Heavy Duty Equipment Technician Red Seal Exam Prep · Question
A differential lock mechanism is engaged on a grader operating on muddy terrain. What is the primary purpose of engaging the differential lock in this scenario?
The differential lock mechanically couples the two output shafts of the differential, forcing both wheels to rotate at the same speed. This prevents power from
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Question: A differential lock mechanism is engaged on a grader operating on muddy terrain. What is the primary purpose of engaging the differential lock in this scenario?
Answer options:
- To increase steering response.
- To reduce wear on the tires. ✅ To ensure both drive wheels rotate at the same speed, maximizing traction.
- To improve fuel economy by distributing power more evenly.
Correct answer: To ensure both drive wheels rotate at the same speed, maximizing traction.
Explanation: The differential lock mechanically couples the two output shafts of the differential, forcing both wheels to rotate at the same speed. This prevents power from being entirely sent to a wheel with no traction (spinning), ensuring both receive power to maximize traction on slippery or uneven terrain, as per OEM operational guidelines.
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