Hobart Welding Products OM-198 683C Setting Gun Polarity For Wire Type, Installing Gas Supply

2-8. Setting Gun Polarity For Wire Type

Changing Polarity

Wire Drive	Work Clamp Lead
Assembly Lead

D

D

+Positive Terminal - Negative Terminal

Shown as shipped – Electrode Positive (DCEP): For solid steel, stainless steel, aluminum, or flux core with gas wires (GMAW).

Electrode Negative (DCEN): Reverse lead connections at terminals from that shown above for gasless flux core wires (FCAW). Drive assembly becomes negative.

1Polarity Changeover Label Information

Always read and follow manufac- ture’s recommended polarity.

1

3/4, 11/16 in

Ref. 190 821-A

2-9. Installing Gas Supply

4

5

6

1

2

3

Argon Gas

1

OR

2

7

3

8 9

CO2 Gas

Tools Needed:

1-1/8, 5/8 in

Obtain gas cylinder and chain to running gear, wall, or other station- ary support so cylinder cannot fall and break off valve.

1Cap

2Cylinder Valve

Remove cap, stand to side of valve, and open valve slightly. Gas flow blows dust and dirt from valve. Close valve.

3Cylinder

4Regulator/Flowmeter

Install so face is vertical.

5Regulator/Flowmeter Gas Hose Connection

6Welding Power Source Gas Hose Connection

Connect customer supplied gas hose between regulator/flowmeter gas hose connection, and fitting on rear of welding power source.

7 Flow Adjust

Typical flow rate is 20 cfh (cubic feet per hour). Check wire man- ufacturer’s recommended flow rate.

8CO2 Adapter (Customer Sup- plied)

9O-Ring (Customer Supplied)

Install adapter with O-ring between regulator/flowmeter and CO2 cylinder.

Ref. ST-148 265-B / ST-802 028

OM-198 683 Page 12