Miller Electric OM-234 016D - Manual (Page 21)

OM-234 016 Page 12
3-3. Connecting Spool Gun To Millermatic 140/180 Models
A. Installing Optional Spool Gun Switch In Millermatic 140/180 Models
Ref. 804 984-A / 804 982-A
Tools Needed:
1/4, 5/16 in
9/16 in
.
For Renegade 180 And
Passport Plus Models: Discard
switch assembly; unit is
pre−wired for spool gun option.
Go to Section 3-4 or 3-5.
!
Turn Off unit, and disconnect
input power.
.
For units prior to Serial No.
LH210051N, use retrokit part
no. 300409 for installing spool
gun switch.
Remove wrapper from welding
power source.
1
Welding Power Source Center
Baffle
2 Snap-in Blank
Remove and discard snap-in blank
from hole in center baffle.
3
Switch Assembly
4 Star Washer
5 Jam Nut
Remove top jam nut and star
washer from switch (switch is
equipped with two nuts, a jam nut
and a backing nut).
Insert switch assembly into center
baffle so that keyway in switch shaft
is facing up.
Secure switch to center baffle with
star washer and jam nut. Tighten
jam nut enough to keep switch from
rotating.
6
Wiring Harness Connectors
7 Switch Connectors
8 Label
Locate and separate connectors in
wiring harness near label.
Connect switch connectors to
matching connectors in wiring
harness.
Install wrapper on unit.
Operation:
Place switch in the position with the
spool gun symbol on the label for
spool gun operation. Place switch in
the position with the MIG gun symbol
on the label for wire feeder/MIG
(GMAW) gun operation.
When the switch is in the spool gun
position, spool gun wire feed speed
and voltage are controlled by
welding power source controls.
2 1
7
6
4
3 1
5
8