Doosan D20S-5 Operation & Maintenance Manual page 89

Problem Problem
Difficult to Start Difficult to Start
Probable Probable Cause Cause
Fuel container Fuel container almost almost empty empty
Excess flow Excess flow valve valve closed closed
Clogged Clogged fuel fuel filter filter
Plugged fuel Plugged fuel line line
Faulty vapor connection between Faulty vapor connection between
the the pressure pressure regulator/converter regulator/converter
and the mixer and the mixer
Pressure Pressure regulator/converter regulator/converter
malfunction malfunction
Fuel Fuel container container almost almost empty empty
Air filter Air filter clogged clogged
Incorrect Incorrect air/fuel air/fuel or or ignition ignition control
Engine Mecha Engine Mechanical nical
-86- -86-
Corrective Action Corrective
LPG Vapor LPG Vapor from from liquid
Fill fuel container Fill fuel container
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Do not exceed 80% of liquid capacity Do not exceed 80% of liquid
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Reset excess Reset excess flow
Close liquid valve Close liquid valve
 
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Wait for a "click" sound Wait for a "click" sound
Slowly open liquid valve Slowly open liquid valve
Repair/replace Repair/replace as
See Maintenance Section, LP Fuel See Maintenance Section, LP Fuel
 
Filter replacement Filter replacement
Remove Remove obstruction obstruction from
Close liquid fuel valve Close liquid fuel valve
 
Using caution, disconnect the fuel line Using caution, disconnect the fuel line
 
(some propane may escape) (some propane may escape)
Clear obstruction with compressed air Clear obstruction with compressed air
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Re-connect fuel line Re-connect fuel line
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Slowly open liquid fuel valve Slowly open liquid fuel valve
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Leak test Leak test
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Check connection Check connection
Verify no holes in hose Verify no holes in hose
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Clamps must be tight Clamps must be tight
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Look Look for for
 
collapsed hose collapsed hose
Test pressure regulator/conv Test pressure r
See Engine Service Manual See Engine Service Manual
 
LPG Vapor LPG Vapor from from liquid
Fill fuel container Fill fuel container
 
Do not exceed 80% of liquid capacity Do not exceed 80% of liquid
 
Check Check air air filter filter
Clean/replace as required Clean/replace as required
 
control See Advanced See Advanced Diagnostics
See See Engine Engine Service Service Manual
Operation Section Operation Section
Action
liquid outlet outlet
capacity
flow valve valve
as required required
from the the fuel fuel line line
kinked, kinked, pinched pinched and/or and/or
egulator/converter o erter operation peration
liquid outlet outlet
capacity
Diagnostics
Manual