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FUNCTIONING
Checking and cleaning the filtering element
q Fuel is flammable; do not use naked flames and do not smoke while draining the water separator.
q If fuel is spilled, wipe it up immediately.
If the decanting device red ring (1) is at the bottom of the
container (2), it means that there is no water.
If the ring (1) floats, it means that there is water up to the ring
lower surface; therefore, it is necessary to drain water following
the procedure below.
1. Open the engine bonnet and move the lever (3) to the
locking position (A). (For details, see "ENGINE HOOD (3-
32)").
2. With the filter wrench, loosen the ring nut (4), then remove
the container (2) and eliminate the water accumulated
inside it.
3. Put back the casing (2) and tighten the metal ring (4).
4. Set the lever (3) to the opening position (B).
5. Drain any water or sediment from the fuel tank. For further
details, see "DRAINING THE FUEL TANK (4-32)".
Checking the wiring system
q If fuses are corroded, rusted or do not hold well in place, replace them with fuses featuring the same
rating; before replacing a fuse, make sure that both the starter key and the battery main switch are
turned to OFF.
q If cable harness have short-circuit traces, contact the Komatsu distributor to find the failure cause and
repair it.
q Before checking the wiring, take all the necessary safety precautions.
q Always keep the battery surface clean and make sure that the charge level warning light is always
visible.
Make sure that the fuses are not damaged, that fuses with the required capacity are used, that there are no
disconnected, broken, or short-circuited wires; furthermore, check the terminals, and tighten any loose ones.
Check the wiring of the battery, the starter and the alternator carefully.
In addition, remove any flammable material that may have accumulated around the battery.
For troubleshooting and repairs, contact your Komatsu distributor.
USE OF THE MACHINE AND RELATED CONTROLS
WARNING
WARNING
WEAM014500
3-53
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