2. Make sure the oil temperature is
cool.
3. Clean around drain plug and
remove plug.
4. Allow transmission oil to drain out.
5. Clean drain plug and torque as
required.
How to Fill Fluid
1. Remove transmission oil fill plug.
2. Make sure drain plug is properly
installed.
3. Fill with approved oil until the oil
starts flowing out the fill hole.
4. Clean, install, and properly and
torque fill plug.
Troubleshooting
Diagnostics
In the event there is a problem with an
Automated Transmission, there are three
primary tasks the driver should perform:
1. Note the driving condition under
which the problem occurred.
2. Note the condition of the
transmission under which the
problem occurred (i.e. operation
mode (Drive, MANUAL, LOW),
current gear, engine speed, etc.).
3. Reset system.
Transmission Reset Procedure
In some cases, proper transmission
operation can be restored by “resetting” the
Transmission Control Module (TCM). Use
the following procedure to reset the TCM.
1. Continue to drive the vehicle to a
safe location before selecting “N”
NEUTRAL.
NOTE
Once “N” NEUTRAL is selected, a gear
engagement may not be allowed de-
pending on the nature of the problem.
2. Place the Transmission Driver
Interface Device in Neutral “N”.
3. Set the vehicle parking brake.
WARNING
Apply parking brake and follow vehicle
manufacturer parking instructions. Fail-
ure to follow these instructions could
cause unintended vehicle movement re-
sulting in death, serious injury or dam-
age to property.
4. Turn the vehicle ignition to the “off”
position.
5. Wait at least 2 minutes.
6. Restart the engine.
7. If the problem continues, contact a
service facility to have the vehicle
and transmission system
evaluated.
Transmission Air Supply
For optimal performance, the PACCAR
Automated Transmission requires a
nominal air supply operating range
between 90 psi (5.9 bar) and 130 psi (9.0
bar).
MAINTENANCE - How to Fill Fluid
34 Y53-1272-1B1 (08/17)
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