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Nov 1, 2003 12:00 PM

Peterbilt trucks ordered with the Dana Spicer Tire Pressure Control System (TPCS) will now feature an enhanced four-channel version, according to Peterbilt Motors Co.

The TPCS allows operators to increase and decrease air pressure in the tires using an in-dash console, thus adjusting traction to best meet application and surface conditions. The new four-channel system provides each tire with an independent inflation/deflation valve, so loss of air to one of the drive tires — such as in a tire puncture — will not disable the vehicle.

Operators can adjust tire pressure for loaded and unloaded applications, as well as for on-highway, off-highway, and emergency surface conditions — a total of six settings. When the vehicle returns to normal paved road speeds, TPCS automatically increases tire pressure to prevent excessive tire wear.

Reducing tire pressure increases surface contact between tires and terrain. Lower tire pressure also lessens the chances of tire damage from a sharp object, and minimizes damage to terrain. As tire pressure decreases, so does shock load and vibrations, improving operator comfort.

TPCS is available for Peterbilt's Model 357.