Heavy Duty Equipment Technician Red Seal Exam Prep · Question
A technician is preparing to demount a large off-road tire from a wheel assembly. What is the most critical safety precaution to take before proceeding with demounting?
Completely deflating the tire and removing the valve core is the most critical safety precaution. This eliminates any residual air pressure that could cause a v
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Question: A technician is preparing to demount a large off-road tire from a wheel assembly. What is the most critical safety precaution to take before proceeding with demounting?
Answer options:
- Ensure the wheel is properly torqued to specifications.
- Inflate the tire to maximum recommended pressure to help break the beads. ✅ Completely deflate the tire and remove the valve core.
- Apply lubricant to the tire bead and wheel flange.
Correct answer: Completely deflate the tire and remove the valve core.
Explanation: Completely deflating the tire and removing the valve core is the most critical safety precaution. This eliminates any residual air pressure that could cause a violent separation of the components, posing a severe hazard to the technician.
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