Lincoln Electric 300FM, 400FM manual GUN Tubes and Nozzles, GUN Cables

D-2 MAINTENANCE D-2

CAUTION

This screw should only be gently tightened. Overtightening will split or collapse the liner and cause poor wire feeding.

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6. Replace the nozzle insulator and gas nozzle.

GUN TUBES AND NOZZLES

a.Replace worn contact tips as required.

b.Remove spatter from inside of gas nozzle and from tip after each 10 minutes of arc time or as required.

c.To remove gun tube from gun, loosen socket-head clamping screw in handle with 3/16” (4.8 mm) Allen wrench. Remove gas nozzle and nozzle insulator and also loosen small set screw in the diffuser using 5/64” (2.0 mm) Allen wrench.

NOTE: Small set screw in the diffuser must be loos- ened, otherwise liner could be damaged when attempting to remove gun tube.

Pull gun tube out from gun handle. To reinstall, insert the gun tube, push in as far as possible and retighten screws.

GUN CABLES

CABLE CLEANING

Clean the cable liner after using approximately 300 pounds (136 kg) of electrode. Remove the cable from the wire feeder and lay it out straight on the floor. Remove the contact tip from the gun. Using an air hose and only partial pressure, gently blow out the cable liner from the gas diffuser end.

CAUTION

Excessive pressure at the start may cause the dirt to form a plug.

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Flex the cable over its entire length and again blow out the cable. Repeat this procedure until no further dirt comes out.

MAGNUM® FAST-MATE™