Excavator Operator Certification Exam Prep · Question
When inspecting the slew bearing during a circle-check, what specific signs indicate potential issues that require further investigation?
Excessive grease expulsion, unusual resistance during rotation, or grinding noises are direct indicators of potential slew bearing damage or wear, requiring imm
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Question: When inspecting the slew bearing during a circle-check, what specific signs indicate potential issues that require further investigation?
Answer options: ✅ Excessive grease expulsion, unusual resistance, or grinding noises during rotation.
- Minor surface rust on the slew bearing housing and mounting bolts.
- A faint, rhythmic clicking sound when the machine is stationary.
- Slight discoloration of the slew ring's external paint finish.
Correct answer: Excessive grease expulsion, unusual resistance, or grinding noises during rotation.
Explanation: Excessive grease expulsion, unusual resistance during rotation, or grinding noises are direct indicators of potential slew bearing damage or wear, requiring immediate investigation. Minor surface rust, a faint clicking sound when stationary, or slight paint discoloration are typically not critical indicators of a compromised slew bearing in a pre-operational check.
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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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