4648857 Original Excavator Oil Temperature Radiator for ZX330-3 

The Hitachi original excavator oil temperature radiator (universal part number: 4648857) is a core component of the pure cooling system provided by Hitachi Construction Machinery. As an original spare part, it is designed specifically for Hitachi brand medium to large hydraulic excavators to ensure a perfect match with the equipment cooling system. This radiator is mainly suitable for multiple models in the Hitachi ZX series, including ZX350-3, ZX350LC-3, ZAXIS330-3, ZAXIS330LC-3, ZAXIS350LCN-3, ZAXIS350H-3, and ZAXIS350LC.
 

The oil temperature radiator is a key component of the excavator thermal management system. Its core function is to efficiently dissipate the heat of high-temperature oil in the hydraulic system or engine lubrication system to the atmosphere through forced air convection, maintaining the oil temperature within the optimal working range (usually 70-90 ° C) and ensuring stable system operation. As an original component, it usually adopts a fully aluminum plate fin structure, consisting of an aluminum heat dissipation core, a manifold, side plates, and sealing components. It has the characteristics of light weight, high heat dissipation efficiency, and corrosion resistance. The heat dissipation core is composed of dense fins and flat tubes, greatly increasing the heat dissipation area.
 

To ensure the long-term efficient operation of the radiator, regular inspections and cleaning maintenance are required. It is recommended to check the appearance of the radiator every 250 hours of work or once a week to remove dust, willow catkins, weeds, and other debris that may be blocked between the fins. Compressed air can be used to flush from the inside out or a low-pressure water gun can be used for reverse flushing, taking care to prevent the fins from tipping over. Regularly inspect all oil pipe joints and sealing gaskets for any signs of leakage. Every 1000 hours of work or in conjunction with regular maintenance, check whether the radiator bracket is secure to avoid weld cracking caused by vibration. After shutting down in cold regions during winter, if the equipment uses antifreeze, it is necessary to ensure that the freezing point of the coolant meets the requirements.