Installing Gas Supply - MAC TOOLS MW250 Owner's Manual

3-2. Installing Gas Supply

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.
8
9 10
1
4
11
Regulator/
Flowmeter
5
6
7
Argon Gas Or
OR
Mixed Gases
11 12
Figure 3-2. Typical Regulator/Flowmeter Installation
BUILDUP OF SHIELDING GAS can harm
health or kill.
•
Shut off shielding gas supply when not in use.
2
3
To Gas
5
6
7
CO Gas
2
ssb3.2* 5/94 − ST-154 623 / Ref. ST-149 827-B / Ref. ST-158 697-A
warn4.1 9/91
1 Cylinder Bracket
2 S-Hook
Crimp between small hole in brack-
et and chain.
3 Chain
4 Snap
Crimp onto open end of chain.
Obtain gas cylinder and chain to
running gear.
5 Cap
6 Cylinder Valve
Remove cap, stand to side of valve,
and open valve slightly. Gas flow
blows dust and dirt from valve.
Close valve.
7 Cylinder
8 Regulator/Flowmeter
Install so face is vertical.
9 Gas Hose Connection
Fitting has 5/8-18 right-hand
threads. Obtain and install gas
hose.
10 Flow Adjust
Typical flow rate is 20 cfh (cubic feet
per hour). Check wire manufactur-
er's recommended flow rate.
Make sure flow adjust is closed
when opening cylinder to avoid
damage to the flowmeter.
11 CO Adapter
2
12 O-Ring
Install adapter with O-ring between
regulator/flowmeter and CO
cylinder.
Tools Needed:
5/8, 1-1/8 in
OM-154 501 Page 4
2