Paccar PX-9 Operator's Manual - page 52
OPERATING INSTRUCTIONS
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.
WARNING!
DO NOT drive with frequent or con-
tinuous use of the service brakes.
This can overheat the brakes and
result in excessive lining wear, in-
creased stopping distances, pos-
sibly an accident and may lead to
personal injury. Before descend-
ing a steep grade, shift to a lower
gear, keep the vehicle speed low,
and avoid continuous application
to the brakes. Failure to comply
may result in death, personal in-
jury, equipment or property dam-
age.
NOTE
The longer or steeper the hill, the
more important it is to use your en-
gine brakes. Make maximum use
of your engine brakes by gearing
down and letting the engine brakes
do the work.
If frequent use of the vehicle service
brakes is required, it is recommended
that a slower control speed be used by
selecting a lower transmission gear.
4-16
Y53-1185-1B1
(12/2014)
4