WIDMANN MIG/TIG/MMA-160 Manuel Utilisateur page 10

Cleaning the wire guide
Pressure of the feed rolls removes metal dust from the filler wire's surface which then
finds its way to the wire guide. If the wire guide is not clean, it gradually clogs up and
causes wire feed malfunctions. Clean the wire guide in the following manner:
1. Remove the welding gun's gas nozzle, contact tip and contact tip's adapter.
2. With a pneumatic pistol, blow compressed air though the wire guide.
3. Blow the wire feed mechanism and reel housing clean with compressed air.
4. Reattach the welding gun's parts, tighten the contact tip and contact tip's adapter to
spanner tightness.
Changing the wire guide
If the wire guide is too worn or totally clogged, change it to a new one according to
the following instructions:
1. Disconnect the welding gun from the machine.
a. Disconnect the cable clamp of the gun's power cable by opening the screws.
b. Disconnect the gun's power cable from the machine's pole.
c. Disconnect the connector of the trigger conductors from the machine.
d. Open the gun's mounting nut.
e. Extract the gun gently from the machine whereupon all parts come through the
front part's cable hole.
2. Open the mounting nut of the wire guide which exposes the end of the wire
guide.
3. Straighten the welding gun's cable and withdraw the wire guide from the gun.
4. Push a new wire guide in to the gun. Make sure that the wire guide enters all the
way into the contact tip's adapter and that there is an O-ring at the machine-end of the
guide.
5. Tighten the wire guide in place with the mounting nut.
6. Cut the wire guide 2 mm from the mounting nut and file the sharp edges of the cut
round.
7. Reattach the gun in place and tighten the parts to spanner tightness.
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