Fronius MTG 400i K4, Operating Instructions Manual

Page: 39 / 148

Service, maintenance and disposal
General Regular and preventive maintenance of the welding torch are important factors in achie-
ving problem-free operation. The welding torch is subjected to high temperatures and
high levels of soiling. This is why the welding torch needs more frequent maintenance
than other components of the welding system.
CAUTION!
Risk of damage due to improper hand-
ling of the welding torch.
Serious damage may result.
▶
Do not hit the welding torch on hard
objects.
▶
Avoid scoring and scratches in the
contact tip, in which the welding spat-
ter could permanently solidify.
▶
Do not bend the torch body under any
circumstances!
Identifying defec-
tive wearing parts
1. 2. 3. 4. 5.
1. Insulating parts
-
Burnt outer edges, notches
2. Nozzle fittings
-
Burnt outer edges, notches
- Heavily coated with welding spatter
3. Spatter guard
-
Burnt outer edges, notches
4. Contact tips
-
Ground (oval) wire entry and wire exit bores
- Heavily coated with welding spatter
- Penetration at the tip of the contact tip
5. Gas nozzles
-
Heavily coated with welding spatter
- Burnt outer edges
- Notches
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