OPERATION |
WIRE DRIVE CONFIGURATION
(See Figure B.2b)
Changing the Gun Receiver Bushing
ELECTRIC SHOCK can kill.
•Turn the input power OFF at the welding power source before installation 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 seconds after the gun trigger is released.
•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.
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.
COLD FEED/GAS PURGE SWITCH
Cold Feed and Gas Purge are combined into a single spring centered toggle switch.
To activate Cold Feeding, hold the switch in the UP position. The wire drive will feed electrode but neither the power source nor the gas solenoid will be energized. Adjust the speed of cold feeding by rotat- ing the WFS knob. Cold feeding, or "cold inching" the electrode is useful for thread- ing the electrode through the gun.
FIGURE B.2b
THUMB SCREW
GUN RECEIVER BUSHING
OUTER WIRE GUIDE
CONNECTOR BLOCK
SOCKET HEAD
CAP SCREW
LOOSEN TIGHTEN