Lincoln Electric WELD-PACK 100 PLUS IM546 - Manual (Page 36)

D-2 MAINTENANCE
WELD-PAK 100
5. To remove gun tube from gun, remove
gas nozzle or gasless nozzle and
remove diffuser from gun tube. Remove
both collars from each end of the gun
handle and separate the handle halves.
Loosen the locking nut holding the gun
tube in place against the gun end cable
connector. Unscrew gun tube from cable
connector. To install gun tube, screw the
locking nut on the gun tube as far as
possible. Then screw the gun tube into
the cable connector until it bottoms.
Then unscrew (no more than one turn)
the gun tube until its axis is perpendicu-
lar to the flat sides of the cable connector
and pointed in the direction of the trigger.
Tighten the locking nut so as to maintain
the proper relationship between the gun
tube and the cable connector. Replace
the gun handle, trigger and diffuser.
Replace the gas nozzle or gasless noz-
zle.
COMPONENT
REPLACEMENT
PROCEDURES
CHANGING THE CONTACT TIP
1. Refer to Figure D.2. Remove the gas
nozzle from the gun by unscrewing
counter-clockwise.
2. Remove the existing contact tip from the
gun by unscrewing counter-clockwise.
3. Insert and hand tighten desired contact
tip.
4. Replace gas nozzle.
GUN AND CABLE
MAINTENANCE
FOR MAGNUM™ 100L GUN
Gun Cable Cleaning
Clean cable liner after using approximately
300 lbs (136 kg) of solid wire or 50 lbs (23
kg) of flux-cored wire. Remove the cable
from the wire feeder and lay it out straight
on the floor. Remove the contact tip from
the gun. Using low pressure air, gently blow
out the cable liner from the gas diffuser end.
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 proce-
dure until no further dirt comes out.
Contact Tips, Nozzles, and Gun Tubes
1. Dirt can accumulate in the contact tip
hole and restrict wire feeding. After each
spool of wire is used, remove the contact
tip and clean it by pushing a short piece
of wire through the tip repeatedly. Use
the wire as a reamer to remove dirt that
may be adhering to the wall of the hole
through the tip.
2. Replace worn contact tips as required. A
variable or “hunting” arc is a typical
symptom of a worn contact tip. To install
a new tip, choose the correct size con-
tact tip for the electrode being used (wire
size is stenciled on the side of the con-
tact tip) and screw it snugly into the gas
diffuser.
3. Remove spatter from inside of gas noz-
zle and from tip after each 10 minutes of
arc time or as required.
4. Be sure the gas nozzle is fully screwed
onto the diffuser for gas shielded
processes. For the Innershield
® process,
the gasless nozzle should be screws
onto the diffuser.
CAUTION