.
OPERATION
EXPLANATION OF COMPONENTS
PARKING BRAKE SWITCH
WARNING
When parking or leaving the machine, always apply the parking brake.
NOTICE
During loading operations, do not apply the parking brake. Apply the retarder brake.
This switch (10) is used to actuate and release the parking brake
valve.
(a): Parking
The parking brake is applied.
(b): Travel
The parking brake is released.
When the switch is set to the PARKING position, the parking brake
pilot lamp lights up.
When the switch is set to the PARKING position, if the shift lever
is at any position other than N, the central warning lamp will flash
and the alarm buzzer will sound.
If the pressure in the accumulator goes below 5.4 MPa (55 kgf/cm
2
, 781 PSI), the emergency brake and parking
brake are automatically applied. For details of the method of releasing the brake, see "WHEN PARKING BRAKE
HAS BEEN ACTUATED IN EMERGENCY (PAGE 3-121)".
When working at night, the symbol inside the switch lights up regardless of the selected position of the switch.
REMARK
If the engine is stopped with the parking brake switch at TRAVEL, the parking brake will be applied even though the
switch is at TRAVEL. In this case, start the engine again, operate the switch to PARKING, and then move it back
to TRAVEL to cancel the parking brake.
AISS LOW SWITCH
Using this switch (11), it is possible to switch the AISS freely
between AUTO and LOW. Use each position as follows.
(a): AUTO position
For normal operations
(b): LOW position
When fine control of the machine is needed, such as when
putting it into a garage.
If the switch is at AUTO position:
When stopping the machine, if the parking brake or retarder
brake are operated, the idling is automatically adjusted to low
speed; when starting the machine, if the parking brake is
canceled, the idling is automatically adjusted to high-speed.
The water temperature is detected, and when it is at low temperature, the idling is automatically adjusted to high
speed to reduce the warming-up time.
When working at night, the symbol inside the switch lights up regardless of the selected position of the switch.
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