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B-1
OPERATION
B-1
LF-72
COLD FEED
POSITIVE OUTPUT
NEGATIVE OUTPUT
PROTECTIVE
GROUND
WARNING OR
CAUTION
DANGEROUS
VOLTAGE
SHOCK
HAZARD
WELDING
FUMES
EXPLOSION
GAS INPUT
WORK
CONNECTION
SAFETY PRECAUTIONS
Read this entire section of operating instructions
before operating the machine.
ELECTRIC SHOCK can kill.
• Unless using cold feed feature,
when feeding with the gun trigger,
the electrode and drive mechanism
are always electrically energized
and could remain energized several
seconds after welding ceases.
• Do not touch electrically live parts or electrodes
with your skin or wet clothing.
• Insulate yourself from the work and ground.
• Always wear dry insulating gloves.
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ONLY QUALIFIED PERSONS SHOULD INSTALL,
USE OR SERVICE THIS EQUIPMENT. READ AND
FOLLOW THE MANUFACTURER’S INSTRUC-
TIONS, EMPLOYER’S SAFETY PRACTICES AND
MATERIAL SAFETY DATA SHEETS (MSDS) FOR
CONSUMABLES.
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READ THIS WARNING, PROTECT YOURSELF &
OTHERS.
FUMES AND GASES can be dangerous.
• Keep your head out of fumes.
• Use ventilation or exhaust at the
arc, or both,to keep fumes and
gases from your breathing zone and
general area.
WELDING SPARKS can cause fire or
explosion.
• Do not weld near flammable material.
• Do not weld on containers which have
held flammable material.
ARC RAYS can burn.
• Wear eye, ear, and body protection.
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Observe additional guidelines detailed in the
beginning of this manual.
WARNING
GRAPHIC SYMBOLS THAT APPEAR ON
THIS MACHINE OR IN THIS MANUAL
The serviceability of a product or structure utilizing
the LF-72 wire feeder is and must be the sole
responsibility of the builder/user. Many variables
beyond the control of The Lincoln Electric Company
affect the results obtained in using the LF-72 wire
feeder. These variables include, but are not limited
to, welding procedure, plate chemistry and tempera-
ture, weldment design, fabrication methods and ser-
vice requirements. The available range of the LF-72
wire feeder may not be suitable for all applications,
and the builder/user is and must be solely responsi-
ble for welding settings.