Lincoln Electric POWER MIG IM736-D - Manual (Page 28)

D-2 D-2 MAINTENANCE
5. Seat Liner bushing into back of gun. Secure Liner
by tightening set screw. Do not install the gas dif-
fuser at this time.
6. Lay the cable straight and trim Liner to 9/16”.
Remove burrs.
7. Secure the gas diffuser into the tube.
8. Tighten the set screw against the Liner.
This screw should only be gently tightened. Over
tightening will split or collapse the liner and cause
poor wire feeding.
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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. If this has been done and feed prob-
lems are experienced, try liner replacement, and refer
to trouble shooting section on rough wire feeding.
LINER REMOVAL AND REPLACEMENT
(SEE FIGURE D.1)
LINER REMOVAL, INSTALLATION AND TRIMMING
INSTRUCTIONS FOR MAGNUM 300
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.
2. Remove the gas diffuser from the gun tube. If gas
diffuser contains a small set screw, loosen the set
screw.
3. Lay gun and cable out straight on a flat surface.
Loosen set screw of the connector on the back end
of the gun.
4. Insert the untrimmed Liner into the back end of the
gun.
CAUTION
CAUTION
GUN HANDLE
SET SCREW
SET SCREW
INSULATION TUBE
FEEDR END
CABLE HANDLE
CLAMPING SCREW
GUN TUBE
9/16 (14.3mm)
GAS DIFFUSER
NOZZLE INSULATION
GAS NOZZLE
MOLDED GAS PLUG
LINER ASSEMBLY (LINER BUSHING TO BE SEATED
TIGHT AGIANST BRASS CABLE CONNECTOR)
BRASS CABLE
CONNECTOR
LINER TRIM
LENGTH
FIGURE D.1
POWER MIG 300