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Heavy Duty Equipment Technician Red Seal Exam Prep · Question

A heavy equipment operator reports that their articulated dump truck's tires are showing significantly more wear on the outer shoulder compared to the inner shoulder. What is the most likely cause of this specific wear pattern?

Overinflation causes the centre of the tire tread to bulge, placing more pressure on the road surface and leading to accelerated wear in the centre. Underinflat

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Question: A heavy equipment operator reports that their articulated dump truck's tires are showing significantly more wear on the outer shoulder compared to the inner shoulder. What is the most likely cause of this specific wear pattern?

Answer options:

  • Underinflation of the tires. ✅ Overinflation of the tires.
  • Frequent operation on excessively soft ground.
  • Poor wheel alignment (excessive toe-in).

Correct answer: Overinflation of the tires.

Explanation: Overinflation causes the centre of the tire tread to bulge, placing more pressure on the road surface and leading to accelerated wear in the centre. Underinflation typically causes accelerated wear on the outer shoulders of the tire.

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