During your pre-shift circle check, you notice that the excavator's hydraulic oil tank sight glass shows the oil level well below the lower operating limit. The machine was working hard the previous day.

Question: During your pre-shift circle check, you notice that the excavator's hydraulic oil tank sight glass shows the oil level well below the lower operating limit. The machine was working hard the previous day.

Answer options: ✅ Add the manufacturer-specified hydraulic fluid until the level is within the operating range, then check for external leaks.

• Operate the machine for a short period to see if the oil level stabilizes.
• Assume the previous operator drained some oil and continue operation.
• Top up with any available engine oil, as it's a temporary fix.

Correct answer: Add the manufacturer-specified hydraulic fluid until the level is within the operating range, then check for external leaks.

Explanation: Operating with an insufficient hydraulic fluid level can lead to cavitation, overheating, pump damage, and system malfunction. The correct action is to add the specified hydraulic fluid to the appropriate level and then investigate for potential leaks, as a low level often indicates a leak. Using incorrect fluid or operating with low levels can cause severe damage.