140-3 SERIES
12-115
TROUBLESHOOTING S-7
S-7 Exhaust smoke is black (incomplete combustion)
General causes why exhaust smoke is black
• Insufficient intake of air
• There is excessive fuel.
• Abnormal fuel injection condition
• Improper selection of fuel
• Engine overheating
★ See troubleshooting for [Overheat].
• Controller controlled by delayed mode
(The injection amount (output) is limited because
an error has occurred in the electrical system.)
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