Tweco 190 MIG Thermal Arc Fabricator - Manual (Page 41)

FABRICATOR 190 WELDING MACHINE
Manual No. 0-4838 4-5 OPERATION
TWECO MIG guns may be fitted to many different types
of MIG welding Power Supplies so that your whole shop
can be converted to TWECO. Not only will this give greater
reliability (and hence greater productivity) but it will
reduce stockholding of consumable parts.
Contact your Thermal Arc distributor to order TWECO
replacement parts, options and accessories. For
assistance in locating a Thermal Arc distributor, contact
the Thermadyne office listed in the inside rear cover that
is nearest to you.
Gun Consumable Parts
Refer to the appendix section of this manual for the list
of consumable items, including nozzles, contact tips, gas
diffusers and conductor tubes.
4.04 Installing A New Wire Conduit
Removal
1. Be sure the MIG gun cable is arranged in a straight
line and free from twists when installing or removing
a wire conduit.
2. Unscrew and remove the MIG Gun Nozzle and Contact Tip
using a pair of slip-joint pliers. Remove the Insulator.
3. Unscrew the Gas Diffuser from the Conductor Tube
using a 7/16-inch (11mm) open end wrench across
the flats.
4. Loosen the allen screw in the Connector Plug using a
5/64-in. allen wrench and pull the old Wire Conduit
out of the cable assembly from the connector plug
end.
Installation
1. Inspect the two O-ring gas seals on the Connector Plug
for cuts or damage.
2 Start from the Connector Plug end of the assembly
and begin pushing the Wire Conduit through the
Connector Plug, cable assembly and into the gun. If
the Wire Conduit should lodge along the way, gently
whip or work the cable assembly to aid forward
movement.
3. When the Wire Conduit stop meets the end of the
Connector Plug and the new raw end extends through
the end of the Conductor Tube on the welding gun, the
allen screw in the Connector Plug must be securely
tightened onto the Wire Conduit to prevent its backward
movement.
NOTE
When the Wire Conduit is fully inserted into
the cable assembly and the conduit stop is
firmly against the Connector Plug, the “raw
end” of the Wire Conduit will protrude out of
the open end of the gun Conductor Tube. Trim
the Wire Conduit as shown in Figure 4-5. The
trimmed end which seats in the Gas Diffuser
must be filed and reamed smooth on the inside
and outside radii so wire feed will not be
obstructed.