Lincoln Electric MAGNUM IM647-A - Manual (Page 12)

D-1 MAINTENANCE D-1
MAGNUM® 400 FM DUAL PROCEDURE GUNS
NOTE: For KP42/44N and KP45N liner series.
Before fully seating the liner bushing, it will be necessary
to trim the linerʼs inner tube flush with the liner bushing
using a sharp blade. After trimming, remove any burrs
from inner tube and insure that the opening is fully open.
d. Before installing the gas diffuser, fully seat the liner
bushing in the connector end and install the liner nut and
finger tighten.
e. Be sure the cable is straight and then trim the liner to the
length shown in Figure E.1 (a gauge is included on the
wrench provided with the connection kit for gauging the
cut-off length. Remove any burrs from the end of the
liner.
f. Screw the gas diffuser onto the end of the gun tube and
tighten with the wrench provided.
g. Tighten the set screw in the side of the gas diffuser
against the cable liner using the Allen wrench provided.
This screw should only be gently tightened.
Overtightening will split or collapse the liner and cause
poor wire feeding.
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h. Replace the nozzle insulator and gas nozzle.
CAUTION
LINER ASSEMBLY (LINER BUSHING-
TO BE TIGHTLY SEATED)
LINER NUT
GAS DIFFUSER
NOZZLE INSULATOR
GAS NOZZLE
LINER TRIM-
LENGTH-
9/16" (14.3 mm)
Figure E.1
INSTALLATION AND TRIMMING
INSTRUCTIONS FOR MAGNUM® LINERS
FEEDING ALUMINUM WIRE
(KP1958 series liners)
1. Lay the gun out straight on a flat surface and
remove the gas nozzle and nozzle insulator.
A. Remove the liner nut from the connector end of
the cable.
B. Back out the set screw in the diffuser for guns
that have a set screw in the diffuser.
2. Remove the liner and insert a new untrimmed liner
into the connector end of the cable. Check that the
coils of the spring liner can be seen through the
holes in the gas diffuser.
3. Mark the liner 3/16" (5 mm) from the end of the
liner guide. Pull the liner partially out and cut off the
liner at the mark using a sharp knife.
4. Screw the brass liner nipple onto the liner and fully
seat the liner busing into the liner guide.
A. Replace the liner nut and finger tighten.
5. For guns with a diffuser set screw, tighten the set
screw in the side of the gas diffuser against the
cable liner using the Allen wrench provided.
REMOVAL, INSTALLATION AND
TRIMMING INSTRUCTIONS FOR
MAGNUM® LINERS FEEDING STEEL
WIRE
(KP44 and KP44N liner series)
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 anoth-
er 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. Lay the gun and cable straight on a flat surface.
b. Remove and save the gas nozzle and nozzle insu-
lator. Make sure that the set screw in the gas dif-
fuser is backed out so as not to damage the liner.
Use the 5/64” (2.0 mm) Allen wrench provided.
Remove and save the gas diffuser from the end of
the gun tube assembly. Remove and save the liner
nut from connector end.
c. Remove old liner and insert a new untrimmed liner
into the connector end of the cable. Be sure the
liner bushing is stenciled appropriately for the wire
size being used.