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4-3. Connecting Torch
A. Connecting Torch With One-Piece Cable
.
If applicable, install high-frequency unit.
Torch Without Gas Valve
Torch With Gas Valve
4
5
1
7
8
9
4
6
8
5
2
3
6
2
3
1
7
9
!
Turn Off welding power source
power before installing torch.
Obtain the following hose:
1
Gas Hose With 5/8-18 Right-
Hand Fittings
Connections:
2
Regulator/Flowmeter
3
Gas Cylinder
4
Welding Power Source
5
Gas Valve
Operating Torch Gas Valve:
Valve controls gas preflow and post-
flow. Open valve on torch just before
welding.
Preflow is used to purge the immedi-
ate weld area of atmosphere.
Postflow is required to cool tungsten
and weld, and to prevent contamina-
tion of tungsten and weld. After weld-
ing, leave valve open about 1 second
for every 10 amperes of weld current.
Close valve on torch when postflow is
finished.
6
One-Piece Torch Cable
7
Power Cable Adapter
Connect gas hose and power cable to
adapter before connecting adapter to
weld output terminal.
8
Work Clamp
Connect work clamp to clean, paint-
free location on workpiece, close to
weld.
Use wire brush to clean weld joint
area.
9
Foot Control
803 313-A
Tools Needed:
7/16, 11/16, 3/4 in.
OM-225 428 Page 9