Making A Weld; Wire Loading - 13-14 Lb Innershield Coils - Lincoln LN-742 Service Manual

B-12
FEEDING ELECTRODE
1. Turn the reel until the free end of the electrode is
accessible.
2. While tightly holding the electrode, cut off the bent
end and straighten the first six inches. Cut off the
first inch. (If the electrode is not properly
straightened, it may not feed or may not go into
the outgoing guide tube causing a "birdnest".)
3. Insert the free end through the incoming guide
tube.
4. Press the cold inch key gun trigger and push the
electrode into the drive roll.
WARNING
ELECTRIC SHOCK
can kill.
• Do not touch electrically live parts
such as output terminals or
internal wiring.
• When inching with the gun trigger,
electrode and drive mechanism
are "hot" to work and ground and
could remain "hot" for several
seconds after the gun trigger is
released.
5. Inch the electrode through the gun.
WIRE LOADING – 13-14 LB INNERSHIELD
COILS
The K378 small mounting stand for the 14 lb
Innershield coil does not have an adjustable brake. It
has a fixed drag built into the reel spindle.
To load a 14 lb coil:
1. Remove the snap-on lid from the plastic canister.
2. Remove the center clamping nut and the cover
plate from the wire reel.
OPERATION
3. Unpack the 14 lb coil of wire. Be sure not to bend
the side tangs of the liner. Straighten any tangs
that may have been bent.
4. Remove the start end of the coil from its holding
slot in the coil liner. Cut off the bent end,
straighten the first six inches, and cut off the first
inch. (If the electrode is not properly straightened,
it may not feed or may not enter the outgoing
tube, causing a "birdnest".)
5. Thread the end through the canister wire feed
liner until about four inches of electrode are
exposed.
6. Place the coil onto the disc support.
7. Replace the front reel cover and center clamping
nut. Keep the reel from turning and tighten the
center clamping nut securely.
8. Thread the exposed end of the electrode into the
wire feeder until it touches the drive rolls. Press
the cold inch key or the gun trigger and feed the
electrode through the system.

MAKING A WELD

1. Use only constant voltage power type sources. If
using a multiple process power source, be sure it
is set for constant voltage output per instructions
in the manual for the power source.
2. Set the power source polarity switch or properly
connect the electrodes and work leads for the
correct electrode polarity.
3. Set the voltage using the control on the power
source or, if used, the optional K589-1 Remote Kit
or K857 Remote Voltage Control. Set the open
circuit voltage to approximately 2 volts higher than
the desired procedure voltage. The final setting
must be made according to the arc voltage while
welding.
4. Use the Mode Selection key to set the desired
operating mode.
5. Use the Function Selection key and Selection
Setting arrow keys to set the desired Inch and
Weld Feed speeds.
LN-742 & LN-742H
B-12