Component Replacement Procedures - Lincoln Electric SP-100 Service Manual

MAINTENANCE
• Replace Liner – when wire feeding prob-
lems occur and other items have been
checked (refer to Changing Liner, in this
section).
COMPONENT REPLACE-
MENT 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.
CHANGING DRIVE ROLL
The SP-100 Wire Feed Drive Roll (1 ) has
two grooves; one for 0.023" – 0.025" (0,6
mm) solid steel electrode and the other for
0.030" (0,8 mm) solid and 0.035" (O,9 mm)
flux-cored steel electrode. See Figure D.1.
As shipped, the drive roll is installed in the
0.023" – 0.025" (0,6 mm) position (as indi-
cated by the stenciling on the exposed side
of the drive roll). If 0.030" (0,8 mm) or
0.035" (0,9 mm) wire is to be used, the drive
roll must be reversed as follows:
Liner trim length for the Magnum 100L gun (red trigger)
Set Screw
Liner Assembly
(Liner bushing to be sealed tight
against brass cable connector)
3
1. Make certain the SP-100 power switch is
off "O".
2. Open the Spring Loaded Pressure Arm
(2); Lift up the Idle Roll Arm (3).
3. Remove the drive roll retaining screw and
washer.
4. Remove the drive roll, flip over and install
with the 0.030/0.035" (0.8/0.9 mm) stencil
visible (away from gearbox). Make cer-
tain the small key is in place in the key-
way.
5. Replace the washer and retaining screw.
FIGURE D.2
Gas Diffuser
Brass Cable
Gas Nozzle or
Connector
Gasless Nozzle
FIGURE D.1
2
Wire size is stenciled
1
on the ends of the
drive roll.
1-1/4 (31.8 mm)
Liner Trim Length
D-2
SP-100