Miller Electric Spoolmate 100 Series Owner's Manual page 17

B. Connecting Spool Gun To Millermatic 140/180
.
Be sure that gun end is tight against drive assembly.
Incorrect
Gun Not Seated
6
7
1 3
4
4
Exposed O-rings
will cause shielding
Gun Fully Seated
gas leakage.
1
2
3
4
Loosen thumbscrew. Insert end
through opening until it bottoms
against drive assembly. Tighten
gun securing knob.
Spool gun must be inserted
completely to prevent leakage of
5 shielding gas.
5
Insert plug into receptacle, and
tighten threaded collar.
6
Place switch in Spool Gun position.
7
To make proper polarity connection,
2
see welding power source Owner's
Manual.
Close door.
4
Correct
Drive Assembly
Spool Gun
Gun Securing Knob
Gun End
Gun Trigger Plug
Spool Gun/MIG Gun Switch
Polarity Changeover Terminal
Block
804 984-A / Ref. 801 987
OM-234 016 Page 13