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WIRE DRIVE CONFIGURATION
(See Figure A.2)
CHANGING THE GUN RECEIVER BUSHING
WARNING
ELECTRIC SHOCK can kill.
•Turn the input power OFF at the welding power source before instal- lation or changing drive rolls and/or guides.
•Do not touch electrically live parts.
•When inching with the gun trigger, electrode and drive mechanism are "hot" to work and ground and could remain energized several sec- onds after the gun trigger is released.
•Do not operate with covers, panels or guards removed or open.
•Only qualified personnel should perform mainte- nance work.
Tools required:
• 1/4" hex key wrench.
Note: Some gun bushings do not require the use of the thumb screw.
1.Turn power off at the welding power source.
2.Remove the welding wire from the wire drive.
3.Remove the thumb screw from the wire drive.
4.Remove the welding gun from the wire drive.
5.Loosen the socket head cap screw that holds the connector bar against the gun bushing.
Important: Do not attempt to completely remove the socket head cap screw.
6.Remove the outer wire guide, and push the gun bushing out of the wire drive. Because of the pre- cision fit, light tapping may be required to remove the gun bushing.
7.Disconnect the shielding gas hose from the gun bushing, if required.
FIGURE A.2
8.Connect the shielding gas hose to the new gun bushing, if required.
9.Rotate the gun bushing until the thumb screw hole aligns with the thumb screw hole in the feed plate. Slide the gun receiver bushing into the wire drive and verify the thumb screw holes are aligned.
10.Tighten the socket head cap screw.
11.Insert the welding gun into the gun bushing and tighten the thumb screw.
PROCEDURE TO INSTALL DRIVE ROLLS AND WIRE GUIDES
WARNING
• Turn the input power OFF at the welding power source before instal- lation or changing drive rolls and/or guides.
•Do not touch electrically live parts.
•When inching with the gun trigger, electrode and drive mechanism are "hot" to work and ground and could remain energized several sec- onds after the gun trigger is released.
•Do not operate with covers, panels or guards removed or open.
•Only qualified personnel should perform mainte- nance work.
1.Turn power off at the welding power source.
2.Release the idle roll pressure arm.
3.Remove the outer wire guide by turning the knurled thumbscrews
4.Rotate the triangular lock and remove the drive rolls.
THUMB SCREW
GUN RECEIVER BUSHING
OUTER WIRE GUIDE
CONNECTOR BLOCK
SOCKET HEAD
CAP SCREW
LOOSEN TIGHTEN
5.Remove the inner wire guide.
6.Insert the new inner wire guide, groove side out, over the two locating pins in the feed plate.
7.Install a drive roll on each hub assembly secure with the triangular lock.
8.Install the outer wire guide by aligning it with the pins and tightening the knurled thumbscrews.
9.Close the idle arm and engage the idle roll pressure arm. Adjust the pressure appropriately.