When is the appropriate time to check the excavator transmission fluid?

Checking the excavator transmission fluid at the appropriate times, specifically when the transmission is cold or hot as outlined by the manufacturer's specifications, is crucial for ensuring optimal machine performance and longevity. Manufacturers often provide specific guidelines regarding the correct fluid levels for different temperatures because viscosity can change with temperature fluctuations.

When checking fluid levels according to the manufacturer's specifications, you can ensure that the transmission fluid is neither overfilled nor underfilled, both of which can lead to operational problems. This practice allows for accurate readings that reflect the actual operating conditions of the excavator. Consistent checks also help in identifying potential leaks or fluid degradation early, thus preventing costly repairs and downtime.

The other options do not align with best practices for maintenance. Checking only when the machine is running does not allow for an accurate assessment of fluid levels, while random checks do not follow a systematic approach, potentially leading to missed issues. Checking fluid levels before starting the engine can provide a quick visual inspection, but it might not account for thermal expansion of the fluid or provide a complete picture of the transmission’s status.