4433064 Original Excavator Air-Con Duct Fits for Hitachi ZX200

Part number 4433064 is a specialized part number for Hitachi's original excavator air conditioning duct. This air duct is a key ventilation duct used in excavator air conditioning or heating systems to transport cold and warm air, connect the air outlet with the air conditioning box or heater core. As an original standard component, it is mainly suitable for Hitachi's multiple series of hydraulic excavators, such as the EX series (such as EX200, EX300, EX350). This part may correspond to commonly used heat-resistant and oil resistant rubber or plastic corrugated pipes in the aftermarket, but to ensure that its size, bending radius, temperature resistance, and sealing performance fully meet the original vehicle air duct layout and system pressure requirements, it is necessary to verify the specific excavator model, cab configuration, and installation position of the air duct (such as under the dashboard, roof, or side wall).
 

The original air conditioning duct is usually made of high-quality heat-resistant and cold resistant synthetic rubber or silicone material, and may have a fabric reinforcement layer or spiral steel wire support inside to maintain the tube shape, prevent collapse, and have good flexibility to adapt to equipment vibration. Its design shall meet the harsh working conditions of construction machinery, and have excellent high and low temperature resistance (usually applicable to the temperature range of -40 ° C to 120 ° C), anti-aging, ozone resistance, oil resistance and certain wear resistance. Both ends of the air duct are equipped with dedicated quick connectors or clamp interfaces to ensure a secure and well sealed connection with the evaporator box, mixing air door, and air outlet grille.

The maintenance core of this air duct lies in regular inspection, cleaning, and preventive replacement. The air duct is a rubber consumable part, and it is usually recommended to replace it preventively every 30000 working hours or every 5 winters (whichever comes first), or immediately replace it once obvious aging, hardening, cracking, or a significant decrease in air conditioning airflow is found. Installation specifications: When dismantling old pipes, pay attention to marking the connection direction; Before installing the new pipe, ensure that the connection port is clean and free of burrs; During installation, avoid excessive twisting or stretching, and use original clamps or fittings to tighten to the specified torque to ensure sealing.