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MAINTENANCE | ||
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COMPONENT
REPLACEMENT
PROCEDURES
CHANGING THE CONTACT TIP
1.Refer to Figure D.2. Remove the gas nozzle from the gun by unscrewing
2.Remove the existing contact tip from the gun by unscrewing
3.Insert and hand tighten desired contact tip.
4.Replace gas nozzle.
CHANGING DRIVE ROLL
The drive roll has two grooves; one for .023"
If .023"
1.Connect the machine to its rated input power per instructions in Installation section.
2.Release the
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
.023
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