Doosan D20S-5 Operation & Maintenance Manual page 94

Operation Section Operation Section
Problem Problem
Excessive Excessive
Consumption/LP Consumption/LP
G Exhaust Smell G Exhaust Smell
Probable Cause Probable Cause
Air/Fuel Mixer Air/Fuel Mixer malfunction malfunction
Fuel Fuel
Air Air filter filter clogged clogged
Vacuum leak Vacuum leak
Pressure regulator malfunction/fuel Pressure regulator malfunction/fuel
pressure too high pressure too high
Faulty FTV Faulty FTV
Weak ignition and/or spark control Weak ignition and/or spark control
Incorrect air/fuel control Incorrect air/fuel control
Exhaust Exhaust system system leaks leaks
Oxygen Oxygen sensor sensor failure failure
-91- -91-
Corrective Action Corrective
Check mixer Check mixer
See Engine Service Manual See Engine Service Manual
 
Check air Check air filter filter
Clean/replace as required Clean/replace as required
 
Check Check system system
regulator to FTV and mixer regulator to FTV and mixer
  Repair/replace as necessary Repair/replace as necessary
Test pressure regulator operation Test pressure regulator operation
See Engine Service Manual See Engine Service Manual
 
Check Check FTV FTV
obstructions obstructions
See See
 
operation operation
Repair and/or replace as necessary Repair and/or replace as
 
See Advanced Diagnostics See Advanced Diagnostics
See Advanced Diagnostics See Advanced Diagnostics
Repair exhaust Repair exhaust system
Replace Replace as as necessary
See Advanced Diagnostics See Advanced Diagnostics
 
Action
vacuum vacuum hoses hoses
for for housing housing cracks cracks
Advanced Advanced Diagnostics FTV Diagnostics
necessary
system
necessary
from from
or or
FTV