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B-2
OPERATION
B-2
The Lincoln warranty covers the Power Arc 4000
(excluding the engine) for 2 years from the date of
purchase. The engine is covered by the engine manu-
facturer’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 manu-
al.
WELDER
The POWER-ARC 4000 provides excellent constant
current AC welding output for stick (SMAW) welding.
For more details on using the machine as a welder,
see WELDING OPERATION in the OPERATION sec-
tion 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 genera-
tor or welding use. For welding, the same dial selects
continuous 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,
running, stopping, and breaking in the gasoline
engine.
DESIGN FEATURES AND
ADVANTAGES
• Stick welding (SMAW) process capability with out-
put range from 70 - 125 amps.
• Single-dial current output selection.
• Work and Electrode welding cable mounting termi-
nals.
• Separate ground stud for safe connection of case
to earth ground. Single 20 amp, 240 volt generator
receptacle.
• Duplex 20 amp, 120 volt generator receptacle.
• Integrated generator output overload protection
through two 20 amp circuit breakers.
• Welded-tube, full roll cage frame protects engine
and generator/welder.
• Lightweight, portable design.
• Rubber mounting isolates engine and generator
from frame to prevent machine “walking” during
use.
• Low noise engine muffler for quieter operation. (A
Super Lo-Tone
®
muffler is available for the Briggs &
Stratton 8 HP Kool Bore engine.)
• Easy-starting, No Maintenance, Electronic ignition.
• Low oil level engine shutdown protection is stan-
dard equipment on machines produced after
August 1998. On earlier engines an optional Oil
Gard® kit is available from Briggs & Stratton.
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.
LIMITATIONS
• The POWER-ARC 4000 is not recommended for
any processes besides those that are normally per-
formed using stick welding (SMAW) procedures.
• The POWER-ARC 4000 is not recommended for
pipe thawing.
• During welding, generator power is limited to 100
watts, and output voltages can drop from 120 to 80
volts and 240 to 160 volts. Therefore, DO NOT
OPERATE ANY SENSITIVE ELECTRICAL EQUIP-
MENT WHILE YOU ARE WELDING.
POWER-ARC 4000