Telehandler Operator Certification Exam Prep · Question
A telehandler's hydraulic cylinder for the frame levelling system drifts significantly after being adjusted. The operator notices that the drift occurs even when no load is being handled. What is the most probable cause?
Drifting in a hydraulic cylinder, especially without external leaks, is a classic symptom of internal leakage, either past the piston seals within the cylinder
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Question: A telehandler's hydraulic cylinder for the frame levelling system drifts significantly after being adjusted. The operator notices that the drift occurs even when no load is being handled. What is the most probable cause?
Answer options: ✅ Internal leakage within the levelling cylinder or its control valve.
- Insufficient hydraulic fluid in the reservoir.
- A clogged hydraulic return line filter.
- The boom extend cylinder is leaking externally.
Correct answer: Internal leakage within the levelling cylinder or its control valve.
Explanation: Drifting in a hydraulic cylinder, especially without external leaks, is a classic symptom of internal leakage, either past the piston seals within the cylinder or through its control valve. Insufficient fluid or a clogged return filter would likely affect multiple functions or cause overheating, and an external boom leak would not explain frame levelling drift.
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