Komatsu PC200-8M0 Shop Manual page 926

600 Troubleshooting of engine (S-mode)
SEN06140-00
Method of using troubleshooting chart
<Example of troubleshooting> Exhaust gas is black (Incomplete combustion)
Let us assume that a trouble of "Exhaust gas is black" occurred and we checked the [Questions] and [Check
items] and found the following 3 items to be the causal symptoms; [Color of exhaust gas gradually became
black], [Power was lost gradually], and [Dust indicator indicates a red zone].
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40-600 PC200, 200LC, 220, 220LC-8M0