CAT: 8612 November 2019
Page 157
OPERATING INSTRUCTIONS
Never drive your vehicle on improved roads/highways with the ABS
off-road function turned on. When you drive your vehicle onto an
improved road surface/highway, immediately turn off the ABS off-road
switch. Failure to do so will cause the ABS system to not function
properly if required and could result in an accident and/or injury.
•
The ABS lamp flashes slowly during off-road mode engagement.
This is done to alert the driver of a modification to the ABS control
software.
• At speeds above 40km, the ABS controller automatically switches
back to normal on-highway control mode.
• At speeds between 16 and 40km, the ABS control software is
modified to allow short periods (0.25 seconds) of locked-wheel
cycles.
•
At speeds below 16km, the ABS control software is turned off to
allow locked wheels.
•
When the ABS off-road function is enabled, the retarder disable
output is turned off. That is, the engine retarders are left to function
without ABS intervention.
For more information explaining individual EBSS elements, see your
Electronic Customised Maintenance Manual (USB), Section 5 - Air System.
For vehicles with EBSS read either BW2428 or BW2429 as specified.
HILL START ASSIST (HSA)
Vehicles fitted with Eaton UltraShift Plus transmissions or
PACCAR Automated transmission also have the Hill Start
Assist feature. HSA defaults to the ON position. It can
be turned OFF by pressing and releasing the HSA switch,
however, it will turn back on after the first successful launch.
If the switch is turned off, the lamp in the HSA switch will
flash. For HSA to function the following conditions must
be met:
• Vehicle must be on incline greater than 3% and in a forward mode.
• Bring vehicle to a stop and depress the service brakes then release
the service brakes.
The vehicle will begin to move after 3 seconds, and the clutch will perform
partial engagements to slow the vehicle motion. You must either step on
the brake or apply the throttle.
OFF
OFF
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