Peterbilt 579 Operator's Manual page 200

OPERATING THE BRAKE SYSTEM
•
There are mechanical problems
with suspension leveling of the
tractor or trailer resulting in uneven
loads.
•
The vehicle is maneuvering on a
high banked road creating either
additional side forces due to the
weight (mass) of the vehicle or a
deviation between expected and
actual yaw rates.
•
Gusty winds are strong enough
4
to cause significant side forces
on the vehicle and any towed
vehicles.
4-28
To Maximize the Effectiveness of
ESP
•
Loads must be properly secured
and evenly distributed at all times.
•
Drivers need to exercise extreme
caution at all times, and avoid
sharp turns, sudden steering
inputs or abrupt lane changes at
high speeds, particularly if:
a. the vehicle hauls loads that
could shift,
b. the vehicle or load has a high
or off-set center of gravity
(CG) when loaded, or
c. the vehicle tows doubles or
triples.
Y53-6047–2C
Truck Chassis Modifications
The ESP system was specifically
calibrated and validated only for
your vehicle's original factory-built
configuration. If your vehicle's chassis
components are altered (for example;
a wheelbase extension or reduction,
tag axle addition or removal, tractor to
truck conversion or steering system
component change) the ESP system
must be disabled immediately by a
qualified mechanic.
WARNING!
Failure to disable ESP "Electronic Sta-
bility Program" when modifying a vehi-
cle could result in a loss of vehicle con-
trol possibly resulting in an accident in-
volving death or personal injury.
(04/13)