Doosan D50S-5 Operation & Maintenance Manual page 88

Acceleration Acceleration
Engine Stalls Eng ine Stalls
Operation Section Operation Section
Problem Problem
Engine Stalls Eng ine Stalls
Faulty vapor connection between Faulty vapor connection between
the pressure regulator/converter the pressure regulator/converter
and the mixer and the mixer
Throttle Throttle butterfly butterfly valve valve
opening or sticking opening or sticking
Foot Pedal signal incorrect or Foot Pedal signal incorrect or
intermittent intermittent
Incorrect air/fuel or ignition control Incorrect air/fuel or ignition control
Engine Mechanical Engine Mechanical
Fuel container Fuel container almost almost empty empty
Excess flow Excess flow valve valve closed closed
Clogged fuel Clogged fuel filter filter
Plugged Plugged fuel fuel line line
Probab Probable le Cause Cause
Fuel Lock-off Fuel Lock-off malfunction malfunction
Faulty vapor connection between Faulty vapor connection between
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 for kinked, pinched and/or Look for kinked, pinched and/or
 
collapsed hose collapsed hose
not not See Advanced Diagnostics See Advanced Diagnostics
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 Do not exceed 80% of liquid
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capacity capacity
Reset Reset excess excess flow flow valve
Close liquid valve Close liquid valve
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Wait for a "click" sound Wait for a "click" sound
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Slowly open liquid valve Slowly open liquid valve
Repair/replace Repair/replace as
See Maintenance See Maintenance
 
Section, LP Fuel Filter replacement Section, LP Fuel Filter replacement
Remove obstruction Remove obstruction from
Close liquid fuel valve Close liquid fuel valve
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Using caution, disconnect the fuel Using caution, disconnect the fuel
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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
87 87
Corrective Action Corrective
Repair/replace Repair/replace Fuel
See Engine Service Manual See Engine Service Manual
 
Check connection Check connection
liquid outlet outlet
valve
as required required
from the the fuel fuel line line
Action
Fuel Lock-off Lock-off