Longevity MigWeld 140 Operating Manual page 22

2. Pull out the welding wire ○
from unwinding, maintain tension on the wire until after Step 5.
3. Cut off the starting end of the welding wire from the wire spool and straighten the lead
section of wire from the spool approximately 4" (100mm) long.
4. Thread the welding wire through and into the hole ○
over the wire drive roll ○
Push the wire into the tailpiece of the gun approximately 6 inches.
5. Place the idle roll arm back to the operating position ○
pressure arm ○
1
Protective Gas Installation
Compressed gas cylinder containing mixed gas of, 75% Argon and 25% CO
when using the MIG (GMAW - GAS Metal Arc Welding). The flow regulator and supply
hose is included with your welder. The compressed gas can be obtained from your local
welding suppler.
1. Fix the compressed gas cylinder with a chain, or other method to the wall or other
securing device, to prevent the cylinder of falling.
2. After securing, remove cylinder cap if there is one on your cylinder.
3. Install flow regulator (CGA-580) to the supply valve on the cylinder and tighten with
wrench.
4. Install one end of the gas supply hose into the outlet of the flow regulator and tighten.
Connect the other end of the hose to the gas inlet located at the rear of the MigWeld140
welding machine (The connector nipple 5/8-18 adapts to CGA-032). Ensure that the hose
has no twisting or knotting.
5. Slowly turn on the gas cylinder valve.
6. Depress gun trigger switch and adjust the flow regulator to 25-30 cubic ft per hour (CFH),
(12-14 l/min).
7. Shut off the valve of the gas cylinder. Depress gun trigger to release the gas in system.
Power off MigWeld140, when welding process is finished.
8. NOTE: Always keep the valve of the gas cylinder closed when not in use.
MigWeld 140 140 AMP MIG Welder
from the welding wire spool carefully; To prevent the spool
3
and into the hole ○
5
of the wire feeder.
2
5
6
Figure D-3
of the inlet guide tube, threading it
4
of the outlet guide tube on the gun side.
6
and reset the spring loaded
2
1
3
4
should be used
2
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