Lincoln Electric IM790 SP-175 Plus - Manual (Page 27)

D-4
SP-175 PLUS
D-4 MAINTENANCE
CHANGING LINER
NOTICE: 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 cutoff
length requirement. Refer to Figure D.2.
1. Remove gun and cable assembly from machine.
2. Remove the gas nozzle from the gun by
unscrewing counter-clockwise.
3. Remove the existing contact tip from the gun by
unscrewing counter-clockwise.
4. Remove the gas diffuser from the gun tube by
unscrewing counter-clockwise.
5. Lay the gun and cable out straight on a flat sur-
face. Loosen the set screw located in the brass
connector at the wire feeder end of the cable.
Pull the liner out of the cable.
6. 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.
7. Fully seat the liner bushing into the connector.
Tighten the set screw on the brass cable con-
nector. At this time, the gas diffuser should not
be installed onto the end of the gun tube.
8. With the gas nozzle and diffuser removed from
the gun tube, be sure the cable is straight, and
then trim the liner to the length shown in the
Figure D.2. Remove any burrs from the end of
the liner.
9. Screw the gas diffuser onto the end of the gun
tube and securely tighten.
10. Replace the contact tip and nozzle.
1-1/4 (31.8 mm)
Liner Trim Length
Gas Diffuser
Gas Nozzle or
Gasless Nozzle
Set Screw Brass Cable
Connector
Liner Assembly
(Liner bushing to be sealed tight
against brass cable connector)
FIGURE D.2
Liner trim length