Lincoln Electric POWER WAVE SVM135-B Service Manual page 83

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POWER FEED
Observe all Safety Guidelines detailed throughout this manual.
PROBLEMS
(SYMPTOMS)
The gun tip seizes in diffuser.
Poor arc striking with sticking or
"blast-offs". The weld bead may
be narrow and ropy with weld
porosity.
The arc is variable and/or hunting.
The power source, Control Box
and drive units seem to be operat-
ing properly.
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 216-383-2531 or 1-800-833-9353.
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TROUBLESHOOTING AND REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
WELDING PROBLEMS
1. The tip may be overheating due
to prolonged or excessive high
current and /or duty cycle. Do
not exceed the current and duty
cycle rating of the gun.
2. A light application of high tem-
perature antiseize lubricant
(such as Graphite Grease) may
be applied to tip threads.
1. Make sure the weld procedures
are correct for the process being
used. Check gas, wire feed,
speed and arc voltage.
2. Remove the gun liner and check
the rubber seal for any sign of
deterioration or damage. Be
sure the set screw in the con-
nector block is in place and
tightened against the liner
bushing.
3. Check the welding cables for
loose or faulty connections.
1. Check the contact tip. It may be
worn or the wrong size for the
electrode wire being used.
2. Check for loose or faulty weld-
ing cables and connections.
3. Make sure the weld procedures
are correct for the process being
used. Check gas, wire feed
speed and arc voltage.
CAUTION
POWER WAVE 455/POWER FEED 10
RECOMMENDED
COURSE OF ACTION
1. Contact the Lincoln Electric
Service Department, 216-383-
2531 or 1-800-833-9353
(WELD).
1. Contact the Lincoln Electric
Service Department, 216-383-
2531 or 1-800-833-9353
(WELD).
1. Contact the Lincoln Electric
Service Department, 216-383-
2531 or 1-800-833-9353
(WELD).
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