TROUBLESHOOTING & REPAIR
F-17 F-17
RANGER 305D
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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
1-888-935-3877.
PROBLEMS
(SYMPTOMS) POSSIBLE AREAS OF
MISADJUSTMENT(S) RECOMMENDED
COURSE OF ACTION
ENGINE AND IDLE PROBLEMS
The engine will not develop full
power.
1. The fuel may be old or contami-
nated. Supply the engine with
fresh, clean fuel.
2. The fuel filter may be clogged;
replace the filter if necessary.
3. The air filter may be clogged;
replace if necessary.
1. The engine may be in need of
adjustment or repair.
The engine will not idle down to low
RPM. The machine has normal
weld output and auxiliary power.
1. Make sure the idle switch is in
the “AUTO IDLE” position.
2. Make sure there is no external
load on the weld terminals or
the auxiliary power receptacles.
3. Check for mechanical restric-
tions in the idler solenoid link-
age.
1. Perform the Idle Solenoid
Test.
2. Check for damaged wiring or
faulty connections at idle sole-
noid, the pull coil PC board, the
run/stop switch, and the start
button.
3. Check for loose or damaged
wiring or faulty connections at
leads #404 and #215. (Control
PC Board P2-4 and P2-5) See
Wiring diagram.
4. Set the idle switch in the
“AUTO” position. Set the mode
switch to the CC-STICK posi-
tion. Make sure that no lead is
applied to either weld output or
the auxiliary output.
5. Start the machine and allow it to
run for about 30 seconds.
6. Manually move the idle solenoid
plunger to the idle position. If
the solenoid engages and holds
in the idle position, the pull coil
PC board is probably defective;
replace it.
CAUTION
Observe Safety Guidelines
detailed in the beginning of this manual. TROUBLESHOOTING GUIDE