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TROUBLESHOOTING & REPAIR
F-13 F-13
RANGER 8
TROUBLESHOOTING GUIDE Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
WELDING PROBLEMS
The welding arc is “cold.” Engine
runs normally (3700 RPM no load).
Auxiliary power is functioning nor-
mally.
1. Check for loose or faulty con-
nections at the weld output ter-
minals and welding cable con-
nections.
2. The welding cable may be too
long or coiled, causing an
excessive voltage drop.
1. Check for the correct open cir-
cuit voltage (OCV) at the welder
output terminals (80VAC Max.
72VDC Max.). If the correct
voltage is present at the output
terminals, then check for loose
connections on the heavy cur-
rent carrying leads inside the
RANGER 8. See Wiring
Diagram.
2. If the OCV is low at the welder
output terminals, then Perform
The Engine Throttle Adjustment
Test.
3. Perform the Output Rectifier
Bridge Test.
4. Check for shorted or grounded
windings in the reactor and also
in the main stator. See Wiring
Diagram.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
1-800-833-9353 (WELD).