Harbor Freight Tools DUAL MIG 93793 - Manual (Page 25)

Page 25 For technical questions, please call 1-800-444-3353. SKU 93793
InSpectIOn, MaIntenance, anD cleanInG
Periodically open the Access Panel (31) 1.
from the unit and, using compressed
air, blow out all dust and debris from the
interior.
Always store the Welder in a clean, dry,
2.
safe location out of reach of children and
other unauthorized people.
For optimal weld quality, clean and
3.
inspect the Contact Tip (51b) and Nozzle
(51a) before each use, as follows:
nozzle Inspection, cleaning, and
replacement
Turn the Nozzle (51a) counterclockwise 1.
while pulling to remove.
Scrub the interior of the Nozzle (51a)
2.
clean with a wire brush.
Examine the end of the Nozzle (51a).
3.
The end should be flat and even. If the
end is uneven, chipped, melted, cracked,
or otherwise damaged, the Nozzle will
adversely effect the weld and should be
replaced.
Reinstall the Nozzle (51a) after
4.
inspecting and cleaning the Contact Tip
(51b).
contact tip Inspection, cleaning,
and replacement
Make sure the entire Welding Torch (51) 1.
is completely cool before proceeding.
Remove the Nozzle (51a) as explained 2.
above. Then remove the Contact Tip
(51b).
Scrub the exterior of the Contact Tip
3.
(51b) clean with a wire brush. Check
that the Contact Tip is the proper type for
the wire size used.
Examine the hole at the end of the
4.
Contact Tip (51b) for the following
problems:
Shape: The hole should be an even
circle, and should not be oblong or have
any bulges in it.
Size: The Contact Tip will decrease in
efficiency as the center hole enlarges. A
Contact Tip that measures 150% or more
the original size * should be replaced.
(*.045” or more for .030” tips; .035”
or more for .023 tips.)
If any problems are noted with a Contact
5.
Tip (51b), it is recommended to have it
replaced.
When inspection and maintenance is
6.
completed, reinstall the Contact Tip (51b)
and Nozzle (51a).
replacing the Welding torch liner
Switch welder off, disconnect power, and 1.
discharge electrode to ground before
proceeding.
Secure welding wire to the spool, cut it
2.
near the spool, and remove it from the
torch and cable.
WarnInG!
Before performing any maintenance on the Welder, unplug the
power cord (54) from its electrical outlet and allow all components of
the Welder to completely cool.