Group 22, Wheels and Tires
SM 765, Nov ’06 Wheels and Tires Specifications and Description • 22-1-1
Specifications
Steer Tire Types : Pneumatic rubber/Cushion rubber, non-
marking, and urethane.
Drive Tire Types : Pneumatic rubber/Cushion rubber, non-
marking, and urethane.
Pneumatic Drive and Steer Tire Inflation Pressure :
Drive GEX20/25/30: 800 kPa (116psi)
Steer GEX20/25/30: 1000 kPa (145psi)
Fastener Torques
Steer Tire Mounting Nut Torque : Check mounting proce-
dure in Sections 2 and 3 for cushion and pneumatic tires
and wheels.
Drive Wheel Mounting Nut Torques :
1 Piece (black) 155-180 N
⋅m (114-133 lb⋅ft)
Service Intervals
Wheel Mounting Bolts Check and Tightening : Every 50-
250 hours of operation and each PM.
Tire Condition : Daily inspection.
Tire Pressure Check : Daily inspection.
Description
The wheels and tires used on the truck come in pneumatic
or cushion types in a variety of sizes depending on truck
model and application. Pneumatic tires are mounted on
multi-piece rims with locking rings.
WARNING
!
For your safety and the safety of others,
before you do tire or rim maintenance or ser-
vice, read the OSHA rules regarding owner
responsibility. Do not work on tires or rims
unless you have been trained in the correct
procedures. Read and understand all mainte-
nance and repair procedures on tires and
rims. Serious injury or death can result if
safety messages are ignored.
The Occupational Safety and Health Act (OSHA) speci-
fies required procedures for servicing multi-piece rim
wheels in 29 CFR Section 1910.177. It is the owner’s
responsibility to comply with OSHA.
In accordance with OSHA, the owner must provide a
training program to train and instruct all employees who
service multi-piece rim wheels in the hazards involved
and the safety procedures to be followed. Do not let any-
one mount, demount, or service multi-piece rim wheels
without correct training.
The owner should obtain and maintain in the service area
current copies of the United States Department of Trans-
portation, National Highway Traffic Safety Administra-
tion publications entitled “Safety Precautions for Mount-
ing and Demounting Tube-Type Truck/Bus Tires,” and
Multi-Piece Rim/Wheel Matching Chart” or other similar
publications applicable to the types of multi-piece rim
wheels being serviced.
Section 1
Wheels and Tires Specifications and Description
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