Hobart Handler 140 Technical Manual page 21

Trouble
No weld output; wire feeds.
Low weld output.
Low or erratic wire speed.
Improper or no shielding gas flow.
Shielding gas flows continuously.
Handler 140
Connect work clamp to get good metal-to-metal contact.
Replace gun contact tip (see Section 8-5).
Check thumbscrew securing gun end to feedhead adapter and tighten if necessary.
Connect unit to proper input voltage or check for low line voltage.
Place Voltage switch S2 in desired position (see Section 5-1).
If using an extension cord, be sure that it is the proper size for the input voltage and amperage.
Readjust weld parameter settings.
Change to correct size drive roll.
Readjust drive roll pressure.
Clean or replace wire inlet guide or liner if dirty or plugged (see Section 8-4 and/or 8-6).
Readjust wire reel hub tension.
Check voltage and connections of wire drive motor. Replace motor if necessary.
Clean or replace gas hose.
Check shielding gas valve GS1 for proper coil voltage and connections. Check continuity of coil. Replace
GS1 if necessary.
Clear blockage in gun.
Replace contactor CR3.
Remedy
TM-258 267 Page 19