Tweco Spray Master Series, Safety And Operating Instructions Manual, Page: 21 / 36

SAFETY AND OPERATING INSTRUCTIONS
15 89200009
SECTION 7: WIRE CONDUIT REPLACEMENT
7.01 CONDUIT IDENTIFICATION
The procedure for removal and installation of a wire conduit is similar for all TWECO MIG guns. Conduits may be identified
by the type of conduit stop and the part number marking on each conduit stop.
Example Part Number:
44-116-15
44 Series
1/16" (1,6mm) Wire Capacity
Liner length in feet
7.02 CONDUIT REMOVAL
1. Lay the MIG gun out on a table or on the floor in a straight line. Make sure the gun is fully extended and
all twists in the cable are removed.
2. Remove the nozzle and loosen the conduit set screw in the front of the gun. This is usually located in
the diffuser, or at the front of the handle. Then loosen the conduit set screw in the rear connector plug.
NOTE!
On Miller® Direct Plug MIG guns, remove the nipple on the end of the connector plug. On
Euro-Kwik connections, remove the conduit retaining cap.
3. Remove the diffuser and contact tip.
4. Grip the conduit stop and remove the conduit with a twisting motion. On Miller
®
Direct Plug MIG guns,
twisting the rear of the gun approximately one revolution clockwise will raise the conduit stop out of
the connector plug recess.
7.03 CONDUIT INSTALLATION
1. Uncoil the conduit and lay it in a straight line. Insert the conduit into the rear connector plug. Push the conduit
into the gun with short strokes. If the conduit hangs up, twist the conduit counterclockwise or gently whip the
cable while applying pressure to the conduit.
2. The conduit liner will need to be cut to length. This can be done by cutting the conduit to match the one
removed or inserting the new liner through the MIG gun and trimming the conduit extending from the
conductor tube to the appropriate length noted in the following chart.
3. When the conduit is completely in the gun, tighten the rear conduit set screw. On Miller
®
guns, reinstall the
nipple. On Euro-Kwik guns, reinstall the conduit retaining cap.
Conduit Cut Lengths
250 amp = 1.125"
(28.6 mm)
350 amp = 1.25"
(28.6 mm)
450 amp = 0.5"
(12.7 mm)
4. File the cut conduit end to remove burrs because they could interfere with wire feeding or catch on the
diffuser.
5. Replace the diffuser and contact tip and tighten the nozzle.
The MIG gun is now ready to be reinstalled on the feeder.