Routine Maintenance; Troubleshooting - Hobart Welding Products H-9A Gun Owner's Manual

5-7. Routine Maintenance

Replace
Cracked
Parts

5-8. Troubleshooting

Trouble
Wire does not feed; wire is not ener-
gized; wire feeds unevenly. gized; wire feeds unevenly
Weld porosity.
Wire feeding stops or does not feed
properly during welding.
OM-952 Page 14
Y Turn Off welding power source before maintaining.
Each Spool Of Wire
Blow Out
Gun
Casing
3 Months
Control
Cord
Check contact tip. Check for kinks in gun cable.
Check contact tip. Check for kinks in gun cable. Blow out gun liner (see Section 5-2).
Check for secure gun trigger lead connections at PC1 (see Section 3-3).
Check, and if necessary, replace gun trigger switch (see Section 5-5).
Remove weld spatter buildup in nozzle.
Make sure inner head tube is tight in cable connector.
Check shielding gas flow/supply.
Replace liner O-ring (see Section 5-4).
Straighten gun cable and/or replace damaged parts (see Section 5-2 or 5-3).
Adjust drive roll pressure (see Section 3-4).
Change to proper drive roll groove (see welding power source manual).
Readjust hub tension (see weld power source manual).
Clean or replace liner if dirty or plugged (see Section 5-2 or 5-3).
Replace drive roll or pressure bearing if worn or slipping (see welding power source manual).
Clean
Nozzle
And Check
Contact Tip
Gas
Hose
Remedy
Gun Cable