8-97362-839-0 Turbocharger for Hitachi ZX230 and ZX240-3 Excavators

8973628390 RHF55 Turbocharger Overview

The 8973628390 RHF55 turbocharger, also identified by the Isuzu-format number 8-97362-839-0, is used with Isuzu 4HK1 diesel engine applications in selected Hitachi ZX-series excavators. It supplies compressed intake air to support engine combustion and boost performance under working load.

This turbocharger may be considered when the existing unit shows oil leakage, abnormal shaft noise, unstable boost pressure, excessive shaft clearance or damaged compressor and turbine components. The cause of the original failure should be identified before installing a new unit.

Part Identification Before Replacement

Before ordering, compare the old turbocharger number, RHF55 identification, engine model, compressor housing, turbine housing, mounting flange, oil inlet, oil return connection and outlet direction. Machine model alone may not be sufficient because turbocharger configurations can vary by engine arrangement and previous repair history.

Clear photos of the old turbocharger tag and both housing sides are recommended when the original number cannot be read completely.

Checks Before Installation

Inspect the air filter, intake hoses, exhaust manifold, oil feed pipe and oil return pipe before fitting the 8973628390 turbocharger. Restricted airflow, contaminated oil, blocked oil return or foreign material entering the compressor can cause repeated turbocharger damage.

Use clean engine oil to lubricate the turbocharger before the first start. After installation, inspect for oil leakage, abnormal noise, black or blue smoke and unstable boost response.

FAQ

How can I confirm whether 8973628390 fits my excavator?

Check the old turbocharger number, RHF55 identification, Isuzu 4HK1 engine model and housing configuration. Please provide the machine model, engine plate and old turbocharger photos when additional confirmation is needed.

Can fitment be confirmed by the 4HK1 engine model alone?

No. Different 4HK1 engine arrangements may use different housings, flanges and connection directions. The old turbocharger number and physical configuration should also be compared.

What should be checked before installing the new turbocharger?

Check the oil feed and return pipes, air filter, intake system and exhaust manifold. Any blockage, contamination or foreign material should be corrected before installation.

What is the warranty for this turbocharger?

The standard warranty is 6 months. Installation conditions and the cause of the previous turbocharger failure should be checked before replacement.