1876182580 Genuine Isuzu 4HK1 turbocharger for Hitachi ZX230-3 excavator.

The turbocharger (model RHF55, alternative part number 8-97362839-0) corresponding to part number 1-87618258-0 is the original equipment component for the Isuzu 4HK1 (including 4HK1-T/TC/E2N) engine of Hitachi ZX230-3 excavators, and is also compatible with ZX200-3/ZX210-3 and other same-platform models. It adopts a single-turbo single-scroll supercharging structure with a maximum boost pressure of up to 1.8 bar. Matching the engine's 5.193L displacement, it can make the engine's rated power reach 125kW/2000rpm and the maximum torque reach 606N·m/1600rpm, which greatly improves the intake efficiency and ensures the whole machine has sufficient power and rapid response under working conditions such as earthwork and infrastructure construction.

The turbine housing is cast from high-temperature-resistant nickel-based alloy, the rotor shaft is made of martensitic stainless steel treated with nitriding, and the blades are made of titanium-aluminum alloy, featuring excellent high-temperature resistance and fatigue resistance. The floating bearing uses high-wear-resistant Babbitt alloy, combined with a fully sealed oil seal, which effectively prevents oil leakage and dust intrusion. This turbocharger is suitable for operating environments from -30°C to 50°C, with a trouble-free service life of more than 8,000 hours under normal maintenance. Under harsh working conditions such as dust, heavy load and frequent starts and stops, it can maintain stable boost pressure without failures such as air leakage and abnormal noise, significantly improving the engine's combustion efficiency and durability.

It strictly matches the intake and exhaust interfaces, lubricating oil circuit and cooling system parameters of the 4HK1 engine, using original special gaskets and bolts. The installation torque is operated according to the standard of 35-40N·m, enabling quick replacement without additional modification. With the help of special tools, the assembly replacement can be completed in 3-4 hours, which greatly shortens the downtime. Its efficient supercharging can reduce the engine's fuel consumption by 8%-10%, reduce harmful gas emissions, and at the same time reduce the engine's mechanical load, extend the service life of core components such as the cylinder block and piston, lower the overall comprehensive maintenance cost of the whole machine, and improve the operational economy and stability of the equipment.