Komatsu GD555-5 Operation & Maintenance Manual page 98

OPERATION
RPM SET MODE SELECTOR SWITCH
This switch (17) is used to switch the power for the RPM SET
system ON-OFF and to select the RPM SET mode.
Position (A): The automatic mode is selected and the indicator on
the (A) side of the switch lights up.
Position (B): OFF
The electric power for the RPM SET system is shut
off and the indicator of the switch goes out.
Position (C): The manual mode is selected and the indicator on the
(C) side of the switch lights up.
REMARK
Use the RPM SET mode selector switch only for ON/OFF operations of the electric power for the RPM SET
system.
Use the RPM SET switch to set the engine speed.
When cancelling or not using the RPM SET system, turn the RPM SET mode selector switch OFF.
After starting the engine, the power remains OFF wherever the position of this switch is. If starting the engine
when the switch is in the position (A) or (C), turn it OFF once and then press the position (A) or (C) again.
AUTO mode
Once the accelerator opening angle has been set, it can be canceled by operating the accelerator pedal or brake
pedal.
If the back of the switch is pushed (RESUME/DECEL) in the temporary cancel condition, the accelerator opening
angle will be restored to the position before the temporary cancel.
After the accelerator opening angle has been set and the accelerator pedal is fully released, if the accelerator
pedal is depressed beyond the set opening angle, the engine speed will rise and the setting is temporarily
canceled. During temporary cancel, the engine speed follows only the accelerator pedal.
If the accelerator pedal opening angle is set and the brake pedal is depressed, the setting is temporarily canceled
and the engine speed follows only the accelerator pedal.
REMARK
If the temporary cancel is actuated, the machine monitor RPM SET pilot lamp lights up.
If the temporary cancel is actuated and the front of the RPM SET switch (SET/ACCEL) is pressed, the
accelerator opening angle at that point is maintained as the new value for the accelerator opening angle.
If the temporary cancel is actuated and the engine stops, the accelerator opening angle saved in memory is
deleted, and it cannot be restored even if the back of the switch (RESUME/DECEL) is depressed.
EXPLANATION OF COMPONENTS
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