Peterbilt Medium Duty Truck Owner's Manual - Peterbilt Motors

Peterbilt Medium Duty Truck Owner's Manual - Peterbilt Motors Peterbilt Medium Duty Truck Owner's Manual - Peterbilt Motors

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DASH- AND DOOR-MOUNTED FEATURES Fog Lights Switch CONTROLS AND DISPLAY Air Suspension Deflate Switch (Dump Valve) AIR SUSPENSION If your vehicle has fog lights, turn them ON or OFF with the control panel switch with the symbol shown above. NOTE: Across the U.S.A. and Canada, State/Provincial requirements vary as to when high beams and fog lights can and cannot be used together. Some states allow only four lights to be used together, while some allow more. How your lights are arranged will affect whether you can operate headlights and fog lights concurrently—always comply with the state or provincial requirements where you are driving. Your Peterbilt vehicle may have an air suspension deflation switch which allows the air in the suspension to be exhausted from a switch on the dash. The purpose of this feature is to allow you to lower your tractor to get under a trailer. You may notice a guard over the switch. This prevents you from accidentally deflating the suspension. WARNING! Operating the Air Suspension Deflate Switch (Dump Valve) while driving can lead to an accident causing death or personal injury. Sudden deflation while your vehicle is moving can affect handling and control. Use this switch only when your vehicle is not moving. – 54 – Y53-6027 Medium Duty (R05/09)

CONTROLS AND DISPLAY CAUTION: Operating a vehicle with air suspension bags either overinflated or underinflated may cause damage to driveline components. If a vehicle must be operated under such conditions, do not exceed 5 mph. Cruise Control Switch DASH- AND DOOR-MOUNTED FEATURES WARNING! Do not operate the cruise control when operating on road surfaces with poor traction (wet, icy, or snow covered roads) or in heavy traffic. Accelerations caused by the normal operation of the cruise control could cause you to lose control of the vehicle resulting in an accident causing death or personal injury. NOTE: Cruise control functions and features may vary depending upon which engine you have. For specific explanation of your cruise control, see the cruise control or engine manual included with your vehicle. The master switch turns the cruise control ON or OFF. The second switch allows you to SET the desired speed or RESUME the desired speed after the cruise control function has been interrupted. This vehicle’s electronic system will perform a ‘rationality check’ every time the vehicle is started. This check is to ensure that the service brakes are working before allowing cruise control to function. This safety feature is Medium Duty (R05/09) Y53-6027 – 55 –

CONTROLS AND DISPLAY<br />

CAUTION: Operating a vehicle with air suspension<br />

bags either overinflated or underinflated<br />

may cause damage to driveline components. If a<br />

vehicle must be operated under such conditions,<br />

do not exceed 5 mph.<br />

Cruise Control Switch<br />

DASH- AND DOOR-MOUNTED FEATURES<br />

WARNING! Do not operate the cruise control<br />

when operating on road surfaces with poor<br />

traction (wet, icy, or snow covered roads) or in<br />

heavy traffic. Accelerations caused by the<br />

normal operation of the cruise control could<br />

cause you to lose control of the vehicle resulting<br />

in an accident causing death or personal<br />

injury.<br />

NOTE: Cruise control functions and features may<br />

vary depending upon which engine you have. For<br />

specific explanation of your cruise control, see<br />

the cruise control or engine manual included with<br />

your vehicle.<br />

The master switch turns the cruise control ON or OFF.<br />

The second switch allows you to SET the desired speed<br />

or RESUME the desired speed after the cruise control<br />

function has been interrupted.<br />

This vehicle’s electronic system will perform a ‘rationality<br />

check’ every time the vehicle is started. This check is to<br />

ensure that the service brakes are working before allowing<br />

cruise control to function. This safety feature is<br />

<strong>Medium</strong> <strong>Duty</strong> (R05/09) Y53-6027 – 55 –

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