Komatsu PC138USLC Operation & Maintenance Manual page 178

OPERATION
Check Electric Wiring
If fuses are frequently blown or if there are traces of short-circuiting on the electrical wiring, promptly ask your Komatsu
distributor to locate the cause and make the repair.
Keep the top surface of the battery clean and check the breather hole in the battery cap. If it is clogged with dirt or dust, wash
the battery cap to clear the breather hole.
Check that there is no damage to the fuses; that fuses of the specified capacity are used; that there is no
disconnection or trace of short-circuiting in the electric wiring and no damage to the covering. Check also that there
is no loosened terminals. If any, tighten them.
Moreover, pay particular attention to the electric wiring when checking the battery, engine starting motor and
alternator.
Be sure to check that there is no inflammable material accumulated around the battery. If any is found, remove
immediately.
Check Working Lamp Switch
Check that the working lamps and lamps inside the instruments light up properly. Check also that there is no dirt
or damage.
If any lamp does not light up, the bulb is probably blown up or there is a disconnection, so ask your Komatsu
distributor to carry out repairs.
1. Turn the starting switch to the ON position.
2. Turn the lamp switch ON (night mode (a), and day mode (b))
and check that the working lamp lights up.
Check Function of Horn
1. Turn the key in the starting switch to the ON position.
2. Confirm that the horn sounds immediately when the horn
button is pressed.
If the horn does not sound, contact your Komatsu distributor for
repair.
MACHINE OPERATIONS AND CONTROLS
CAUTION
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