Lincoln Electric 11519 Service Manual page 35

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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. If this has been done and feed problems
are experienced, try liner replacement, and refer to
trouble shooting section on rough wire feeding.
LINER REMOVAL
AND REPLACEMENT
Changing the liner for a different wire size
NOTE:
requires replacement of the gas diffuser per
Table D.1 to properly secure the different liner.
TABLE D.1
Diameter of Replacem
Size Stencilled
Electrode Used
ent on End of liner
Line Part
Bushing
Number
.025-.030" Steel KP1934-2 .030 (0.8 mm)
(0.6-0.8 mm)
.035-.045" Steel KP1934-1 .045 (1.2 mm)
(0.9-1.2 mm)
3/64" Aluminum KP1955-1 3/64" (1.2 mm)
(1.2 mm)
LINER REMOVAL, INSTALLATION
AND TRIMMING INSTRUCTIONS
FOR MAGNUM 250L
NOTE: The variation in cable lengths prevents the
interchangeability of liners between guns.
Once a liner has been cut for a particular gun,
it should not be installed in another gun unless
it can meet the liner cutoff length requirement.
Liners are shipped with the jacket of the liner
extended the proper amount.
1. Remove the gas nozzle and nozzle insulator, if
used, to locate the set screw in the gas diffuser
which is used to hold the old liner in place. Loosen
the set screw with a 5/64" (2.0 mm) Allen wrench.
2. Remove the gas diffuser from the gun tube.
3. Lay the gun and cable out straight on a flat sur-
face. Loosen the set screw located in the brass
connector at the feeder end of the cable and pull
the liner out of the cable.
MAINTENANCE
4.
NOTE: For liners KP1950-7, KP1950-8, KP1955-1 and
Before fully seating the liner bushing, it will be neces-
sary to trim the liner's 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.
5.
Fixed Nozzle Adjustable
Gas Diffuser nozzle Gas
Part No. (and Diffuser Part
6.
stencil) No. (and
Stencil)
KP2026-3 KP2026-2
KP2026-3 KP2026-1B1
7.
KP2026-3 KP2026-1B1
8.
Power MIG® 255XT
Insert a new untrimmed liner into the connector
end of the cable. Be sure the liner bushing is sten-
cilled appropriately for the wire size being used.
KP1599-2
Fully seat the liner bushing into the connector.
tighten the set screw on the brass cable connec-
tor. The gas diffuser, at this time, should not be
installed onto the end of the gun tube.
With the gas diffuser still removed from the gun
tube, be sure the cable is straight, and then trim
the liner to the length shown in Figure D.1.
Remove any burrs from the end of the liner.
Screw the gas diffuser onto the end of the gun
tube and securely tighten. Be sure the gas diffuser
is correct for the liner being used. (See table and
diffuser stencil.)
Tighten the set screw in the side of the gas dif-
fuser against the cable liner using a 5/64" (2.0
mm) Allen wrench.
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