Heavy Duty Equipment Technician Red Seal Exam Prep · Question
While operating a dozer on an uneven construction site, the operator feels a constant 'crabbing' or pulling sensation even on level ground after disengaging the differential lock. What is the most probable cause?
A 'crabbing' or pulling sensation, especially after disengaging the differential lock, strongly suggests that the differential lock has not fully disengaged. Th
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Question: While operating a dozer on an uneven construction site, the operator feels a constant 'crabbing' or pulling sensation even on level ground after disengaging the differential lock. What is the most probable cause?
Answer options: ✅ The differential lock remains partially engaged or stuck
- Over-inflated tires on one side of the machine
- A low fluid level in the steering hydraulic system
- Worn track pins and bushings
Correct answer: The differential lock remains partially engaged or stuck
Explanation: A 'crabbing' or pulling sensation, especially after disengaging the differential lock, strongly suggests that the differential lock has not fully disengaged. This would cause the axles to still try and rotate at the same speed, leading to tire scrubbing and the sensation described.
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