Komatsu D51EX-24, Operation & Maintenance Manual

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REMARK
Even if Fan Reverse Mode is set while the engine is run-
ning, the fan rotation direction is not reversed.
The screen in the figure is displayed to inform the operator
that the direction of rotation of the fan has not been
changed.
Stop the engine once and perform the steps 3 to 8.
10. Turn the starting switch (1) to START position and start the
engine.
The hydraulic fan rotates in reverse.
11. Turn the fuel control dial at High idle (MAX) position, and run the engine at high idle.
Change the time for running the engine at high idle corresponding to the seriousness of clogging.
Normal clogging: 1 to 2 minutes
Excessive clogging: 2 to 3 minutes
12. After cleaning, turn the fuel control dial to Low idle (MIN) position.
Run the engine at low idle for approximately 10 seconds.
13. Turn the starting switch (1) to OFF position and stop the engine.
REMARK
• If dirt is caught in the radiator fins, blow with compressed air to clean.
• Check that there is no dirt sticking to the aftertreatment devices, and area around the turbocharger.
• In a cold circumstance, perform the cleaning by the hydraulic fan reverse mode within less than 5 mi-
nutes.
If the fan reverse rotation is performed for a long time, the DEF hose may freeze.
14. Close the engine side cover (6), hydraulic tank inspection cover (10), and fuel tank inspection cover (11).
15. Install the front cover (7) and engine side covers (8) and (9) with mounting bolts.
16. Install the covers (4) and (5) with mounting bolts.
METHOD FOR CLEANING RADIATOR FIN
k k
WARNING
• If compressed air, high-pressure water, or steam hits your body directly or dirt is scattered by use
of them, there is a danger of personal injury. Wear the protective equipment such as the protective
eyeglasses and dust mask.
• When performing cleaning, always stop the engine and check that the fan is not rotating. If you
touch the fan when it is rotating, it will cause serious personal injury or death.
1.
Remove the bolts (1) (2 pieces) on the lower part of the ra-
diator grille.
MAINTENANCE MAINTENANCE PROCEDURE
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