Hobart Welding Products H100S4-10, Owner'S Manual

Page: 11 / 16

OM-245987 Page 9
5-3. Routine Maintenance
!
Disconnect power
before maintaining.
.
Maintain more often
during severe conditions.
n = Check Z = Change ~ = Clean l = Replace
* To be done by Factory Authorized Service Agent
Reference
Each
Spool
Of Wire
n~ Nozzle and contact tip ~ Blow out gun casing
Every
3
Months
l Unreadable Labels l Damaged Gas Hose nl Cords nl Cracked Parts
5-4. Troubleshooting
Trouble Remedy
Wire does not feed; wire is not ener-
gized; wire feeds unevenly.
Check contact tip. Check for kinks in gun cable and liner.
Check gun trigger plug connection at welding power source/wire feeder.
Check, and if necessary, replace gun trigger switch (see Section 5-2).
Check contact tip. Check for kinks in gun cable. Blow out liner and gun casing (see Section 5-1).
Weld porosity. Remove weld spatter buildup in nozzle.
Check O-rings on gun connector and replace if damaged.
Make sure inner head tube is tight in cable connector.
Check gun connector to be sure it is fully inserted into drive assembly.
Check shielding gas flow/supply.
Wire feeding stops or does not feed
properly during welding.
Straighten gun cable and/or replace damaged parts (see Section 5-1).
Adjust drive roll pressure (see wire feeder manual).
Change to proper drive roll groove (see wire feeder manual).
Readjust hub tension (see wire feeder manual).
Clean or replace liner if dirty or plugged (see Section 5-1).
Replace drive roll or pressure bearing if worn or slipping (see wire feeder manual).