Lincoln Electric RED-D-ARC DX450 Service Manual page 60

F-16
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The engine starts but shuts down
immediately when the start button
is released.
The engine shuts down shortly
after starting.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
TROUBLESHOOTING AND REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FUNCTION PROBLEMS
See the operatorʼs manual, or the
operating section of this manual
for proper starting procedure.
Check the oil level.
Be certain that the engine is not
overheated.
Check that the machine had ade-
quate supply of fresh, clean fuel.
The fuel filter may be clogged.
Replace if necessary.
Check for adequate supply of
clean fresh fuel.
Check fuel and air filters, replace if
necessary.
Check oil level, add oil as required.
Look for oil leakage.
Check for loose or faulty battery
cable connections.
CAUTION
The Engine Control Unit may be
faulty.
Perform the Engine Control Unit
Test.
The engine may have inadequate
oil pressure.
The oil pressure switch or coolant
temperature switch may be faulty.
The oil pressure switch or coolant
temperature switch may be faulty.
Make sure the engine has oil and
oil pressure and the engine is not
overheated. See Wiring Diagram.
Check for faulty run/stop switch.
Check for damaged insulation in
the wiring between the Engine
Control Unit and the oil pressure
and coolant temperature switches.
See Wiring Diagram. .
The Engine Control Unit may be
faulty.
Perform the Engine Control Unit
Test.
DX450
F-16
RECOMMENDED
COURSE OF ACTION