Doosan D50S-5 Operation & Maintenance Manual page 87

Will Will
Accelerate/Hesitat Accelerate/Hesitat
ion ion
Acceleration Acceleration
Problem Problem
Will Will
Accelerate/Hesitat Accelerate/Hesitat
ion ion
Excess flow Excess flow valve valve closed
Clogged Clogged fuel fuel filter filter
Plugged Plugged fuel fuel line line
Pressure regulator Pressure regulator freezes
Fuel Lock-off Fuel Lock-off malfunction malfunction
Incorrect idle speed or ignition Incorrect idle speed or ignition
problem problem
Engine Mechanical Engine Mechanical
Not Not
Fuel Fuel container container almost
During During
Excess flow Excess flow valve valve closed
Probable le Cause Probab
Not Not
Clogged Clogged fuel fuel filter filter
During During
closed Reset Reset excess
Repair/replace Repair/replace as
Remove Remove obstruction
freezes Check level Check
Check coolant hoses Check coolant hoses
Repair/replace Fuel Repair/replace
See Advanced Diagnostics See Advanced Diagnostics
See Engine Service Manual See Engine Service Manual
almost empty empty LPG Vapor LPG
closed Reset excess Reset
86 86
Cause
Repair/replace as Repair/replace
capacity capacity
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
as required required
See Maintenance Section, LP Fuel See Maintenance Section, LP Fuel
 
Filter replacement Filter replacement
obstruction from from the the fuel fuel line
Close liquid fuel valve Close liquid fuel valve
 
Using caution, disconnect the fuel Using caution, disconnect the fuel
 
line (some propane may escape) line (some propane may escape)
Clear obstruction with compressed Clear obstruction with compressed
 
air air
Re-connect fuel line Re-connect fuel line
 
Slowly open liquid fuel valve & Leak Slowly open liquid fuel valve & Leak
 
test test
level in in cooling cooling system system
Must be full, check coolant strength Must be full, check coolant strength
 
-35F minimum -35F minimum
 
Watch for kinks and/or pinched Watch for kinks and/or pinched
 
hoses hoses
Verify one pressure hose and one Verify one pressure hose and one
 
return hose return hose
Fuel Lock-off Lock-off
See Engine Service Manual See Engine Service Manual
 
Vapor from from liquid liquid outlet outlet
Fill fuel container Fill fuel container
 
Do Do not not exceed exceed 80% 80%
 
capacity capacity
excess flow flow valve valve
Close liquid valve Close liquid valve
 
Wait for a "click" sound Wait for a "click" sound
 
Slowly open liquid valv Slowly open liquid valve e
 
Operation Section Operation Section
Corrective Action Corrective Action
as required required
See Maintenance Section, LP Fuel See Maintenance Section, LP Fuel
 
Filter replacement Filter replacement
line
of of liquid liquid