operators_manual

Engine Brake Operation for a
Vehicle with Automated
Transmission
Moving the lever clockwise will engage the
engine brake. Increase the amount of
engine brake by moving the lever further
clockwise. Each position has a
corresponding level of engine brake.
Position Amount of Engine Brake
Off 0 %
1 33%
Position Amount of Engine Brake
2 66%
3 100%
4* 100% AND will engage
transmission low gear
* This position is momentary
and will revert back to position
3 when the lever is released.
The corresponding engine brake level (or
MAX mode) will be illuminated in the
instrument cluster.
Related tasks
How to Activate MAX Mode
Vehicles with PACCAR automated or
Eaton Endurant transmsission have a MAX
mode. Use this operation when the
situation requires 100% eninge brake and
additional resistance from using the low
gear of the transmission.
1. Move the Transmission Shifter to
the 3rd position, representing
100% engine brake.
2. Pull the Transmission Shifter
down once more and allow the
shifter to move back up to the
previous location
MAX mode is now active and the
instrument display will show the indicator in
the view.
How to Deactivate MAX Mode
Vehicles with automated transmissions will
have the engine brake function integrated
with the transmission controls. Follow
these steps to deactivate MAX engine
brake mode.
1. Accelerate with the throttle pedal.
2. Upshift,Up or Down Shifting on
page 157 see .
3. Wait for the transmission coast
down gear to engage.
4. Reduce engine brake level.
5. Re-initiate MAX mode.
6. Select Neutral N, see Drive Neutral
Reverse Selector on page 158.
7. Select LOW mode.
DRIVING - Engine Operations
Y53-6126-1A1 (01/21) 137
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