4619904 Original Excavator Louver for ZX200-3

The original louver part number 4619904 is a cooling system adjustment component provided by Hitachi Construction Machinery for the ZX200-3 series hydraulic excavator (with a total working weight of 19.4-20.3 tons). The louver is installed in front of the radiator, and the cooling air flow is controlled by adjusting the opening and closing angle of the blades, thereby accurately managing the operating temperature of the engine and hydraulic system. Its universal models usually cover models of ZX200-3G, ZX200-5G and similar series, as well as excavators of similar tonnage such as ZX210 and ZX240. As an original sheet metal component, it is deeply matched with the vehicle's cooling air duct. The use of non-standard auxiliary parts is strictly prohibited to ensure ventilation efficiency and temperature control accuracy.

This product is an original adjustable louver, usually made of aluminum alloy profiles (surface sprayed) or galvanized steel plates. Typical technical parameters: blade width 50-100mm, blade spacing 60-120mm, maximum opening and closing angle 0-90 °, protection level IP54. The regulating mechanism may be manually pulled by a rope/knob or driven by an electric motor, and the working voltage of electric models is usually DC 12-24V. The louver frame is fixed to the radiator cover with bolts, and the blades are synchronously opened and closed through linkage rods. This component complies with safety standards such as ISO 3449 and GB/T 17300, and can effectively prevent dust, water, and foreign objects from entering. It also works stably in environments ranging from -30 ℃ to+120 ℃.

Inspection cycle: It is recommended to check whether the louver blades are deformed or stuck every 250 working hours, and whether the adjustment mechanism is flexible; Clean the dust, oil stains, and blockages on the surface of the blades every 500 working hours. Operation points: 1 During the high temperature season (ambient temperature>30 ℃), it is necessary to ensure that the blinds are fully opened to maximize the heat dissipation airflow; During cold seasons (ambient temperature<0 ℃), it can be appropriately turned off to 30-50 ° C to reduce heat loss and help the engine warm up quickly; 3. It is recommended to partially open (45 °) and install a dust screen under sandstorm conditions. Fault diagnosis: If the engine overheats or has poor heat dissipation, check whether the louvers are stuck, the linkage rod is detached, or the motor is damaged; If the adjustment fails, the hinge shaft should be inspected and lubricated immediately (using lithium based grease). Preventive maintenance: It is recommended to disassemble, clean, and inspect all fastening bolts (torque 15-25N · m) every 2000 working hours; Regularly test the limit switch and circuit connection of the electric model.