Heavy Duty Equipment Technician Red Seal Exam Prep · Question
When refilling a hydraulic steering system on a loader, if the specified fluid is not available, which action is MOST appropriate according to best practices and manufacturer guidelines?
Using an incorrect hydraulic fluid can lead to seal degradation, pump cavitation, accelerated wear, and system failure due to incompatibility with additives or
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Question: When refilling a hydraulic steering system on a loader, if the specified fluid is not available, which action is MOST appropriate according to best practices and manufacturer guidelines?
Answer options: ✅ Delay the job until the correct manufacturer-specified fluid arrives.
- Substitute with a readily available universal hydraulic fluid labelled 'suitable for all systems'.
- Mix two different types of hydraulic fluid if they are both ISO VG 46.
- Use engine oil (SAE 30) temporarily, as it has similar viscosity.
Correct answer: Delay the job until the correct manufacturer-specified fluid arrives.
Explanation: Using an incorrect hydraulic fluid can lead to seal degradation, pump cavitation, accelerated wear, and system failure due to incompatibility with additives or base oils. Always follow manufacturer specifications and CCOHS guidelines for fluid compatibility.
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