Miller Electric OM-234 016D - Manual (Page 22)

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