A single blown tire on a rigid dump truck can cost $10,000 or more — not just the tire itself, but downtime, damaged rims, and potential safety incidents. Most tire failures don’t happen without warning. Here are three often‑ignored checks that keep your mining haul truck tires rolling.
1. Heat Soak After Long Hauls
Tire pressure rises as heat builds. A cold pressure of 110 psi can climb to over 130 psi after an hour of loaded running. Many operators check pressure only when cold — but the real danger is overheating. On long downhill hauls with frequent braking, tire temperatures can spike beyond safe limits.
Train operators to stop and let tires heat soak for 10 minutes after the first loaded run of the shift. Then measure pressure again. If pressure has increased more than 15% over cold inflation, the tire is under‑inflated for the load and speed. Add air when cold next shift.
2. Sidewall “Bulge” and “Bubble” Inspections
Drivers should walk around the truck at every shift change. Look for:
Sidewall bulges – indicate broken cords or impact damage; tire must be removed immediately
Small bubbles – moisture or air between plies; progressive failure likely
Cuts deeper than 10mm – expose cords to grit and moisture
Most mines require a written tire inspection log. A quick photo of each tire weekly can catch changes over time.
3. Valve Cap and Valve Stem Condition
A missing valve cap lets dirt and moisture into the valve core, leading to slow leaks and corrosion. But the bigger issue is valve stem cracking. On heavy mining tires, the rubber valve stem flexes with every revolution. Cracks start at the base. Use a small spray of soapy water around the stem base while the tire is cold. Bubbles mean a leak that will worsen. Replace stems at every tire dismount, not just when they fail.
Bonus:For trucks running more than 5,000 hours per year, consider central tire inflation (CTIS). It lets the operator adjust pressure on the move — low for soft ground, high for haul roads — reducing wear by up to 30%.
Want a printable tire inspection card for your haul truck operators? Reply with your tire size and truck model — we will send a one‑page PDF with pressure charts, tread depth limits, and defect photos for easy reference.
