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MAINTENANCE
CHECK ELECTRIC WIRING
If the fuse blows frequently, or there are traces of short-cir-
cuiting in the electric wiring, always locate and repair the
cause.
Check for damage of the fuse and any sign of disconnection or
short circuit in the electric wiring. Check also for loose terminals
and tighten any loose parts. Check the following points carefully.
Battery
●
Starting motor
●
●
Alternator
Please contact your Komatsu distributor for investigation and cor-
rection of the cause.
CHECK FOR WATER AND SEDIMENT IN SEDIMEN-
TOR. DRAIN WATER AND SEDIMENT
1. Open the cover at the rear right of the machine.
2. Inspect the water separator, and check if the ring inside has
risen to the marked line.
3. If the ring has risen to the marked line, carry out the proce-
dure from Step 4.
4. Set a container under the water separator to catch the
drained fuel.
5. Secure fuel line to prevent leakage.
6. Remove air bleed plug (5) at the top of the water separator.
7. Loosen drain valve (1) at the bottom of the water separator,
and drain the water and sediment into the container.
8. Loosen ring nut (2), then remove filter case (3).
9. Remove element (4) from the separator base.
10. Wash element (4) in clean diesel oil.
11. Check element (4), and replace it if it is damaged.
12. When installing element (4), perform Steps 9 and 8 in the
opposite order.
Tightening torque of ring nut (2): 40
13. Fill filter case (3) with fuel. When the fuel comes out from air
bleed plug (5), tighten air bleed plug (5).
WARNING
±
3 N•m
±
{4.1
0.3 kgf•m}
SERVICE PROCEDURE
273
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