operators_manual

To reduce vehicle speed, put the engine
brake ON/OFF switch in the "ON" position.
Remove your foot from the accelerator
pedal and clutch pedal. The engine brakes
will immediately begin to operate, slowing
the vehicle.
For operation on dry and relatively flat
surfaces, when greater retarding power is
not required, put the two-position selector
switch in the "LOW" position.
For operation on dry pavement when
maximum retarding power is required, put
the three-position selector switch in the
"HI" position.
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 op-
erating 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.
ENGINE OPERATION - Operating Instructions
24 Y53-1166-1G1 (08/2018)
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