Komatsu WA380-6 Operation & Maintenance Manual page 194

OPERATION
EMERGENCY STEERING
(If equipped)
Never actuate the emergency steering except during emergencies or
when checking the function.
The emergency steering can be used continuously for a maximum of 60
seconds. Operating it continuously for more than 60 seconds may
damage the system.
When using the emergency steering, travel at less than 5 km/h (3.1
MPH).
If the steering becomes heavy, keep the emergency steering switch
pressed, move the machine immediately to a safe place, then stop the
machine.
During emergencies or when stopping the engine to check the
function, press emergency steering switch (1). Emergency
steering pilot lamp (green) (2) will light up and the steering can be
operated.
Emergency steering pilot lamp (green) (2) lights up to inform the
operator that the emergency steering system has been actuated.
The emergency steering system is provided to enable the machine to be steered under the following conditions.
The starting switch is at the ON position.
The steering oil pressure is low or there is no pressure.
(When the engine has stopped or there is a failure in the steering oil pressure pump, etc.)
When the starting switch is turned to the ON position, the emergency steering automatically carries out a self check
for 3 seconds. For details, see "EMERGENCY STEERING SELF-CHECK FUNCTION (PAGE 3-138)".
When the emergency steering controller detects lack of oil
pressure in the steering system, steering oil pressure caution lamp
(red) (3) and central warning lamp (4) light up, and the alarm buzzer
sounds intermittently.
When this happens, if the machine is traveling at a speed of more
than 2 km/h (1.2 MPH), the electric pump motor is automatically
actuated and emergency steering pilot lamp (green) (2) lights up.
Steering oil pressure caution lamp (red) (3) lights up to inform the
operator that there is a failure in the steering system.
If steering oil pressure caution lamp (red) (3) lights up, move the machine immediately to a safe place and stop it.
Locate the cause and do not operate the machine until it has been repaired.
REMARK
If any function of the oil pressure system is used when the engine is running at low speed, steering oil pressure
caution lamp (red) (3) may light up for a moment, but if the lamp goes out again soon, there is no problem.
When the emergency steering controller detects that the oil pressure in the steering circuit has been restored, the
actuation of the emergency steering system is stopped.
CAUTION
OPERATION
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