Komatsu PC118MR-8 Operation And Maintenance Manual page 152

INSTRUMENTS AND CONTROLS
(16) Battery main switch
The battery main switch is located inside the battery
compartment and can be accessed after opening the left rear
door.
Turn the key anticlockwise, to (O) OFF, to interrupt the current
supplied by the battery to the electrical system; for safety
reasons, extract the key after turning the switch to OFF.
q Position (O) OFF:
Power supply interrupted.
The key can be extracted in this position.
q Position (I) ON:
All electric circuits are powered.
Make sure that the switch is at this position before starting
the engine.
NOTICE
q The battery main switch must always be set to ON,
except in the following cases:
q When the machine is not going to be used for a
long period or when the machine is prepared for
prolonged inactivity.
q When the electric circuits need to be fixed.
q When arc welding.
q When the battery is removed.
q When a fuse is replaced.
q Before turning the battery main switch to OFF, wait at
least one minute after shutting off the engine. Never
turn the switch to OFF while the engine is running as
the electric circuits may be seriously damaged.
q When the battery is disconnected, all electric circuits
remain powerless, risking losing all data stored
regarding time adjustment or radio channels selection
and other functions.
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FUNCTIONING