Tweco 300 Auto-Cut - Manuel (Page 46)

Manual No. 0-4817 Auto-Cut 300 3-22 INSTALLATION
5. Slide the positioning tube down to the torch head. Hold the torch head stationary. Rotate the positioning tube onto
the torch head. Pull the leads back as needed to ensure a proper fit through the Mounting Tube. Do not let the torch
leads twist.
CAUTION
Ensure that the leads do not twist within the mounting tube. Leads must lie as shown in the installation
sketch.
6. The lower end of the Mounting Tube includes four threaded holes. Install an Allen set screw from the hardware kit in
any of the threaded holes to secure the Torch Head Assembly to the Mounting Tube.
7. Fasten the positioning tube into the mounting block. Slide the leads end cap down onto the torch positioning tube.
Ensure that the end cap engages the O-ring at the top of the positioning tube.
8. Install the shield cup, and cartridge assembly (including consumables) onto the torch head.
3.15 Install Consumable Torch Parts
1. Refer to the Torch Speed Charts to select the correct parts for the application. The application will determine which
torch parts must be used. Refer to the speed charts for the proper torch parts to install for a selected application.
CAUTION
Do not interchange parts. Make sure both the tip and electrode in the torch correspond with the plasma
and shield gas in use for the application.
2. Install the consumable parts as follows to ensure proper operation. These steps will help ensure that parts are
seated correctly.
NOTE
For 200-Amp consumables, when replacing the shield retainer or the shield cup, assemble these two
parts first before assembling the other consumables.
Shield
Retainer
Shield Cup
Shield Cap Shield Gas
Distr
ib
utor
Tip Plasma Gas
Distr
ib
utor
Electrode
Car
tridge
Art # A-07262
Assemble First Assemble Second
3. Stack the consumable parts together.
4. Insert the stack of consumable parts into the cartridge. Ensure that the large O-ring on the torch tip fits completely
into the cartridge. If any part of the O-ring protrudes from the cartridge, the parts are not seated properly.