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3. Start the four nuts on the four connecting posts and hand
snug each nut with the 7/16 nut driver. Do not use a
ratchet, crescent or other lever type wrench.
OPERATION
Operation of this welder consists of selecting and adjusting
operating controls for optimum voltage (welding heat) and wire
speed settings.
CONTROLS AND INDICATORS
WARNING
ELECTRIC SHOCK CAN KILL! To remove the risk of
electric shock, be aware that the VOLTAGE selector, when
OFF, does not remove power from all internal circuitry in the
welder. Whenever the VOLTAGE selector is in any position
except OFF, the welding circuit is activated. Under this
condition, an arc will occur if the welding wire or any part of
the welding circuit comes in contact with welding ground.
VOLTAGE SELECTOR – The voltage selector controls the
welding heat. The voltage selector is numbered 1–4. Number 1
is the lowest heat and number 4 the highest. Refer to the label
under the welder hood for recommended heat settings for your
welding job.
The position to the left of number 1 is the OFF position. In this
position, no power is provided to the welder – the drive motor
and welding power are turned off. However, as long as the
VOLTAGE selector is in one of the four numbered voltage
positions, welding circuit is HOT (there is voltage on the contact
tip).
WIRE SPEED CONTROL – The WIRE SPEED CONTROL
adjusts the speed at which the wire is fed out of the welding
gun. The wire speed needs to be closely matched ( tuned-in ) to
the rate at which it is being melted off (see TUNING IN THE
WIRE SPEED, ( in the Welding Instruction Guide ). Some things
that affect wire speed selection are the type and diameter of the
wire being used, the heat setting selected, and the welding
position to be used.
MAINTENANCE
GENERAL
This welder has been engineered to give many years of trouble-
free service providing that a few very simple steps are taken to
properly maintain it.
1. Keep the wire drive compartment lid closed at all times
unless the wire needs to be changed or the drive tension
needs adjusting.
2. Keep all consumables (contact tips, nozzles, and gun liner)
clean and replace when necessary. See CONSUMABLE
MAINTENANCE AND TROUBLESHOOTING later in this
section for detailed information.
3. Replace power cord, ground cable, ground clamp, or gun
assembly when damaged or worn.
4. Periodically clean dust, dirt, grease, etc. from your welder.
Every six months or as necessary, remove the side panels
from the welder and air-blow any dust and dirt that may
have accumulated inside the welder.
12
WARNING
ELECTRIC SHOCK CAN KILL! To reduce the risk of
electric shock, always unplug the welder from its ac power
source before removing side panels.
IT IS VERY IMPORTANT TO MAINTAIN THE CONSUMABLES
TO AVOID THE NEED FOR PREMATURE REPLACEMENT
OF THE GUN ASSEMBLY.
The GUN LINER is intended to provide an unrestricted path for
the welding wire to flow through the gun assembly. Over time it
will accumulate dust, dirt, and other debris. Replacement is
necessary when these accumulations begin to restrict the free
flow of wire through the gun assembly.
REPLACE A GUN LINER
When removing or installing a gun liner, care must be taken not
to kink or otherwise damage the gun liner or replacement will be
necessary. See Figure 9 for the drive assembly and Figure 10
for the gun assembly.
Drive
Drive
Tension
Tension
Adjustment
Arm
Inlet
Guide
Tube
Drive
Assembly
Figure 9. Drive Assembly
Live Wire
Terminal
Plastic
Cable Tie
Gun
Cable
Liner
Gas
Cable
Covering
Hose
(Tubing)
Switch
Switch
Contact
Contact
Wire
Wire
Handle
Switch
Case
Contact
Figure 10. Gun Assembly
Gun
Liner
1/4" Hex
Head Screws
Inlet Guide
Tube End
0.8
Strain
Phillips Pan
Relief
Head Screw
Clamp
Drive
Roller
Conductor
Gas
Tube Insulation
Valve
Gas
Hose
Conductor
Fitting
Tube
Gas
Diffuser
(has left hand
threads)
Internal Star
Lockwasher
Switch
Head End
Contact
Gun Liner
Gun
Assembly
(Tail End)
Contact
Tip
Nozzle
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