OPERATION
5-62 / Driving the Vehicle
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• On trucks equipped with Command Zone™ D-Series modules (Arrow XT™, Impel™, Quantum®, Velocity™,
Dash® CF, Enforcer™):
— The tire chains will activate instantly if the parking brake is set and the switch is activated.
— If the parking brake is released, the switch must be held for two seconds before the tire chains will activate
(to prevent accidental activation).
• Engage automatic chains before reaching slippery conditions.
• Engage automatic chains while traveling at vehicle speeds between 2 and 25 mph.
• Vehicle can be stopped and started again as long as the control switch remains in the engaged position.
• Disengage automatic chains while traveling at vehicle speeds between 2 and 35 mph.
• To engage chains when the vehicle is already stuck, spin tires up to 5 mph and engage chains. Stop spinning
the tires and proceed slowly once the action of the chains is apparent.
Refer to the chain system manufacturer’s instructions for maintenance and service requirements.
5-34. Tire Pressure Management System
5-34.1 Tire Pressure Management (Standard)
NOTE: The tire must be inflated to the correct pressure before installing the tire sensor valve cap to
calibrate and ensure proper operation.
Your apparatus is equipped with a LED Air Guard™ tire alert pressure management system that will monitor the
pressure of each tire. The LED Air Guard™ valve cap is a chrome plated brass sensor that is installed on the valve
stem of each tire. This sensor will calibrate to the tire pressure when first installed on the valve stem.
The sensor can be checked for functionality and battery condition by simply unscrewing the cap. If it is in working
condition, the LED will immediately start blinking. The sensor will activate an integral battery operated LED when
the pressure of that tire drops 8 psi.
See “LED Air Guard Tire Pressure Monitoring System”, Group 0670-V-003 in the vehicle Service Manual for more
information.
5-34.2 Tire Pressure Management (Optional)
Your apparatus may be equipped with a SMARTIRE tire pressure management system that will monitor each tires
pressure and temperature. A 2.00" gauge located in the cab instrument panel will indicate each tires position,
pressure and temperature. An alarm will sound when the tire pressure deviates 10% or more. A wireless sensor is
mounted to each wheel.
The system has three (3) alert levels:
• Critical Low Pressure Alert
• Pressure Deviation Alert
• High Temperature Alert
Each alert will trigger an audible alarm and an indicator light within the gauge to signal the driver of the problem.
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