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The customer contacted us regarding their Hitachi hydraulic excavator “ZX350H-3.” After years of operation, they noticed a decline in engine power and increased black smoke emissions, particularly experiencing symptoms such as “difficulty reaching higher RPMs” during heavy-duty work.

Considering the work efficiency on-site and the load on the engine, a turbocharger (turbine) malfunction was suspected. If operation continued in this condition, there was a risk of worsening fuel consumption and further component damage. In response to the owner’s request to “repair it immediately without stopping work,” we provided our on-site repair service.

The turbine (turbocharger) is a critical component that affects engine performance. If you notice “reduced power” or “increased black smoke,” the turbine malfunction may be the cause. By replacing it promptly as in this case, the machine can regain its original performance and continue stable operation over the long term.

We provide on-site repair services for various hydraulic excavators, including the Hitachi ZX series. Our experienced and skilled staff will visit your site and perform optimal repairs in the shortest time possible. If you have any concerns or questions, please feel free to contact us. Inquiries can be made via phone, email, or direct message. Please take advantage of our services to keep your valuable equipment in optimal condition.