Lincoln Electric K1723-1, Operator'S Manual

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FAST MATE GUNS SERIES
TROUBLESHOOTING
F-2
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED COURSE OF ACTION
Drive rolls turn, but wire will
not feed or wire feeding is
rough. a. Gun cable kinked and/or twisted. a. Keep as straight as possible.Inspect cable and
replace if necessary.
b. Wire jammed in gun and cable. b. Remove wire from gun and cable
– geed in new
wire. Note any obstruction. Replace liner if
necessary.
c. Incorrect drive rolls and guide tubes. c. Be sure the wire diameter being used is stamped
on drive rolls and guide tubes. Replace if
necessary.
d. Gun cable liner dirty. d. Clean liner or replace.
e. Worn drive rolls. e. Replace or reverse split drive roll type.
f. Electrode rusty and/or dirty. f. Replace the electrode if it is rusty.
g. Worn or improper size cable liner. g. Replace cable liner.
h. Partially flashed, melted or improper size
contact tip.
h. Replace the contact tip.
Variable or
“hunting” arc. a. Contact tip worn or incorrect size.
a. Replace contact tip.
b. Worn or undersize ground cables or poor
ground connections.
b. Inspect
– repair or replace as necessary.
c. Loose electrode connections. c. Be sure the following connections are tight:
electrode cable to wire feeder and power source,
work cable to power source and work, gun cable to
wire feeder contact block, gun nozzle to body and
contact tip to nozzle.
Poor arc striking with
sticking or
“blast-offs”, weld
porosity,narrow andropy
looking bead, or electrode
stubbing into plate while
welding.
a. Improper procedures or techniques. a. See
“Gas Metal Arc Welding Guide” (GS-100).
b. Improper gas shielding. b. Clean gascone.Makecertain thatgas diffuseris
not restricted. make certain that gas cylinder is not
empty orturned off.Makecertain gas solenoid
valve is operating and gas flow rate is proper.
Remove gun liner and check rubber seal for any
sign of deterioration or damage. Be sure set screw
in brass connector is in place and tightened
against the liner bushing.
Tip seizes in diffuser. a. Tip overheating due to prolonged or
excessive high current and/or duty cycle
welding.
a. Do not exceed current and duty cycle rating of gun.
A light application of high temperature antiseize
lubricant (such as Lincoln E2607 Graphite Grease)
may be applied to tip threads.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Lincoln Authorized Service Facility for technical troubleshooting assistance before you proceed.
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