Lincoln Electric IM751 POWER-ARC 4000 - Manual (Page 16)

B-1 OPERATION B-1
SAFETY INSTRUCTIONS
Read and understand this entire section before oper-
ating your POWER-ARC 4000.
Do not attempt to use this equipment until you
have thoroughly read all the operation and main-
tenance manuals supplied with your machine.
They include important safety precautions;
detailed engine starting, operating, and mainte-
nance instructions; and parts lists.
ELECTRIC SHOCK can kill.
• 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.
FUMES AND GASES can be
dangerous.
• Keep your head out of fumes.
• Use ventilation or exhaust to
remove fumes from breathing zone.
WELDING SPARKS can cause
fire or explosion.
• Keep flammable material away.
• Do not weld on containers that have
held combustibles.
ARC RAYS can burn.
• Wear eye, ear, and body protection.
ENGINE EXHAUST can kill.
• Use in open, well ventilated areas or
vent exhaust to the outside.
• Do not stack anything on or near
the engine.
MOVING PARTS can injure.
• Do not operate this equipment with
any of its doors open or guards off.
• Stop the engine before servicing it.
• Keep away from moving parts.
Only qualified personnel should install, use, or ser-
vice this equipment.
GENERAL DESCRIPTION
The POWER-ARC 4000 is a generator/welder designed
for home use and other non-commercial applications.
As a generator it can supply up to 4,000 continuous
watts (or 4,400 surge watts) of 120/240 volt, single-
phase AC power. As a welder it provides 125 amps of
AC constant current for welding with AC stick elec-
trodes. A single dial provides continuous adjustment of
welding output. The machine is lightweight, portable,
and can be lifted by two people.
The Lincoln warranty covers the Power-Arc 4000
(excluding the engine) for 2 years from the date of pur-
chase. The engine is covered by the engine manufactur-
er’s warranty policy.
RECOMMENDED APPLICATIONS
GENERATOR
The POWER-ARC 4000 gives AC generator output for
medium use, non-commercial demands. For more
details on operating the generator, see GENERATOR
OPERATION in the OPERATION section of this manual.
WELDER
The POWER-ARC 4000 provides excellent constant cur-
rent AC welding output for stick (SMAW) welding. For
more details on using the machine as a welder, see
WELDING OPERATION in the OPERATION section of
this manual.
OPERATIONAL FEATURES AND
CONTROLS
The POWER-ARC 4000 was designed for simplicity.
Therefore, it has very few operating controls. A single
dial on the control panel lets you select either generator
or welding use. For welding, the same dial selects con-
tinuous current output over the machine’s 70 to 125
amp range.
The gasoline engine controls include a recoil starter,
choke, and rotary stop switch. See ENGINE OPERA-
TION in the OPERATION section of this manual and the
engine owner’s manual for details about starting, run-
ning, stopping, and breaking in the gasoline engine.
WELDING CAPABILITY
The POWER-ARC 4000 is rated 125 amps, 20 volts at
30% duty cycle on a ten-minute basis. This means
that you can load the welder to 125 amps for three
minutes out of every ten-minute period. The machine
is also capable of higher duty cycles at lower output
currents. You can load the welder to 100 amps for six
minutes out of ten for a 60% duty cycle.
The current is continuously variable from 70 to 125
amps AC. The POWER-ARC 4000 can weld with all
3/32 and most 1/8 inch diameter Lincoln AC elec-
trodes.
POWER-ARC 4000
WARNING