DRIVING - Snow/Ice Operation 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. 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. Avoid repeat attempts if the sliding axle is not moving.
NOTE 2 If repeat attempts are made and the au- tomated clutch starts to overheat, the display will indicate “CA” along with a warning tone. 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. Features NOTE 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. Use the transmission PTO switch to disengage the PTO. Sliding Trailer Axle Snow/Ice Operation 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. 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 Vehicle Facing Uphill – Forward Mode Y53-1272-1B1 (08/17) 21