Routine Maintenance; Troubleshooting - Hobart H-9B Owner's Manual

5-6. Routine Maintenance

n = Check
* To be done by Factory Authorized Service Agent
Each
Spool
Of Wire
n~ Nozzle and contact tip
l Unreadable Labels
Every
3
Months
nl Cords

5-7. Troubleshooting

Trouble
Wire does not feed; wire is not ener-
gized; wire feeds unevenly.
Weld porosity.
Wire feeding stops or does not feed
properly during welding.
Z = Change ~ = Clean
~ Blow out gun casing
~ Weld Terminals
nl Gun Cables
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 5-4).
Remove weld spatter buildup in nozzle.
Make sure inner head tube is tight in cable connector.
Check shielding gas flow/supply.
Straighten gun cable and/or replace damaged parts (see Section 5-2 or 5-3).
Adjust drive roll pressure (see Section 3-5).
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).
!
Disconnect power
before maintaining.
l = Replace
l Damaged Gas Hose nl Weld Cables
Remedy
.
Maintain more often
during severe conditions.
Reference
OM-225 333 Page 15