
PART 4: CONTROLS AND DISPLAYS
DASH-MOUNTED FEATURES
(R05/10)
Y53-6032
– 45 –
• ON (I) Position:
– Press once: Light will turn on at high intensity.
– Press again: Light will shift to low intensity.
– Press a third time: Light will turn off.
Air Suspension Deflate Switch (Dump Valve)
This vehicle may have an air suspension deflation switch
that 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
will 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 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.
03035
Y53-6032.book Page 45 Monday, May 24, 2010 3:37 PM
Summary of Contents for Peterbilt 587
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