MAINTENANCE | ||
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DRIVE ROLLS AND GUIDE TUBES
After every coil of wire, inspect the wire drive mecha- nism. Clean it as necessary by blowing with low pres- sure compressed air. Do not use solvents for cleaning the idle roll because it may wash the lubricant out of the bearing. All drive rolls are stamped with the wire sizes they will feed. If a wire size other than that stamped on the roll is used, the drive roll must be changed.
CABLE CLEANING
Clean the cable liner after using approximately 300 pounds (136 kg) of electrode.
1.Remove the cable from the wire feeder and lay it out straight on the floor.
2.Remove the contact tip from the gun.
3.With an air hose at the gas diffuser end, use low pressure to gently blow out the cable liner.
CONTACT TIP AND GAS NOZZLE INSTALLATION
1.Choose the correct size contact tip for the elec- trode being used (wire size is stenciled on the side of the contact tip) and screw it snugly into the gas diffuser.
a.Be sure the nozzle insulator is fully screwed onto the gun tube and does not block the gas holes in the diffuser.
2.Slip or screw the appropriate gas nozzle onto the nozzle insulator.
Note: Either a standard .50" (12.7mm) or optional .62" (15.9mm) I.D.
3.Adjust the gas nozzle as appropriate for the GMAW process to be used.
a.Typically, the contact tip end should be flush to extended .12" (3.2mm) for the
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CAUTION
Excessive pressure at the start may cause the dirt to form a plug.
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4.Flex the cable over its entire length and again blow out the cable.
5.Repeat this procedure until no more dirt comes out.
GUN TUBES AND NOZZLES
1.Replace worn contact tips as required.
2.Remove spatter from the inside of the gas nozzle and tip every 10 minutes of arc time or as required.
