HANDLE Automatic Retarder Speed Control (ARSC)
Pressing the set switch of the ARSC travel speed set lever when the travel speed becomes the desirable speed
on downhill automatically actuates the retarder to keep the travel speed, and the retarder operation becomes
easier.
WARNING
• ARSC system is enabled when “ARSC Setting” is set to “ON”.
Before entering the slopes, check that the appropriate travel speed is displayed on the ARSC set
travel speed indicator and the ARSC pilot lamp is lit.
• It is dangerous if the travel speed is set to the speed exceeding the maximum permissible speed
which is obtained from the braking performance curve. It may result in overheating and may dam-
age the retarder brake. Set the travel speed so that it does not exceed the maximum permissible
speed.
• The tires may be locked when the dump truck is running on a slippery hauling road and the ARSC
system is enabled. If it happens, refrain from using the ARSC system.
• When the system cannot be properly controlled due to a trouble in the system, the alarm sounds,
and the ARSC is canceled. If necessary, stop the machine at a safe place by controlling the retarder
control lever and brake pedal, and set “ARSC Setting” to “OFF”.
• The ARSC is not actuated with the gear shift lever at NEUTRAL position (N) or REVERSE position
(R). When the gear shift lever is shifted to NEUTRAL position (N) or REVERSE position (R) while
ARSC is actuated, the ARSC off pilot lamp lights up, and the ARSC set travel speed indicator goes
out, and the ARSC is canceled.
METHOD FOR OPERATING ARSC
OPERATION OF ARSC SYSTEM
1.
Set “ARSC Setting” to “ON” on “Machine Setting and Infor-
mation”.
The ARSC pilot lamp (1) lights up in white.
MACHINE OPERATIONS AND CONTROLS OPERATION
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