Doosan G20E-5, Operation & Maintenance Manual, Page: 90 / 210

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Operation Section Operation Section
Problem Problem Probable Probable Cause Cause Corrective Corrective Action Action
Fuel Fuel container container almost almost empty empty LPG LPG Vapor Vapor from from liquid liquid outlet outlet
 
Fill fuel container Fill fuel container
 
Do not exceed 80% of liquid Do not exceed 80% of liquid capacity capacity
Excess Excess flow flow valve valve closed closed Reset Reset excess excess flow flow valve valve
 
Close liquid valve Close liquid valve
 
Wait for a “click” sound Wait for a “click” sound
Slowly open liquid valve Slowly open liquid valve
Clogged Clogged fuel fuel filter filter Repair/replace Repair/replace as as required required
 
See Maintenance Section, LP Fuel See Maintenance Section, LP Fuel
Filter Filter replacem replacement ent
Plugged Plugged fuel fuel line line Remove Remove obstruction obstruction from from the the fuel fuel line line
 
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
 
Re-connect fuel line Re-connect fuel line
 
Slowly open liquid fuel valve & Leak Slowly open liquid fuel valve & Leak
test test
Pressure Pressure regulator regulator freezes freezes Check Check level level in in cooling cooling system system
 
Must be full, check coolant strength Must be full, check coolant strength
 
-35F minimum -35F minimum
Check coolant hoses Check coolant hoses
 
Watch for kinks and/or pinched hoses Watch for kinks and/or pinched hoses
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Verify one pressure hose and one Verify one pressure hose and one
return hose return hose
Fuel Fuel Lock-off Lock-off malfunction malfunction Repair/replace Repair/replace Fuel Fuel Lock-off Lock-off
 
See Engine Service Manual See Engine Service Manual
Incorrect idle speed or ignition Incorrect idle speed or ignition
problem
problem
See Advanced Diagnostics See Advanced Diagnostics
Will Not Run Will Not Run
Continuously
Continuously
Engine Engine Mechanical Mechanical See See Engine Engine Service Service Manual Manual
Fuel Fuel container container almost almost empty empty LPG LPG Vapor Vapor from from liquid liquid outlet outlet
 
Fill fuel container Fill fuel container
 
Do not exceed 80% of liquid Do not exceed 80% of liquid capacity capacity
Will Not Will Not
Accelerate/Hesita
Accelerate/Hesita
tion During
tion During
Acceleration
Acceleration
Excess Excess flow flow valve valve closed closed Reset Reset excess excess flow flow valve valve
 
Close liquid valve Close liquid valve
 
Wait for a “click” sound Wait for a “click” sound
Slowly open liquid valve Slowly open liquid valve