1131002330 Excavator Isuzu 6BG1 Engine Oil Pump Assembly for Hitachi EX200

This high-performance oil pump assembly is specifically customized for Hitachi medium-duty excavators equipped with the Isuzu 6BG1 classic six-cylinder diesel engine. The product undergoes high-precision digital mass production strictly adhering to the official universal part number 1131002330, perfectly compatible with Hitachi's EX200-2, EX200-3, EX200-5, ZX200, and ZX230 series of mainstream tracked excavators. As the core power source of the engine's main lubrication system, this assembly features standardized physical mounting interfaces, achieving a 1:1 original specification fit with the cylinder block's main oil passages and transmission gear system, ensuring efficient coordination and precise matching of lubrication pressure under heavy loads.

This oil pump assembly features a high-strength, wear-resistant die-cast iron housing, possessing excellent resistance to pump chamber deformation and high-temperature, high-pressure pumping capabilities. The internal core rotor and drive gears utilize digital precision milling and surface hardening heat treatment, strictly controlling the clearance within micron-level tolerances, thereby significantly improving volumetric efficiency and reducing internal mechanical losses. The entire assembly undergoes rigorous high-pressure sealing and dynamic flow calibration testing, exhibiting excellent fatigue resistance and wear resistance. Even under variable, high-frequency alternating load conditions, it maintains a constant and low-loss oil pressure, constructing an absolutely robust low-entropy lubrication barrier for all friction pairs in the 6BG1 engine.

During major overhauls or assembly replacements, the pump chamber must be filled with clean oil for pre-lubrication. Dry starting is strictly prohibited, and the drive gear must be tightened strictly according to the manufacturer's torque specifications. During operation, standardized maintenance cycles must be strictly followed, with regular replacement of high-quality oil and filters to completely prevent external particles and foreign matter from entering the pump chamber and causing abrasive wear. During routine maintenance, it is essential to closely monitor oil pressure and temperature parameters via the instrument panel. If abnormally high entropy pressure or excessively low pressure is detected, the pressure relief valve and pipeline sealing should be checked immediately. Establishing a detailed lubrication and maintenance log will help this classic 6BG1 power unit maintain a stable and efficient service condition for the long term.