Paccar 12-Speed, Operator'S Manual

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1. Bring the vehicle to a complete
stop and depress the service
brake.
2. Select “N” on the Transmission
Driver Interface Device.
3. Select the transmission PTO
switch.
4. Select “Drive” or "Reverse" as
required for vehicle movement.
5. Release the service brake to
engage the clutch and the PTO.
6. Raise engine speed as required to
operate PTO.
NOTE
Use the transmission PTO switch to
disengage the PTO.
Snow/Ice Operation
The PACCAR Automated Transmission is
designed to work in coordination with the
ATC system to ensure optimal operation.
However, if the driver observes low friction
road conditions (snow, rain, ice, etc.) and
does not want the transmission to shift,
risking wheel slippage, the driver should
select MANUAL mode. MANUAL mode
holds the current gear position under most
operating conditions- the transmission will
only shift when the driver uses the up/
downshift request. Once road conditions
improve, the driver should revert back to
Drive mode.
Trailer Operation
Trailer Connecting
• Prior to backing under the trailer,
ensure proper trailer height.
• Use Low mode (1st gear) for
forward direction and Reverse (R1)
for reverse direction.
Sliding Trailer Axle
• Ensure axle rails and locks are
properly maintained.
• Follow proper procedure for
unlocking and sliding the trailer
axles.
• Use Low mode (1st gear) for
forward direction and Reverse (R1)
for reverse direction.
• Avoid repeat attempts if the sliding
axle is not moving.
NOTE
If repeat attempts are made and the au-
tomated clutch starts to overheat, the
display will indicate “CA” along with a
warning tone.
Features
Hill Start Aid Operation (HSA)
Hill Start Aid defaults to the “On” position.
In PACCAR Automated Transmissions, it
can be turned “Off” by pressing and
releasing the Hill Start Aid switch, however,
it will turn back on after the first successful
launch. If the switch is turned off, the lamp
in the Hill Start switch will flash.
The grade at which Hill Start Aid is active is
defaulted to 1% but can be configured to
activate on a 2% or 3% grade.
Vehicle Facing Uphill – Forward
Mode
DRIVING - Snow/Ice Operation
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