Tweco 40mm Cutmaster - Manual (Page 64)

CUTMASTER 40mm
SERVICE 5T-2 Manual 0-5084
5T.02 Inspection and Replacement
of Consumable Torch Parts
WARNING
Disconnect primary power to the system before
disassembling the torch or torch leads.
DO NOT touch any internal torch parts while the AC
indicator light of the Power Supply is ON.
Remove the consumable torch parts as follows:
NOTE
The shield cup holds the tip and starter cartridge
in place. Position the torch with the shield cup
facing upward to prevent these parts from falling
out when the cup is removed.
1. Unscrew and remove the shield cup from
the torch.
NOTE
Slag built up on the shield cup that cannot be
removed may effect the performance of the
system.
2. Inspect the cup for damage. Wipe it clean
or replace if damaged.
Art # A-08067
Shield Cups
3. On torches with a shield cup body and a
shield cap or deflector, ensure that the cap
or deflector is threaded snugly against the
shield cup body. In shielded drag cutting
operations (only), there may be an O-ring
between the shield cup body and drag
shield cap. Do not lubricate the O-ring.
Drag Shield Cap
Shield
Cup Body
O-Ring No. 8-3488
Art # A-03878
4. Remove the tip. Check for excessive wear
(indicated by an elongated or oversized ori-
fice). Clean or replace the tip if necessary.
Good Tip Worn Tip
A-03406
Example of Tip Wear
5. Remove the starter cartridge. Check for
excessive wear, plugged gas holes, or dis-
coloration. Check the lower end fitting for
free motion. Replace if necessary.
Art # A-08064_AC
Spring-Loaded
Lower End Fitting
Full Compression
Spring-Loaded
Lower End Fitting at Reset /
Full Extension
6. Pull the Electrode straight out of the Torch
Head. Check the face of the electrode for
excessive wear. Refer to the following
figure.
Worn Electrode
New Electrode
Art # A-03284
Electrode Wear
7 . Reinstall the Electrode by pushing it
straight into the torch head until it clicks.
8 . Reinstall the desired starter cartridge and
tip into the torch head.
9. Hand tighten the shield cup until it is seat-
ed on the torch head. If resistance is felt
when installing the cup, check the threads
before proceeding.
This completes the parts replacement procedures.