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4-3. Changing Liner
1
Tools Needed:
4-4. Troubleshooting
Trouble
Gun tube assembly loose.
No weld output; gun/feeder does not
work.
Erratic weld output.
Pressing gun/feeder trigger does not en-
ergize welding power source; welding
wire is not energized; shielding gas does
not flow.
Wire feeds, shielding gas flows, but Secure control cable leads in welding power source (see Section 2-3).
welding wire is not energized.
Wire feeds erratically.
OM-1215 Page 14
3
2
Tighten nut at base of gun tube assembly.
Place Power switch on welding power source in the On position (see welding power source Owner's
Manual).
Tighten and clean all connections.
Secure plug from gun/feeder trigger cord into 4-socket receptacle on welding power source (see Sections
2-3).
See Troubleshooting section in welding power source Owner's Manual.
Check and correct drive roll pressure (see Section 2-4).
Clean or replace drive roll; clean or replace liner (see Sections 4-2 and 4-3).
Y Turn Off power at welding
power source first.
1
Nozzle
2
Contact Tip
3
Liner
Remove and replace liner.
Reinstall parts as shown.
Remedy
Ref. 802 576
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