Tire Pressure Control System (If Equipped); Operating The Dana Tire Pressure Control System - Mack Granite GU Series Operator's Handbook Manual

TIRE PRESSURE CONTROL SYSTEM (IF
EQUIPPED)
The Dana® Tire Pressure Control System (TPCS) is an incredibly simple
system to operate. All commands to adjust tire pressures are controlled by
the driver from an easy-to-use operator control panel located in the overhead
compartment above the driver. The driver simply selects the desired mode
with the touch of a button and the Dana TPCS does the rest, adjusting tire
pressures to match the road surface. Indicators on the control panel tell the
driver what's happening.
A built-in indicator warns the driver when he is traveling too fast for selected
tire pressures, and the system logic automatically selects the appropriate
pressure if the speed is not reduced. A warning icon also tells the driver
to check his tires if the system senses conditions which may indicate tire
damage. A pressure switch acts as an electronic brake priority switch to
prevent the Dana TPCS from using air until the brake system is fully charged.
Brakes always have priority.
With its two modes of operation (Loaded/Unloaded) and three terrain settings,
you get six pressures from which to effectively operate across a wide variety of
terrain. "Highway" mode allows for high speed travel on paved surfaces, "Off
Highway" permits operation on secondary roads, and "Emergency" provides
extremely low tire pressures to help free a stuck vehicle, or take on grades that
previously were impossible to negotiate without assistance. Plus, the Dana
TPCS has various digital display codes that report when a problem exists, and
exactly what the problem is so you know just what to do to correct the situation.
The Dana TPCS requires a constant supply of clean dry air. An adequately
sized and maintained air dryer is critical for continued proper operation of the
Tire Pressure Control System. Even though the air dryer may be working
properly, moisture can accumulate in the wet tank during normal operation
due to the increase in air consumption. It is important to drain the wet tank
daily. Draining the wet tank completely (to 0 pressure) when the truck is not in
use will help keep moisture under control.

Operating the Dana Tire Pressure Control System

The Operator Control Panel (OCP) is the sole interface for display of operator
information and for key entry of the system instructions. The following sections
explain the purpose and operation of all OCP features.
OPERATION 141