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34. ARSC (AUTOMATIC RETARD SPEED CONTROL)
When traveling downhill, if the switch is pressed at the speed that is to be maintained, the retarder
is automatically actuated to prevent the travel speed from exceeding the set speed, so this makes
retarder operations easy.
There are two types of travel speed display for the set travel speed display: km/h and MPH. Check
the display monitor on your machine when setting the travel speed.
‡ The ARSC system is actuated when the system switch is ON. Before traveling downhill, check
that the system switch is ON.
‡ If the speed is set to a speed that exceeds the maximum permissible speed obtained from the
brake performance graph, there is danger that there will be overheating and that the retarder
brake may be damaged. Always set the speed so that itdoes not exceed the maximum
permissible speed.
‡ When the ARSC is actuated on slippery roads, the tires may lock. If this happens, cancel the ARSC.
‡ If any abnormality occurs in the system and braking cannot be carried out properly, the alarm
sounds and the system is turned OFF to cancel the ARSC. If necessary, control the machine with
the retarder control lever and foot brake to stop the machine in a safe place, then turn the system
switch OFF.
34.1 EXPLANATION OF COMPONENTS
The position of system switch q may differ according to the combination of optional equipment.
a Set
b Increase speed
5-42
WARNING
c Decrease speed
d Cancel
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Troubleshooting
