Hitachi ZW 180-6 Operator's Manual page 314

IMPORTANT: The machine is equipped with a
turbocharged engine. Perform cool down operation
before stopping the engine. Failure to do so may cause
the lubricant on the turbocharger bearing surfaces
to desiccate due to the intense heat present inside
the turbocharger, possibly causing damage to the
turbocharger.
4. Turn the key switch OFF to stop the engine. Leave the
machine untouched for 10 minutes.
5. Prepare a container of more than 50 liters (13 gallons)
capacity to receive the drain oil.
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NOTE: Drain plug (5) is magnetized. If excessive amount of
metal pieces are found adhered to drain plug (5), contact your
authorized dealer.
6. Remove drain plug (5) from the transmission bottom to
drain the oil. Dispose of the drain oil in the proper way.
7. Securely tighten drain plug (5).
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NOTE: Do NOT apply sealant to drain plug (5).
MAINTENANCE
7-42
5
MNEC-07-013