Komatsu PC22MR-3 Operation & Maintenance Manual page 99

Hydraulic excavator
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FUNCTIONING
INSTRUMENTS AND CONTROLS
(1) Ignition switch
This is a four-position rotary switch and is used to switch the
engine on and off.
Position OFF (A)
When the switch is in this position, the ignition key can be
inserted and removed. When the key is turned to this position,
the power supply to the electric circuit is interrupted and the
engine stops.
Position ON (B)
The load and light circuits are under voltage. Keep the key in
this position when the engine is on.
Position START (C)
This is the ignition position. Keep the key in this position to
make the starter run. As soon as the engine starts, release the
key, which will automatically return to position ON.
Position HEAT (preheating) (D)
When starting the engine in cold weather, turn the key to
position HEAT for approximately 18 seconds, until the
corresponding warning light goes out. Release the key, which
will automatically return to position OFF. Start the engine by
rotating the key to position START.
NOTICE
If the engine has stopped due to lack of fuel, start it by
proceeding as follows: turn the ignition switch to position
ON, wait for 15 seconds and then turn the key to position
START.
(2) Horn
This button is positioned at the centre of the right lever knob
and serves to send out a warning signal at the beginning of
work and in case of danger.
WEAM014500
3-11

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