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Black smoke is produced.
Driven machine normal?
Insufficient output
Improper fuel
Uneven injection volumeExcess injection volume
Malfunction of lever and linkage
Too early injection timing
Improper adjustment
Fuel
Fuel pump
Governor
Hydraulic pressure source
Refer to “Insufficient output.”
Set relief pressure of control valve
Replace
Adjust or replaceAdjust
Repair or replaceAdjust
Adjust or replace
White smoke is produced.
Fuel
Lube oil
Clogged air cleaner
Damaged or worn
valve stem
Flaws or wear
of piston
Damaged or worn
valve guide
Flaws or wear
of liner
Leakage through cylinder
head gasket
Too late injection timing
Defective valve
stem sealing
Seizure, breakage, or
wear of piston ring
Excess intake air risistance
Fuel pump
Oil pressure drop
Breather oil rise
Thermostat malfunctionOver-cooling
Water intrusion in fuel
Improper SAE grade
Clogged intake air pipe
Intrusion of low-quality fuel or impurities
Repair or replace
Replace
Replace
clean or replace
Replace
Replace ReplaceReplace
Adjust or replace
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