Hobart Welding Products TM-944C manual Optional

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Item	Dia.	Part
No.	Mkgs.	No.	Description	Quantity
			Figure 9-1. Main Assembly (Continued)

. . . 41	. . . . . . . .	. 196 574	. . SWITCH, rocker DPST (230 VAC model)	. . . 1
. . . 42	. . . . . . . .	. 207 078	. . KNOB, pointer (WFS)	. . . 1
. . . 43	. . . . . . . .	. 207 079	. . KNOB, pointer (voltage)	. . . 1
. . . 44	. . . . . . . .	. 193 187	. . MOTOR, gear (115 VAC model Prior to LC175022 or
			230 VAC model Prior to LC155844)	. . . 1
. . . 44	. . . . . . . .	. 202 708	. . MOTOR, gear (115 VAC model Eff w/LC175022 or
			230 VAC model w/ LC155844)	. . . 1
. . . 45	. . . . . . . .	. 193 189	. . CONNECTOR, gun	. . . 1
. . . 46	. . . . . . . .	. 196 654	. . SCREW, thumb	. . . 1
. . . . . . . . . . . .	. . . . . . . .	. 203 081	. . SCREW, feed roll (115 VAC model Prior to LC175022 or
			230 VAC model Prior to LC155844)	. . . 1
. . . 47	. . . . . . . .	. 196 009	. . FITTING, gas barbed	. . . 1
. . . 48	. . . . . . . .	. 202 925	. . ROLL, feed .024 in, .030/.035 in	. . . 1
. . . 49	. . . . . . . .	. 194 508	. . HEAD, feed assy	. . . 1
. . . 50	. . . . . . . .	. 203 025	. . GUIDE, wire inlet	. . . 1
. . . 51	. . . . . . . .	. 209 228	. . LABEL, weld chart (115 VAC model)	. . . 1
. . . 51	. . . . . . . .	. 209 229	. . LABEL, weld chart (230 VAC model)	. . . 1
. . . 52	. . . . . . . .	. 204 711	. . LATCH	. . . 1
. . . . . . . . . . . .	. . . . . . .	♦212 492 . . REGULATOR/FLOWMETER, 10-50 CFH CO2		. . . 1

♦OPTIONAL

+When ordering a component originally displaying a precautionary label, the label should also be ordered.

To maintain the factory original performance of your equipment, use only Manufacturer’s Suggested Replacement Parts. Model and serial number required when ordering parts from your local distributor.

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TM-944 Page 44

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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