Heavy Duty Equipment Technician Red Seal Exam Prep · Question
A maintenance schedule for a hydraulic excavator specifies replacement of filter elements every 250 operating hours or three months, whichever comes first. The machine has operated for 200 hours in the last two months. When should the filters be replaced?
Maintenance schedules are typically 'whichever comes first' to ensure components are replaced before they operate beyond their designed lifespan, even if the ho
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Question: A maintenance schedule for a hydraulic excavator specifies replacement of filter elements every 250 operating hours or three months, whichever comes first. The machine has operated for 200 hours in the last two months. When should the filters be replaced?
Answer options: ✅ At the three-month mark.
- Immediately at 200 hours.
- At the 250-hour mark.
- Only when the filter restriction indicator illuminates.
Correct answer: At the three-month mark.
Explanation: Maintenance schedules are typically 'whichever comes first' to ensure components are replaced before they operate beyond their designed lifespan, even if the hour threshold hasn't been met.
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