16
17. Straighten the gun cable and pull the trig-
ger on the welding gun to feed the wire
through the gun assembly.
18. When at least an inch of wire sticks out past
the end of the gun, release the trigger.
19. Select a contact tip stamped with the same
diameter as the wire being used. If stamped
in metric see DESCRIPTION.
Note: Due to inherent variances in flux-cored
welding wire, it may be necessary to use a con-
tact tip one size larger than your flux core wire
if wire jams occur.
20. Slide the contact tip over the wire (protrud-
ing from the end of the gun). Thread the
contact tip into the end of the gun and
hand-tighten securely.
21. Install the nozzle on the gun assembly. For
best results, coat the inside of the nozzle
with anti-stick spray or gel.
22. Cut off the excess wire that extends past the
end of the nozzle.
SET THE WIRE DRIVE TENSION
WARNING
To reduce the risk of arc flash, make certain that
the wire coming out of the end of the gun does
not come in contact with work piece, ground
clamp or any grounded material during the
drive tension setting process or arcing will
occur.
1. Pull the trigger on the gun.
2. Turn the drive tension adjustment knob
clockwise, increasing the drive tension until
the wire seems to feed smoothly without
slipping.
When set correctly, there should be no slip-
page between the wire and the drive roller
under normal conditions. If an obstruction
occurs along the wire feed path, the wire
should then slip on the drive roller.
After the tension is properly adjusted, the
quick release drive tensioner may unlocked
and relocked and no radjustment of the
drive tension adjustment knob will be neces-
sary (unless the diameter or type of wire is
changed).
INSTALLING ALUMINIUM WIRE
Install aluminium wire the same as steel
wire, but with the following exceptions:
1. Install a plastic liner (PN PRT30900002) in
the welding gun.
2. Adjust the drive tension VERY carefully.
Aluminium wire is very sensitive to slight
changes in drive tension.
Note: For welding aluminium with this unit,
5356 alloy wire is recommended because of
its superior feedability. A plastic liner is need-
ed. When welding with softer aluminium
alloys, you may experience feed problems.
CHANGE POLARITY
This welder allows you to change the welding
current polarity. Select straight polarity for
welding with flux core wire (FCAW). Select
reverse polarity for MIG welding (GMAW) when
using mild steel, stainless steel or silicon bronze
wire. Reverse polarity is also suggested with
some flux core wire used in hard facing.
Change the polarity of your welder according
to the following procedure steps. Figure 8
shows what the polarity block should look like
for each polarity setting.
WARNING
Electric shock can kill! Always turn the power
OFF and unplug the power cord from the ac
power source before changing polarity.
CAUTION
Do not use a ratchet, crescent or other lever
type wrench to tighten knobs on the polarity
block. The nuts must be hand tightened only.
Too much torque applied to one of the knobs
could cause the knob to break off.
1. Remove the retaining knobs from the +
and - mounting posts on the Gas/No
Gas Board, located just below the drive
motor on the inside of your welder.
A. For Gasless (FCAW) welding, mount
the Ground Clamp ring terminal to
the “+” mounting post and the Torch
ring terminal to the “-” mounting post.
