Excavator Operator Certification Exam Prep · Question
An excavator's hydraulic system suddenly loses power and becomes sluggish, despite the engine running at normal RPM. What is the most likely initial cause to investigate?
Loss of hydraulic power often points to issues with the hydraulic fluid supply or the pump itself. Low fluid levels starve the system, while a failing pump cann
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Question: An excavator's hydraulic system suddenly loses power and becomes sluggish, despite the engine running at normal RPM. What is the most likely initial cause to investigate?
Answer options:
- A clogged air filter. ✅ Low hydraulic oil level or a failing hydraulic pump.
- Malfunctioning cab climate control.
- Over-inflated tires on the undercarriage.
Correct answer: Low hydraulic oil level or a failing hydraulic pump.
Explanation: Loss of hydraulic power often points to issues with the hydraulic fluid supply or the pump itself. Low fluid levels starve the system, while a failing pump cannot generate adequate pressure.
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Question explanations
- During a final inspection of an excavator, prior to beginning work, an operator notices significant play in th
- An excavator operator is preparing to dig a trench in cohesive soil. To achieve maximum breakout force, what a
- Which control typically governs the arm (or dipper arm) movement for an excavator?
- What condition might require sloping or shoring of a trench less than 1.2 meters (4 feet) deep?
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