In the maintenance and maintenance of the Cat excavator, the recharge of hydraulic fluids is a key element.First, we need to make it clear that the capacity of the hydraulic systems of the different type Cat excavators varies, so it is important to refer to the precise parameters provided in the equipment manual before adding hydraulic fluids.In general, the standard hydraulic fluid for the Cat320D excavator is about 200-250 litres, but for information purposes only, the actual increase should be based on the specific type.The correct selection and injection of hydraulic fluids is essential to ensure the proper functioning of the excavator hydraulic system and to extend its useful life.Avoid excess or insufficient hydraulic fluids during operation that cause damage to hydraulic components or affect overall performance.Periodic inspection of hydraulic fluid levels to maintain appropriate infusion and use of hydraulic oil products recommended by the former plant or of the same quality.In summary, for the injection of hydraulic fluid from the Cat excavator, it is critical to determine the standard capacity according to the specific type of machine, to precisely control the infusion, and to combine the day-to-day maintenance and inspection in order to ensure that the excavator works efficiently and steadily.Further information on the selection and injection methods of hydraulic fluids in Cat excavators can be obtained by consulting relevant technical staff or consulting the detailed product use manual for professional guidance.