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TROUBLESHOOTING & REPAIR
F-10 F-10
RANGER 250
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely,
contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
ENGINE PROBLEMS
The engine shuts down shortly
after starting.
1. Check for adequate fuel supply
and a clean fuel filter.
2. Low oil level. Fill to proper
level. Start engine and look for
leaks.
3. Check the battery cables for
loose or faulty connections.
1. Check the RUN/STOP switch
and associated leads for loose
or faulty connections.
2. The oil pressure switch may be
faulty. Replace if necessary.
The engine will not idle down to low
speed. The machine has normal
weld output and auxiliary power.
1. Make sure the IDLER switch is
in the "AUTO" position.
2. Make sure there is NOT an
external load on the weld termi-
nals or the auxiliary power
receptacles.
3. Check for mechanical restric-
tions in the idler solenoid link-
age.
1. Check leads #210C and 215 for
loose or faulty connections.
See the Wiring Diagram.
2. Perform the Idler Solenoid
Test.
3. The Control Board may be
faulty.
CAUTION
The engine will not go to high idle
when using the auxiliary power.
Auxiliary power is normal when the
IDLER switch is in the "HIGH" posi-
tion. Automatic idle function works
properly when the welding termi-
nals are loaded.
1. Make sure the auxiliary power
leads are tight.
2. The automatic idler may not
function if the auxiliary power is
loaded to less than 100 watts.
1. Make sure leads #3 and #6
pass through the toroid twice in
opposite directions. See the
Wiring Diagram.
Observe Safety Guidelines
detailed in the beginning of this manual.
TROUBLESHOOTING GUIDE