Kenworth T410, Руководство водителя

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Page 180 CAT: 8612 November 2019
OPERATING INSTRUCTIONS
DRIVING BOBTAIL OR WITH AN UNLOADED
TRAILER
The following information is applicable only to truck and trailer configurations.
Do not use the engine retarder (for example engine brake) to slow the
vehicle down when you are bobtail or pulling an empty trailer.
Using engine retarders while bobtailing or with an unloaded trailer can
cause a wheel lock-up resulting in less control and/or a jackknife. The trailer
may not load the rear truck tyres enough to provide necessary traction.
When you are bobtail or unloaded, you can have a serious accident if your
wheels lock suddenly during braking.
ENGINE BRAKES
The service brakes must be used in an emergency. The engine brake
alone might not stop you fast enough to prevent an accident.
Ideally (on normal road surfaces) you should slow your vehicle with the
engine brake (where permitted by law) and use the service brakes only
for stopping completely. Operating this way will greatly prolong the life of
the brakes.
The engine brake is NOT intended as the primary brake for the vehicle,
nor is it an emergency brake. The engine brake only helps the service
brakes by using pressure to slow the drivetrain. Use the service brakes
for quick stops.
Engine brakes create a braking effect on the drive wheels. These devices
use your engine’s power to slow your vehicle down. Because they can help
keep your vehicle’s brakes from overheating, they save wear and tear on
the service brakes. However, the engine brake is not an emergency brake.
Your vehicle may be fitted with a two or three-speed engine brake system
depending the transmission type fitted. Vehicles with a manual transmission
have a two-speed system with LOW and HIGH levels. Vehicles with a
PACCAR or UltraShift PLUS transmission have a three-speed system with
LOW, HIGH and MAX levels. (MAX = HIGH + Down Shift)
MAX level should only be used for steep or long downhill situation not
every day driving.