Doosan D35C-5 FDA04 Operation & Maintenance Manual page 109

Basic Troubleshooting (Gasoline)
Problem
Engine Cranking
but Will Not Start
(Gas)
Probable Cause
Fuel tank empty
Clogged fuel filter
Faulty vapor connection between
the pressure regulator/ converter
and the mixer (LPG)
Electric Fuel Pump malfunction
(GAS)
Fuel Pressure regulator malfunction
Fuel Injector malfunction
Incorrect air/fuel or ignition/ spark
control
No VR Sensor Signal
Fill fuel container
The tank should be at least ¼ full to

properly prime the fuel pump.
Fuel select switch is not on GAS

Repair/replace as required
See Maintenance section Primary and

Secondary Fuel Filter replacement
Check connection
Verify no holes in hose

Clamps must be tight

Look for kinked, pinched and/or

collapsed hose
Check electrical connection
Check Relay and fuse

Turn key ON and verify pump is operating
Test pressure regulator operation
See Engine Service Manual

Test Injector operation
See Engine Service Manual

See Advanced Diagnostics
Verify the VR signal is present
See Advanced Diagnostics

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Operation Section
Corrective Action