Nitrogen-added pressure control is essential when the Cat excavator is engaged in nitrogen system maintenance.Normally, the inflatable pressure of the cat-digger nitrogen cylinders should be kept within an accurate range, with generally recommended values ranging from 10 to 12 MPa (Mpa), but with reference to the technical specifications of the excavator or user manual for different types and batches of excavators.In order to ensure the stability and durability of the hydraulic system of the excavator, excessive or low nitrogen pressure can have adverse effects on equipment performance.First, it is clear that the purpose of nitrogen injection is to maintain the good working condition of excavators and accumulators, that excessive pressure may lead to premature wear and even rupture of the internal seals of these components, and that too low pressure does not provide sufficient support to affect the efficiency and operational comfort of the excavators.Therefore, during the process of adding nitrogen to the Cat excavator, operators need to use specialized nitrogen filling equipment and operate in strict compliance with standard steps set by the manufacturer to monitor the inflating pressure in real time to ensure that the appropriate pressure level is met and maintained.In conclusion, we cannot generalize on the issue of `the pressure on the Cat excavator with nitrogen', but we must be flexible and accurate in accordance with the specific model, the plant set-up and current conditions.