Understanding and properly operating the process of adding cooling fluid to the water tank is essential in the daily maintenance of the Cat excavator.The amount of water added to the water tank of the Cat excavator is not fixed and depends mainly on the actual volume of the tank and the current total amount of cooling fluid.In order to ensure that the cooling system of the excavators is functioning properly, the water tank would normally need to be added to the maximum capacity line, but not exceed.First, to examine the volume specifications of the Cat excavator water tank and, without special instructions, it is generally recommended that 10-15 per cent of the inflated space be retained to avoid a cooling fluid spill due to higher temperatures.In practice, the old cooling fluid should be removed (if replacement is required), then the inner water tank should be cleaned and a new cooling fluid added.Specific quantities of water may be added by reference to the data given in the equipment use manual, or by direct contact with the Caterpillar official to obtain accurate information.In addition, it is worth noting that for Cat excavators, not just fresh water, but special anti-frozen cooling fluids, which are effective in preventing winter ice freezes and summer overheating, but also corrosion-proof, scavenging and providing comprehensive protection for excavators engines.In summary, the key to determining precisely how much water the Cat excavator's water tank requires is to identify the total capacity of the tank and to reasonably control the infusion, taking into account the actual situation, and to follow the operational guidelines of the equipment manufacturer.In this context, it is emphasized that regular inspection and correct injection of the cooling fluid in the excavator water tank are an important part of ensuring the stability of Cat's excavator performance and the extension of its useful life.