Hobart Welding Products H-9A Gun - Manual (Page 18)

OM-952 Page 14
5-7. Routine Maintenance
Y Turn Off welding power source before maintaining.
Each Spool Of Wire
Blow Out
Gun
Casing
Clean
Nozzle
And Check
Contact Tip
3 Months
Control
Cord
Gas
Hose
Gun Cable
Replace
Cracked
Parts
5-8. Troubleshooting
Trouble Remedy
Wire does not feed; wire is not ener-
gized; wire feeds unevenly
Check contact tip. Check for kinks in gun cable.
gized; wire feeds unevenly.
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).
Weld porosity. 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).
Wire feeding stops or does not feed
properly during welding.
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).