Doosan D20S-5 Operation & Maintenance Manual page 96

Operation Section
Problem
Will Not
Accelerate/Hesita
tion During
Acceleration
Engine Stalls
Probable Cause
Clogged fuel filter
Faulty vapor connection between
the pressure regulator/converter
and the mixer
Throttle butterfly valve not opening
or sticking
Foot Pedal signal
intermittent
Incorrect air/fuel or ignition control
Engine Mechanical
Fuel container almost empty
Excess flow valve closed
Clogged fuel filter
Plugged fuel line
Corrective Action
Repair/replace as required
See Maintenance
Section, LP Fuel Filter replacement
Check connection
Verify no holes in hose
Clamps must be tight
Look for kinked, pinched and/or
collapsed hose
See Advanced Diagnostics
incorrect or
See Engine Service Manual
LPG Vapor from liquid outlet
Fill fuel container
Do not exceed 80% of liquid capacity
Reset excess flow valve
Close liquid valve
Wait for a "click" sound
Slowly open liquid valve
Repair/replace as required
See Maintenance Section, LP Fuel
Filter replacement
Remove obstruction from the fuel line
Close liquid fuel valve
Using caution, disconnect the fuel line
(some propane may escape)
Clear obstruction with compressed air
Re-connect fuel line
Slowly open liquid fuel valve & Leak
test
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