RAM 2013 CHASSIS CAB 3500 Owner's Manual page 320

318 STARTING AND OPERATING
Tire Inflation Pressure – 4500/5500 With Steel
Carcass Ply Tires
This type of tire utilizes steel cords in the sidewall. As
such, they cannot be treated like normal light truck tires.
Adjusting tire pressure must be performed by personnel
trained, supervised and equipped accordingly.
Inflation Pressure Adjustment When Mounted To
Vehicle
During procedures when adding tire inflation pressure,
the technician or individual must utilize a remote infla-
tion device, and ensure that all persons are clear of the
trajectory area.