DASH- AND DOOR-MOUNTED FEATURES CONTROLS AND DISPLAY
– 54 – Y53-6033
Regional Haul (R05/10)
Air Suspension Deflate Switch (Dump Valve)
Your Peterbilt vehicle may have an air suspension defla-
tion 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 pre-
vents 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 mov-
ing.
CAUTION: Operating a vehicle with air suspen-
sion bags either overinflated or underinflated
may cause damage to driveline components. If a
vehicle must be operated under such condi-
tions, do not exceed 5 mph.
Cruise Control Switch
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.
AIR SUSPENSION
