydraulic fluid to escape back to the reservoir or redirecting it within the system, thereby relieving excess pressure. This ensures that the hydraulic components operate safely within their designed pressure limits, preventing potential failures or malfunctions.

To provide context, while the power steering boost assists in steering control, it does not manage system pressure. Load sensors are used to monitor the load and adjust system performance accordingly but do not regulate pressure. The hydraulic accumulator stores energy in the form of pressurized fluid but does not actively relieve pressure like the pressure relief valve. Therefore, the pressure relief valve is essential for maintaining system integrity and safety.