Lincoln Electric MAGNUM 300FM - Manual (Page 13)

MAGNUM® FAST-MATE™
This screw should only be gently tightened.
Overtightening will split or collapse the liner and
cause poor wire feeding.
------------------------------------------------------------------------
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.
CAUTION
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.
Excessive pressure at the start may cause the dirt
to form a plug.
------------------------------------------------------------------------
Flex the cable over its entire length and again blow out
the cable. Repeat this procedure until no further dirt
comes out.
CAUTION
MAINTENANCE D-2 D-2