4343268 CAP For HITACHI EX200-5E 6RB1

The water tank cover is the protective cover of the excavator cooling water tank. Its function is to protect the water tank from being polluted by foreign debris, dust and other sundries, and to play the role of heat insulation and heat preservation. At the same time, the water tank cover can also reduce waste gas emission and play an environmental protection role. The water tank cover consists of a shell, a spring, a sealing gasket and a valve. When the spring pushes the sealing gasket, the water tank is sealed to ensure that the cooling system works under a certain pressure. When the pressure of the cooling system is too high, the cooling liquid pushes the spring open and the cooling liquid overflows into the auxiliary kettle. When the engine water temperature drops, a certain negative pressure is generated in the water tank, and the cooling liquid in the auxiliary kettle is sucked back to the water tank through the valve plate in the middle of the water tank cover. The water tank cover of excavator plays an important role in protecting the normal operation of hydraulic system, and its structure and working principle also ensure its stability and reliability under various working conditions.

The main functions of the water tank cover of the excavator include protecting the water in the water tank from pollution, avoiding air intake and air bubbles in the water pump, and ensuring the normal operation of the hydraulic system. The water tank cover can effectively prevent impurities such as sundries, dust, sand and the like from entering the water tank, so as to prevent the water from being polluted and affecting the use effect. If the water in the water tank is polluted, it will affect the normal work of the hydraulic system and even lead to system failure. The water tank cover can also avoid the phenomenon of air intake and air bubbles in the water pump. If the water level in the water tank drops, negative pressure will be generated, which will cause air intake or bubble phenomenon of the water pump. These two phenomena will affect the normal work of the hydraulic system and lead to the failure of the excavator. The water in the water tank is the cooling liquid in the hydraulic system. If the cover of the water tank is not properly covered, the water will evaporate, which will cause the water surface to drop, thus affecting the normal work of the hydraulic system. In addition, the water tank cover can also prevent water from overflowing during transportation and ensure the normal work of the hydraulic system. The water tank cover plays a vital role in the vehicle cooling system, which not only maintains the pressure balance and coolant flow of the system, but also prevents external pollutants from entering the system. Therefore, it is very important to keep the water tank cover intact and in normal working condition to ensure the normal operation of the engine and prolong its service life.