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CONTACT TIP REPLACEMENT
Each application will dictate the frequency of contact tip replacement. Higher amperage, higher duty cycle operations will require more frequent contact tip replacement. The condition of the contact tip greatly effects the welding performance of the Tandem MIG process. A routine contact tip replacement schedule should be established and adhered to. For general operations contact tips should be changed at the beginning of every shift.
LINER REPLACEMENT
Wire condition, plant environment and the wire con- sumption rate will dictate how often a liner should be changed. Welding operations using small diameter welding wire will require a more frequent contact tip change interval than operations using larger diameter welding wires. For general operations using .045 " dia wire, liners should be changed or cleaned after approximately 2000 lbs. of wire use.
GOOSENECK REPLACEMENT
The Tandem torch is designed with two separate goosenecks that extend from the mounting and clamping arm assembly. The goosenecks are config- ured as a left and a right gooseneck, they are not interchangeable. Goosenecks require replacement when they become bent or the outer cover becomes damaged.
Replacement Procedure
1.Disconnect the water supply and return hoses as well as the air blast hose.
2.Remove the five hex head screws (5/32" allen) securing the upper housing of the torch clamping assembly.
3.Remove torch diffusers, nozzle insulator and retainer.
4.Lift upper portion of clamping assembly from lower, slide back the black plastic back housing to expose gooseneck to unicable connection.
5.Free the connection form the clamping assembly and with one 1" and one 3/4"" wrench unscrew gooseneck from unicable brass junction fitting.
6.Replace damaged gooseneck with replacement gooseneck making sure that the gooseneck is properly identified as either a left or right goose- neck. (Left and right are determined by viewing the torch from the nozzle end.)
7.Place newly assembled unicable and gooseneck back into the back plastic housing.
8.Place nylon spacer between the two flat surfaces of the gooseneck brass connector. (Flat surfaces should be aligned parallel to each other.)
9.Seat back hosing inside the recessed lip of the lower portion of clamping assembly.
10.Install upper half of clamping assembly after seating goosenecks and plastic housing.
11.Loosely tighten the five hex head screws of clamping house.
12.Install gooseneck insulators onto both goose- necks.
13.Slide nozzle retainer over goosenecks and gooseneck insulators. (Necks should be free to rotate as the new retainer is slid into place.)
14.Install nozzle insulator over ends of goosenecks.
15.Install gas diffusers.
16.Install contact tips.
17.Check contact tip alignment. Alignment should be at equal angles and square to the body of the torch. (use
18.Once contact tips are aligned, securely tighten the five hex head screws of clamping assembly.
19.Recheck alignment after tightening the clamping assembly.
20.Reinstall gas and water hoses.
800 AMP TANDEM MIG TORCH
