Heavy Duty Equipment Technician Red Seal Exam Prep · Question
An oil analysis report for a wheel loader's transmission indicates a significant increase in copper (Cu) and lead (Pb) while other wear metals remain stable. The machine uses a common transmission fluid. What specific type of wear does this combination most strongly suggest?
Copper and lead are primary components of journal bearings and sleeve bearings commonly found in transmissions. An increase in both suggests wear in these beari
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Question: An oil analysis report for a wheel loader's transmission indicates a significant increase in copper (Cu) and lead (Pb) while other wear metals remain stable. The machine uses a common transmission fluid. What specific type of wear does this combination most strongly suggest?
Answer options: ✅ Bearing material wear.
- Gear tooth pitting.
- Clutch disc degradation.
- Seal material breakdown.
Correct answer: Bearing material wear.
Explanation: Copper and lead are primary components of journal bearings and sleeve bearings commonly found in transmissions. An increase in both suggests wear in these bearing surfaces, often due to lubrication issues or excessive loading, rather than gears or clutches.
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