Hobart Welding Products TM-944C manual Cleaning Or Replacing Gun Liner, Disconnect gun from unit

Page 34

7-6. Cleaning Or Replacing Gun Liner

Tools Needed:

Y Disconnect gun from unit.

8 mm / 10mm

	Remove nozzle, contact tip,
	adapter, gas diffuser, and wire
Head Tube	outlet guide.
Head Tube

8 mm

10 mm

Remove liner.

Lay gun cable out straight before installing new liner.

		To Reassemble Gun:
		Insert new liner.
		Install wire outlet guide so that 1/8
		in (3 mm) of liner sticks out. Hand
		tighten outlet guide, and then tight-
	Blow out gun casing.	en two full turns more.
	Blow out gun casing.	Cut liner off so that 3/4 in (19 mm)
		Cut liner off so that 3/4 in (19 mm)
		sticks out of head tube.
		Install gas diffuser, adapter, contact
		tip, and nozzle.

Ref. 802 446

TM-944 Page 32

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Image 34

Contents Processes TM-944CDescription Table of Contents Symbol Usage − Safety Precautions for ServicingServicing Hazards Radiation can cause interference California Proposition 65 WarningsEMF Information Overuse can cause OverheatingSpecifications − SpecificationsVAC Model Duty Cycle % Duty Cycle And OverheatingOutput Output AmperesVolt-Ampere Curves − Installation Installing Welding Gun Installing Work ClampProcess/Polarity Table Electrode Negative For Flux Core WireFor Solid Wire Changing PolarityInstalling Gas Supply Volt, 20 ampere individual Rating LabelGrounded Receptacle Up to 200 ft 61 m= GND/PE Do not move or operate unit where it could tip18 in 457 mm of space for airflow L2 L1 230 VAC230 Electrical Service Guide For 230 VAC ModelInstalling Wire Spool And Adjusting Hub Tension Reference 1996 National Electrical Code NECBe sure that tip matches wire diameter Threading Welding WirePressure Indicator Scale Reinstall contact tip and nozzle− Operation Voltage SwitchPower Switch ControlsWeld Parameter Chart For 115 VAC Model Electrode Positive For Solid Wire Starting Value only − Wire Speed Setting Can beWire Speed Also Depends on Other variables Such Stick Out WhileWeld Parameter Chart For 230 VAC Model Listed Starting Value Only − Wire Speed Setting can be Metal Etc− Theory of Operation Main Block Wire Drive MotorStablizer L1 Polarity− Troubleshooting Troubleshooting TableGS1 if necessary Clear blockage in gunV8/R5 V9/R6 V10 V11/R9 TM-944Or Flux Core 030/.035 Solid585 640Test Equipment Needed Handler 135600 510700 Control Board PC1 Testing Information 115 VAC Model Control Board PC1 Test Point Values 115 VAC Model Circuit commonControl Board PC1 Testing Information 230 VAC Model Control Board PC1 Test Point Values 230 VAC Model Disconnect power before maintaining − MaintenanceRoutine Maintenance Overload Protection Drive Motor ProtectionTurn Off power before replacing contact tip Changing Drive Roll Or Wire Inlet GuideReplacing Gun Contact Tip Disconnect gun from unit Cleaning Or Replacing Gun LinerTo Reassemble Gun Replacing Switch And/Or Head Tube − Electrical Diagrams Model Serial Or Style Number Circuit Diagram Wiring Diagram194 324-C 194 325-A 196 637-A 196 655-A 195 890-A 195 891-A Handler 135 H-10 Gun − Parts List 11 10Dia Part Mkgs Description Quantity Optional Options Optional Drive Rolls195 Hobart Welding Products