operators_manual

• The vehicle is used to haul double
or triple trailer combinations.
• If very rapidly winding steering
inputs are inputted at high speeds.
• 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 to
cause significant side forces on the
vehicle and any towed vehicles.
To maximize the effectiveness of ESC:
• 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:
• The vehicle hauls loads that
could shift
• The vehicle or load has a high
or offset center of gravity (CG)
when loaded
• The vehicle tows doubles or
triples
The ESC 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
ESC system must be disabled immediately
by a qualified mechanic.
WARNING
Failure to disable ESC "Electronic Sta-
bility Control" when modifying a vehi-
cle could result in a loss of vehicle
control possibly resulting in an acci-
dent involving death or personal injury.
WARNING
For vehicles equipped with ESC" Elec-
tronic Stability Control" do not replace
the vehicle’s steering wheel with an af-
termarket or different part number than
originally supplied. Using a different
steering wheel could cause ESC to
malfunction causing a loss of vehicle
control possibly resulting in an acci-
dent involving death or personal injury.
Whenever maintenance or repair work is
performed to the steering mechanism,
linkage, gear, adjustment of the wheel
track, or if the steering angle sensor is
replaced or the steering wheel is changed
or re-centered, the Steering Angle Sensor
must be re-calibrated.
WARNING
If the Steering Angle Sensor is not re-
calibrated, the Yaw Control system will
not function properly. An uncalibrated
sensor could result in a loss of control
of your vehicle which can lead to an
accident involving death or personal
injury.
Retarders
Various retarders are available, which
function against the engine, driveline, or
transmission. These are devices that use
your engine’s power to slow down your
DRIVING - Brakes
168 Y53-6126-1A1 (01/21)
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