operators_manual

Operating on Grades and Dry
Pavement
Tips for driving on grades and dry roads.
WARNING
The engine brake is not intended as
the primary brake for the vehicle, nor
is it an emergency brake. The service
brakes must be used in an emergency.
Relying solely on the engine brake to
stop the vehicle in an emergency
could cause an accident and lead to
personal injury. The engine brake only
helps the service brakes by using
pressure to slow the drive train. You
must use the service brakes for quick
or emergency stops. Failure to comply
may result in death, personal injury,
equipment or property damage.
"Control speed" is the speed at which the
forces pushing a vehicle down a grade are
equal to the forces holding it back.
Do Not Exceed Governed Engine Speed
OK
OK
RPM
2100
2300
1
2
33
4
5
R
RPM
1
2
3
44
5
R
MPH
0
10
20
30
40
50
60
70
80
MPH
0
10
20
30
40
50
60
70
80
WARNING
DO NOT use the engine brake when
operating on road surfaces with poor
traction (such as wet, icy, or snow cov-
ered roads or gravel). Retarders can
cause the wheels to skid on a slippery
surface. You could lose control of the
vehicle and/or jackknife if the wheels
begin to skid, resulting in an accident.
Failure to comply may result in death,
personal injury, equipment or property
damage.
CAUTION
The engine ECM maintains a record of
maximum rpm. Exceeding the maxi-
mum rpm will be considered driver
abuse and will affect the engine war-
ranty. See Engine Spcifications.
WARNING
DO NOT use an exhaust brake when
driving bobtail or with an unloaded
trailer. There may not be enough
weight on the rear axle to provide trac-
tion. This could cause a loss of control
and jackknife resulting in an injury ac-
cident. Make sure the exhaust brake is
switched “OFF” when bobtailing or
with an unloaded trailer. Failure to
comply may result in death, personal
injury, equipment or property damage.
ENGINE OPERATION - Operating Instructions
Y53-1183-1E1 (04/16/18) 29
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