3035853 Original Excavator Drive Gear for ZX330

Part number 3035853 is the original transmission gear specially designed by Hitachi for the ZX330 series medium-sized hydraulic excavator. This component is the core transmission component in equipment transmission systems, such as walking reduction mechanisms, rotating mechanisms, or working device drive boxes. Its universal models usually cover models with similar platforms and tonnages such as ZX330-3G, ZX330-5G, and ZX350. As the core power transmission component of the original factory, its module, number of teeth, pressure angle, and installation aperture are precisely matched with the paired gears and drive shaft

This product is a transmission gear precision forged and processed from high-strength alloy steel. The gear body is silver gray and is made of high-quality alloy steel precision forged to ensure complete internal fiber flow lines and high matrix strength. The tooth part undergoes carburizing quenching and grinding processes, and the tooth surface hardness can reach HRC 58-62, with extremely high wear resistance, pitting corrosion resistance, and fatigue resistance. The finely ground tooth profile ensures smooth, low-noise meshing and efficient power transmission with the paired gears. The precision inner hole of the center is usually designed with splines or key slots for achieving high torque connection with the drive shaft without slip. Its dimensional accuracy and dynamic balance level are controlled according to the strict standards of the original factory, which is the foundation for ensuring the long-term and quiet operation of the entire transmission system.

Installation and inspection: Before installation, the gear inner hole, mating shaft, and housing cavity must be thoroughly cleaned to ensure that there are no impurities. During installation, it is necessary to ensure that the gears are absolutely aligned with the shaft and use a special tool to press them in smoothly. Daily inspection: Every 500 working hours, check the gearbox for any abnormal noise, abnormal temperature rise, and whether there are any abnormal metal debris in the lubricating oil. Regular maintenance: Strictly replace the designated heavy-duty gear oil according to the maintenance manual's prescribed cycle (usually every 2000 working hours), clean the magnetic oil drain plug, and determine the wear condition of the gear pair based on the amount of iron filings adsorbed.