Loader Operator Certification Exam Prep · Question
An operator reports that their wheel loader is exhibiting reduced lift and tilt power in the bucket, especially when under load, and the hydraulic fluid appears foamy. The engine RPMs sound normal. What is the primary cause of this issue?
Foamy hydraulic fluid, combined with reduced power, is a classic symptom of air entering the hydraulic system. Air in the hydraulic fluid compresses, leading to
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Question: An operator reports that their wheel loader is exhibiting reduced lift and tilt power in the bucket, especially when under load, and the hydraulic fluid appears foamy. The engine RPMs sound normal. What is the primary cause of this issue?
Answer options: ✅ Air ingress into the hydraulic system.
- Overheating hydraulic fluid.
- A worn or damaged hydraulic pump.
- Clogged hydraulic return line filter.
Correct answer: Air ingress into the hydraulic system.
Explanation: Foamy hydraulic fluid, combined with reduced power, is a classic symptom of air entering the hydraulic system. Air in the hydraulic fluid compresses, leading to spongy or reduced power, and can cause foaming. While other issues can cause reduced power, the foaming points directly to air.
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Question explanations
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