During a routine 250-hour service, a loader operator inspects the air filter restriction indicator on a front-end loader. The indicator is showing a red band and is nearing its maximum limit. The engine performance has seemed normal, and fuel consumption has not noticeably increased. What is the recommended action?

Question: During a routine 250-hour service, a loader operator inspects the air filter restriction indicator on a front-end loader. The indicator is showing a red band and is nearing its maximum limit. The engine performance has seemed normal, and fuel consumption has not noticeably increased. What is the recommended action?

Answer options:

• Clean the air filter element with compressed air to remove accumulated dust. ✅ Replace the primary air filter element and check the safety element for damage.
• Reset the indicator and continue monitoring as engine performance is unaffected.
• Increase engine RPMs for a few minutes to clear any minor obstructions in the filter.

Correct answer: Replace the primary air filter element and check the safety element for damage.

Explanation: When the air filter restriction indicator shows a red band, it signifies that the filter is at or near its maximum capacity for trapping contaminants and must be replaced. Cleaning disposable air filters can damage the filter medium and reduce its effectiveness, allowing contaminants into the engine. The safety element should always be inspected when the primary element is changed.