Lincoln Electric Wire Feeder LN7

Warning: This maintenance check requires trained personnel with PPE!

If the gun cable is not dirty, stop the procedure

Enter the amount of electrode used

Was the cable removed from the wire feeder?

Was the cable laid out straight on the floor?

Was the contact nozzle tip removed from the gun?

Was the cable gently blown out using an air hose and only partial pressure?

Was the full length of the cable worked by bending it back and forth and then blown out again?

Replace worn contact tips as required

On Innershield guns, remove spatter from tip or extension guide after each ten minutes of arc time or as required

Replace worn spring liners in nozzles. The life of the liner can be doubled by rotating liner 180°. The liner can be pulled out the back end of the nozzle by wedging the blade of a small screwdriver in the I.D. and pulling

Inner parts of nozzles can be removed and replaced by removing the internal hollow-lock set screw from the contact tip end of the nozzle with a 5/32 or 3/32 Allen wrench

Sign off on the gun nozzle maintenance

Turn off the incoming air and release the tank pressure

Remove the coiled aluminum tubing from the bottom of the filter unit

Remove the pinched copper end piece from the end of the aluminum tube

Wash all the material out of the aluminum tube

Clean out the short pinched section

Is the end piece badly corroded?

Replace the corroded end piece with a new one

Loosen the collar on the 2-1/8 inch steel filter tube and take the filter tube off the machine

Wash out the steel filter tube completely