Hobart Welding Products H-9A Gun Routine Maintenance, Each Spool Of Wire, Months, Troubleshooting

5-7. Routine Maintenance

	Y Turn Off welding power source before maintaining.
	Each Spool Of Wire
	Blow Out		Clean
			Nozzle
	Gun		And Check
	Casing		Contact Tip
	3 Months
Replace
Cracked	Control	Gas
Parts
	Cord	Hose	Gun Cable

5-8. Troubleshooting

	Trouble		Remedy
Wire does not feed; wire is not ener-		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		Straighten gun cable and/or replace damaged parts (see Section 5-2or 5-3).
properly during welding.
		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 5-2or 5-3).
		Replace drive roll or pressure bearing if worn or slipping (see welding power source manual).

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