OM-225 427 Page 6
3-3. Connecting Torch
A. Connecting Torch With One-Piece Cable
! 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
Tools Needed:
5/8, 7/8 in.
1
2
3
5
Torch Without Gas Valve
4
8
7
6
1
2
3
4
5
6
7
8
Torch With Gas Valve
9
9
If applicable, install high-frequency unit.
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