Doosan D20S-5 Operation & Maintenance Manual page 90

Operation Section Operation Section
Problem Problem
Will Not Run Will Not Run
Continuously Continuously
Will Not Will Not
Accelerate/Hesita Accelerate/Hesita
tion During tion During
Acceleration Acceleration
Probable Cause Probable 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
Pressure regulator Pressure regulator freezes freezes
Fuel Lock-off Fuel Lock-off malfunction malfunction
Incorrect idle speed or ignition Incorrect idle speed or ignition
problem problem
Engine Engine Mechanical Mechanical
Fuel Fuel container container almost almost empty empty
Excess flow Excess flow valve valve closed closed
-87- -87-
Corrective Action Corrective
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
 
Reset excess Reset excess flow
Close liquid valve Close liquid valve
 
Wait for a "click" sound Wait for a "click" sound
 
Slowly open liquid valve Slowly open liquid valve
Repair/replace as Repair/replace
See Maintenance Section, LP Fuel See Maintenance Section, LP Fuel
 
Filter Filter replacem 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
 
Re-connect fuel line Re-connect fuel line
 
Slowly open liquid fuel valve & Leak Slowly open liquid fuel valve & Leak
 
test test
Check level Check level in in cooling
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
 
Verify one pressure hose and one Verify one pressure hose and one
 
return hose return hose
Repair/replace Fuel Repair/replace
See Engine Service Manual See Engine Service Manual
 
See Advanced Diagnostics See Advanced Diagnostics
See Engine See Engine Service Service Manual
LPG Vapor LPG Vapor from from liquid
Fill fuel container Fill fuel container
 
Do not exceed 80% of liquid Do not exceed 80% of liquid capacity
 
Reset excess Reset excess flow
Close liquid valve Close liquid valve
 
Wait for a "click" sound Wait for a "click" sound
 
Slowly open liquid valve Slowly open liquid valve
Action
liquid outlet outlet
capacity
flow valve valve
as required required
ent
from the the fuel fuel line line
cooling system system
Fuel Lock-off Lock-off
Manual
liquid outlet outlet
capacity
flow valve valve