Snap-on Tools Corporation Kenosha, WI 53141-1410 17
TROUBLE SHOOTING (Cont.) (SYMBOL*)
FOR TECH. SERVICE, CALL TOLL-FREE 1-800-232-9353
(SYMBOL*) - USE THIS IDENTIFIER, ALONG WITH THE SCHEMATIC DIAGRAM FOUND IN THE SERVICE
MANUAL, FOR TROUBLE-SHOOTING PURPOSES.
FAULT POSSIBLE CAUSE REMEDY
FAULTY WELDS (Cont.)
"Birdnesting" Excessive feed roll tension. Reduce tension. See page
(Wire wrapping 8.
around drive Poor alignment. Make sure wire is
rolls) properly aligned
across roller.
Oversize contact tip. Replace contact tip with
correct size.
"Cold" weld Incorrect machine settings. Increase heat & wire
puddle. speed.
Incorrect shielding gas. Replace with proper gas.
Excessive wire stick-out. Hold torch closer to
work.
Poor connections. Check and tighten all
connections.
Faulty diode. Test diodes, replace
(D1-D2)
faulty diode(s). See
page 18.
Heavy spatter. Incorrect machine settings. Increase heat, decrease
wire feed speed.
Incorrect shielding gas. Replace with proper gas.
Excessive wire stick-out. Hold torch closer to
work.
Porous welds. No shielding gas. Turn on gas.
Not enough gas flow. Check hoses for leaks,
make sure cylinder is
not empty. Increase
flow rate.
Contaminated wire. Change wire.
Faulty gas solenoid. Replace solenoid.
(GS)
Incorrect electrode wire. Use correct wire.
Contaminated base material. Clean or etch base
material.
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