Komatsu D475A-5E0 Operation & Maintenance Manual page 169

OPERATION OPERATION
3. Check that engine pre-heating pilot lamp (3) on the monitor
panel lights up.
If the engine pre-heating pilot lamp does not light, go to step 5.
4. Keep in this condition until engine pre-heating pilot lamp (3)
goes out.
(Pre-heating is completed after approx. 12 seconds, and the
lamp goes out.)
5. When preheating pilot lamp (3) goes off, turn the key of ignition
switch (2) to START position (C) to crank the engine.
The time that preheating pilot lamp (3) stays on changes
according to the ambient temperature as shown in the table
below.
Ambient temperature
0 ° C (32 ° F) to
-20 ° C (-4 ° F)
-20 ° C (-4 ° F) or less
6. When the engine starts, release the key in starting switch (2).
The key will return automatically to ON position (B).
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Pre-heat time
20 to 40 seconds
40 seconds
OPERATION OPERATION