1113210790 Genuine Timing Gear Cover for Isuzu 6BG1 Engine Hitachi Excavator Parts

Part number 1113210790 is a special part number for the original timing gear cover of the Isuzu 6BG1 series diesel engine, which serves as the core sealing and protective component of Hitachi excavator engines. This component is designed specifically for Hitachi ZX series hydraulic excavators equipped with Isuzu 6BG1/6BG1T engines. According to publicly available accessory compatibility information, it is widely compatible with models such as Hitachi ZX200-3G and ZX240-3G. In the after-sales market, this part is often referred to as "6BG1 timing cover" or "timing gear chamber cover". To ensure a perfect match with the front end of the engine and reliable sealing performance, the part number (1113210790) must be verified during procurement. Due to slight differences in engine production batches, providing the complete model and engine serial number of the excavator when ordering can help further confirm compatibility.

The timing gear cover is a key protective and sealing housing for the front timing transmission system of the engine. Its core function is to seal and protect the precision transmission components such as crankshaft timing gears, camshaft gears, and idlers inside, forming a closed gear chamber to prevent external pollutants such as dust and moisture from entering, while ensuring that the oil splashed and lubricated by the gears does not leak, maintaining the cleanliness and stable lubrication pressure inside the engine. As an original component, it is usually made of high-strength aluminum alloy or cast iron precision casting, with excellent rigidity and deformation resistance to withstand engine vibration and thermal loads. The joint surface between the cover and the cylinder body is precision machined and equipped with specialized rubber or composite material sealing gaskets to ensure reliable sealing even in long-term high temperature and oil immersed environments.

The maintenance core of the timing gear cover lies in preventing leaks, ensuring sealing, and inspecting related systems. Regular inspection: It is recommended to visually inspect the surroundings and lower part of the timing gear cover for oil stains or sludge accumulation every 500 working hours or every 6 months. This is a sign of aging gaskets or loose bolts causing leakage. Sealing maintenance: If leakage is found, it must be dealt with promptly. Usually, it is necessary to remove the timing gear cover, thoroughly clean the joint surface between the cylinder block and the cover, replace the original sealing gasket, and re tighten all fixing bolts according to the manufacturer's specified sequence and torque value (usually 20-40 N · m). Related inspection: When disassembling the timing cover for major repairs or oil leakage treatment, the meshing clearance and tooth surface wear of the internal timing gear, as well as the presence of abnormal noise or looseness in the idler bearing, should be checked simultaneously.