Lincoln Electric IM794 manual Component Replacement Procedures, Changing the Contact TIP

Page 25

D-3

MAINTENANCE

D-3

COMPONENT

REPLACEMENT

PROCEDURES

CHANGING THE CONTACT TIP

1.Refer to Figure D.2. Remove the gas nozzle from the gun by unscrewing counter-clockwise.

2.Remove the existing contact tip from the gun by unscrewing counter-clockwise.

3.Insert and hand tighten desired contact tip.

4.Replace gas nozzle.

CHANGING DRIVE ROLL

The drive roll Item 1, has two grooves; one for .023" –

.025" (0.6 mm) solid steel electrode and a larger groove for .030" (0.8 mm) solid and .035" (0.9 mm) flux-cored steel electrode. As shipped, the drive roll is installed in the .023"-.025" (0.6 mm) position.

If .030"/.035" (0.8/0.9 mm) wire is to be used, the drive roll must be reversed as follows:

1.Connect the machine to its rated input power per instructions in Installation section.

2.Release the spring-loaded idle arm tensioner,Item 2, and lift the idle roll arm, Item 3, away from the drive roll, Item 1. (See Figure D.1)

3.Turn the power switch to ON (marked “I”).

4.Set the wire speed to minimum and jog the drive unit with the trigger switch until the drive roll set screw is facing up.

CAUTION

When inching the welding wire, the drive rolls, gun connector block, and gun contact tip are energized relative to work and ground and remain energized for several seconds after the gun trig- ger is released.

5.Turn the power switch to OFF (marked “O”).

6.Loosen the drive roll set screw with the 5/64" (2.0 mm) hex wrench supplied.

7.Remove the drive roll, flip over and reinstall with the

.030/.035" (0.8/0.9 mm) groove (the larger groove) closest to the gearbox.

8.Push a length of straightened welding wire through the wire feeder guide tubes and adjust the position of the drive roll so that the groove is centered on the wire. Make certain the set screw is located on the flat portion of the shaft and tighten.

FIGURE D.1

3

2

1

SP-170T

Page 24 Page 26
Image 25
Page 24 Page 26
Contents SP-170T California Proposition 65 Warnings SafetyElectric Shock can kill Iii Welding Sparks can cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE SûretéOn-Line Product Registration Please Examine Carton and Equipment For Damage ImmediatelyTable of Contents Technical Specifications SP-170T InstallationIdentify and Locate Components Safety PrecautionsSelect Suitable Location Work Clamp InstallationOutput Connections StackingWork Cable Installation GUN InstallationConnecting Gun Cable to the SP-170T GAS ConnectionFigure A.5 Input ConnectionsElectrical Input Connection for Rated Output Line Cord ConnectionVolt Input Connection Design Features Advantages Saftey PrecautionsOperation General DescriptionWelding Capability Controls and SettingsLimitations Welding Operations Wire LoadingSequence of Operation Wire Threading Friction Brake AdjustmentsProcess Guidelines Cleaning Tip And NozzleMaking a Weld Welding with Gmaw MIG Changing Machine Over to Feed Other Wire SizesOverload Protection Application Chart Optional Accessories AccessoriesK586-1 Deluxe Adjustable Gas Regulator & Hose Kit K549-1 .035 0.9 mm Innershield Welding KitFactory installed gun liner will feed .025-.035 0.6-0.9mm Replacement PartsInnershield Fcaw Conversion Maintenance Safety Precautions MaintenanceRoutine Maintenance Configuration of Components in Wire Feeding System GUN and Cable MaintenanceFor Magnum 100L GUN Contact Tip Cable Liner Drive RollChanging the Contact TIP Component Replacement ProceduresChanging Drive Roll Liner trim length Changing LinerFigure D.3 GUN Handle PartsHOW to USE Troubleshooting Guide TroubleshootingRecommended Course of Action Problems Possible Symptoms CauseFeeding Problems Welding Problems Wiring Diagrams SP-170T Precaucion Warnung
Top Page Image Contents