A technician is performing scheduled maintenance on an off-road haul truck tire. The tire has a placard indicating a cold inflation pressure of 690 kPa (100 psi). The ambient temperature is 20°C. After inflating the tire, the technician measures the pressure at 710 kPa (103 psi) before the first run cycle. What is the appropriate action?

Question: A technician is performing scheduled maintenance on an off-road haul truck tire. The tire has a placard indicating a cold inflation pressure of 690 kPa (100 psi). The ambient temperature is 20°C. After inflating the tire, the technician measures the pressure at 710 kPa (103 psi) before the first run cycle. What is the appropriate action?

Answer options:

• Slightly overinflate the tire to compensate for future use.
• Deflate the tire to exactly 690 kPa (100 psi). ✅ Consider the pressure acceptable as it is within a small tolerance of the recommended cold pressure.
• Inflate the tire to 758 kPa (110 psi) to ensure it reaches optimal working pressure.

Correct answer: Consider the pressure acceptable as it is within a small tolerance of the recommended cold pressure.

Explanation: A small deviation of 20 kPa (3 psi) from the recommended cold inflation pressure is generally considered acceptable for large off-road tires, as long as it's not significantly underinflated. Precision to the exact psi is difficult to maintain in field conditions and minor fluctuations are normal.