Anti-Lock Braking Systems - Detroit Diesel DD15 EuroIV Operator's Manual

Engine Brake System
Engine Brake Operation
NOTICE: Always allow the engine to reach full normal operating
temperature before activating the engine brake system to ensure positive
engine brake engagement.
The engine brake system depends on a full-pressure flow of warm engine
lubricating oil for proper lubrication of moving parts and optimum performance.
The minimum operating speed for the engine brake is 900 rpm. A check engine
lamp will be illuminated when the operating speed exceeds 2200 to 2300 rpm
depending on engine configuration.
NOTICE: Never exceed 2500 rpm or extensive engine damage can occur.
CAUTION: LOSS OF VEHICLE CONTROL
To avoid injury from loss of vehicle control, do not activate the
Engine Brake system under the following conditions:
• On wet or slippery pavement, unless the vehicle is equipped
with ABS (anti-lock braking system) and you have had prior
experience driving under these conditions.
• When driving without a trailer (bobtailing) or pulling an empty
trailer.
• If the tractor drive wheels begin to lock or there is fishtail
motion after the Engine Brake is activated, deactivate the brake
system immediately if this occurs.
Under normal driving conditions the engine brake system is left in the ON position.
However, this should change if roads become wet or slippery.
NOTICE: Do not attempt to "double clutch" the transmission while the
engine brake system is turned on. Shifting gears without pressing the clutch
or using the engine brake to reduce engine rpm may result in serious
powertrain damage.
After it is switched on, the engine brake system is automatically activated each time
you remove your feet completely from the clutch pedal and accelerator pedal. The
engine brake automatically deactivates itself when you press the clutch pedal while
shifting gears.
NOTE: Some systems may be programmed to activate themselves only
when the brake pedal is pressed, so read your vehicle owner's manual
thoroughly to find out if you have this option.
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All information subject to change without notice.