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D-2
GUN AND CABLE
MAINTENANCE
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.
CAUTION
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.
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 push-
ing 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.
CONFIGURATION OF COMPONENTS IN WIRE FEEDING SYSTEM
Components shipped with
SP 170-I*
* If other size wire feeding is desired use the additional Contact Tips shipped loose with your SP 170-I.
• It is important when changing between welding with steel wire and aluminum to exchange feeding components due to the lubricant applied to steel wire. Failure
to do so may result in contaminated welds when welding aluminum.
MAINTENANCE
2. Replace worn contact tips as required. A variable
3. Remove spatter from inside of gas nozzle and from
4. Be sure the gas nozzle is fully screwed onto the
5. To remove gun tube from gun, remove gas nozzle
Contact Tip
Cable Liner
.035" (0.9mm)
.025"-.035"
(0.6-.9mm)
SP-170-I
or "hunting" arc is a typical symptom of a worn con-
tact tip. To install a new tip, choose the correct size
contact tip for the electrode being used (wire size is
stenciled on the side of the contact tip) and screw it
snugly into the gas diffuser.
tip after each 10 minutes of arc time or as required.
diffuser for gas shielded processes. For the
®
Innershield
process, the gasless nozzle should be
screwed onto the diffuser.
or gasless nozzle and remove diffuser from gun
tube. Remove the four screws from the gun handle
and separate the handle halves. (For L8311-5 gun
and cable handle half says magnum 100L.
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 perpen-
dicular 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 relation-
ship between the gun tube and the cable connec-
tor. Replace the gun handle, trigger and diffuser.
Replace the gas nozzle or gasless nozzle.
Drive Roll
KP665-035
2 Smooth grooves
Small .025" (0.6mm)
Large .030" (0.8mm)
D-2
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