Volvo D11F - Manual (Page 87)

Maintenance and Service 83
DO NOT install tires with a load rating that is less than stated on the
Certification Label in the door frame. The tire could be unintentionally
overloaded, leading to an accident, causing serious personal injury or death.
DO NOT use mismatched tires on the same axle. Always use the same type
(radial or bias ply) or size. Mixing tires on the same axle will affect the
roadholding and can lead to an accident, and serious personal injury or
death.
Wheels
Before checking the wheels, set the parking brakes, place the transmission
in neutral and chock the wheels. Failure to do so can result in unexpected
vehicle movement and can cause serious personal injury or death.
Wheels must be serviced only by a qualified technician. DO NOT do this
work yourself. Inflated tires on wheels contain compressed air and if
suddenly released, do so with an explosive force, resulting in serious
personal injury or death.
Check wheels for signs of rust streaks around the wheel nuts. This indicates
looseness (steel rims). Inspect all types of rims for cracks. Cracks can appear
in many places but typically radiate out from where a load is applied. Inspect
closely around wheelnuts, handholes and inside circumference.
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