Operation - Lincoln Electric LN-23P Service Manual

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SAFETY PRECAUTIONS
WARNING
ELECTRIC SHOCK can kill.
• Do not touch electrically live parts
such as output terminals or internal
wiring.
• When inching with gun trigger, electrode and
drive mechanism are "hot" to work and ground
and could remain energized several seconds
after the gun trigger is released.
• Turn OFF input power at welding power source
before installation or changing drive roll and/or
guide tubes.
• Welding power source must be connected to
system ground per the National Electrical Code
or any applicable local codes.
• Only qualified personnel should perform this
installation.
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PRODUCT DESCRIPTION
The K316L-[ ] / LN-23P is an arc voltage powered,
lightweight, portable wire feed unit which includes cali-
brated wire speed control, voltage control, wire drive
with enclosed 14 lb. wire reel, analog voltmeter and
various input control and electrode cable lengths.
The LN-23P was designed specifically for Innershield
pipe welding, but, with the proper electrode, can be uti-
lized for general purpose welding.
The feeder is designed for welding with 14 pound coils
of .068 and 5/64 Innershield self-shielding electrodes
using a constant voltage type DC power Source. When
shipped, it is internally connected for welding with elec-
trode negative polarity (DC–). Depending upon which
gun and cable is used, its rating is either 350 amps or
250 amps at 60% duty cycle.
The wire speed control has a calibrated dial plate with
a range of 30 to 170 inches per minute which allows
quick and easy setting of the procedure wire feed
speed. The wire speed is not affected by changes in
the arc voltage setting even though the wire feed circuit
is powered by arc voltage. A two-position switch,
mounted on the gun provides a reduced speed circuit.
This allows selection of either the preset wire speed or
83% of the preset speed.
A low voltage gun trigger circuit turns both the power
source output and wire feed on and off. The gun trigger

OPERATION

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LN-23P
circuit is interlocked by a weld current sensing reed
switch so that while welding, the gun trigger switch
does not have to be held closed. The welding process
is stopped by pulling the gun away from the work. The
electrode remains cold until the gun trigger is operated
again.
The LN-23Pvoltage control is used to adjust the power
source output. Also included is an analog voltmeter
which allows easy setting of the arc voltage at the LN-
23P once the arc is established.
LOADING THE WIRE REEL
• Lay the LN-23P flat with the wire reel cover up,
unclip the rubber retaining strap, and remove the
cover.
• Remove the center clamping nut and the cover
plate from the wire reel.
• Unpack the 14-pound coil of wire. Be sure not to
bend the side tangs of the coil liner and straighten
any tangs that may have been bent.
• Place the coil on the wire reel so the coil will unwind
when it rotates in a clockwise direction.
• Remove the start end of the coil from its holding slot
in the coil liner, cut off the bent end, straighten the
first few inches and thread it through the wire feed
conduit connected to the wire enclosure until sever-
al inches of electrode are exposed. Be careful not to
release the electrode until it is through the wire feed
conduit; otherwise, it will unwind and tangle.
• Be sure all the lower tangs of the coil liner are flush
against the back half of the wire reel and that none
of the upper tangs are bent in against the coil.
• Replace the reel cover plate and the center clamp-
ing nut.
• Replace the cover of the wire reel enclosure and
clip the retaining strap in place.
• Pull about 2 feet of the exposed end of the elec-
trode through the wire feed conduit. Slide the insu-
lator all the way up on the wire feed conduit.
Make a single, free loop in the electrode and feed
the end into the section of wire feed conduit con-
nected to the gearbox. Press the gun trigger and
push the electrode into the drive rolls. Release the
electrode as soon as it is picked up by the drive
rolls. Continue feeding electrode until the excess
length is fed through the drive rolls. Watch the sin-
gle loop and guide it if necessary to make certain it
untwists without kinking. Do not feed electrode
through the gun cable at this time. Slide the insula-
tor down on wire feed conduit until it slips over sec-
tion of conduit connected to gearbox.
• Set the unit upright on floor, straighten the gun
cable, press the gun trigger, and feed electrode
through the gun and cable assembly.
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