MAC TOOLS MW250 Owner's Manual - Warning
OM-154 501 Page 8
3-6. Installing Wire Spool And Adjusting Hub Tension
Turn Off unit.
1
Wire Spool
2
Gun Contact Tip
If necessary, cut welding wire off at
contact tip, and retract wire onto
spool and secure.
3
Retaining Ring
4
Compression Spring
Remove ring and pull off spool.
Compression spring is used with 8
in (200 mm) spools.
5
Hub
6
Hub Pin
Slide spool onto hub so wire feeds
off bottom. Turn spool until hub pin
fits hole in back of spool. Reinstall
retaining ring.
7
Hub Tension Nut
Grasp spool in one hand and turn
while using a wrench to adjust hub
tension nut. When a slight force is
needed to turn spool, tension is set.
Thread welding wire (see Section
3-7). Close door.
1
2
Ref. ST-801 103-B / Ref. ST-072 573-B
Tools Needed:
3
4
5
6
15/16 in
7
Figure 3-7. Installing Wire Spool And Adjusting Hub Tension
3-7. Threading And Feeding Welding Wire
WARNING
CYLINDERS can explode if damaged.
•
Keep cylinders away from welding and other
electrical circuits.
•
Never touch cylinder with welding electrode.
•
Always secure cylinder to running gear, wall, or
other stationary support.
ELECTRIC SHOCK can kill.
•
Do not touch live electrical parts.
The welding wire, drive rolls, drive assembly, and all
metal parts touching the welding wire are electrically
live when welding or feeding wire using gun trigger.
WELDING WIRE can cause puncture
wounds.
•
Do not press gun trigger until instructed to do so.
•
Do not point gun toward any part of the body, other
people, or any metal when threading welding wire.
HOT SURFACES can burn skin.
•
Allow gun to cool before touching.
swarn5.1 10/91 / swarn2.1 9/91