Maintenance - Lincoln Electric K4872-1 Operator's Manual

MAGNUM PRO ® 175L & 250L

MAINTENANCE

REMOVAL, INSTALLATION AND TRIMMING INSTRUC-
®
TIONS FOR MAGNUM PRO LINERS
Note: The variation in cable lengths prevents the interchangeability
of liners. Once a liner has been cut for a particular gun, it should
not be installed in another gun, unless it can meet the liner cut off
length requirement. Liners are shipped with the jacket of the liner
extended the proper amount.
a. Remove the gas nozzle and diffuser from the gun.
b. Loosen set screw located in the brass cable connector at the
wire feeder end of the cable using the same 5/64 (2.0 mm)
Allen wrench. Pull liner out of cable.
REMOVAL AND INSTALLATION OF 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 3 socket- head
clamping screws in handle with an Allen wrench. Remove a
knurled nut at the base of the handle. Remove nozzle and
diffuser on the threaded gun tube from the cable assembly.
d. To reinstall, reverse procedure.
GUN CABLE CLEANING
Clean 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.
C-1
MAINTENANCE