Lincoln Electric IM666-A manual Liner Installation Trimming Instructions

A-4 INSTALLATION A-4

FIGURE 2

CONNECTION DIAGRAM

For G3494-2 thru -6 and G3494-2A thru -6A

G3494-2 thru -6

To Lead Water cooler

To Lead Wire Feeder To Trail Wire Feeder

To Trail Water cooler

To Shielding Gas

To Air Blast

To Nozzle Water cooler

G3494-2A thru -6A

To Lead Water cooler

To Lead Wire Feeder

and Shielding Gas

Solenoid

To Trail Wire Feeder

and Shielding Gas

Solenoid

To Trail Water cooler

No Hose

To Air Blast

To Nozzle Water cooler

LINER INSTALLATION AND

TRIMMING INSTRUCTIONS

a)Lay the torch and cable on a flat surface and straighten the cables.

b)With a 12 mm open-end wrench, unscrew the nut on the cable connector that restrains the liner. Remove the nozzle, and then remove both dif- fusers.

c)Remove the old liners.

d)Insert the new untrimmed liners into the connector end of the cable. Be sure the liner is of the correct size and type as stenciled on the liner bushing.

e)Screw the nut on to the cable connector. Snug, but do not overtighten.

f)Be sure the cable is still straight, and then trim the liner so that 0.3 inch (6.5mm) of the liner extends past the end of the torch. Remove any burrs from the end of the liner.

g)Screw the gas diffusers onto the torch and tighten.

CONTACT TIP AND GAS NOZZLE INSTALLATION

a)Choose the correct size contact tip for the elec- trode being used (wire size is stenciled on the side of the contact tip) and screw it snugly into the gas diffuser.

b)Select the gas nozzle that best suits the welding application. Inspect the o-rings on the nozzle for cuts or tears, and replace if necessary. Examine the nozzle shield and make sure it is free of spatter and welding debris. Slide the nozzle onto the torch and secure it into position with the threaded collar.

CONNECTING THE TORCH TO THE WELDING EQUIPMENT

(See Figure 2)

There are three cable bundles for the Tandem MIG torch.

a) G3494-X Series:

Two of the cable assemblies supply power, wire and water cooling to each side of the torch. The third bundle is made up of the nozzle water cooling hoses, the air blast line and the shielding gas line.

b)G3494-XA Series:

Two of the cable assemblies supply power, wire, shielding gas and water cooling to each side of the torch. The third bundle is made up of the nozzle water cooling hoses and the air blast line.

Both the G3494-X and the G3494-XA series torches require a K489-7 Fast-Mate adapter to connect the torch to wire feeder. When connecting to a Power Feed 10R wire feeder a K1500-1 gun connector must be installed at feeder before installing K489-7 Fast- Mate adapter.

a)Check that the drive rolls and feeder guide tubes are appropriate for the electrode size and type being used.

TANDEM MIG TORCH