Lincoln Electric 10372 Service Manual page 83

F-19
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 oper-
ating 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 1-888-935-3877.
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TROUBLESHOOTING ND REP IR
POSSIBLE
MIS DJUSTMENT(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
connector 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.
C UTION
POWER W VE 455/POWER FEED 10
RE S OF RECOMMENDED
COURSE OF
1. Contact the Lincoln Electric
Service Department, 216-383-
2531 or 1-888-935-3877.
1. Contact the Lincoln Electric
Service Department, 216-383-
2531 or 1-888-935-3877.
1. Contact the Lincoln Electric
Service Department, 216-383-
2531 or 1-888-935-3877.
F-19
CTION