Volvo VAH 2013, Operator'S Manual, Page: 133 / 175

Operator's Manual Vehicle Maintenance
VN, VHD 129
Tire Inflation and Wear
WARNING
DO NOT operate the vehicle with under-inflated tires. Always keep your tires
inflated to the manufacturers recommendation. Increased flexing in the tire sidewall
produces heat. The heat can build to the point of blowing the tire out causing an
accident.
WARNING
Check tire pressure when the tire is cool. Never bleed the air from hot tires.
Increased tire pressure measured in a hot tire is normal. Low pressures may cause
side wall flexing, resulting in increased heat, leading to tire failure and vehicle
accident.
Remove stones lodged in ribs or in between double-mounted wheels. Check the tire
pressure and leak-test the valve stems.
W7001270
Measure the tread depth. The depth should not be less than 4.8 mm (6/32-in) on front
tires and not less than 1.6 mm (2/32-in) on drive tires. Most premium steer tires start
with 14.2 mm (18/32-in) tread depth when new. Usually remove steer tires at 4.8 mm
(6/32-in). Drive tires should be removed at not less than 1.58 mm (2/32-in).
It is important to have the wheels correctly aligned. Check for uneven tire wear
frequently. Uneven tire wear is a sign of wheels out of alignment.