Tweco SL55 Plasma Cutting - Manual (Page 6)

January 10, 2006 6 Manual 0-4759
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. Check the start cartridge for excessive wear, plugged
gas holes, discoloration, and for free movement of the
lower end plate. Replace if necessary.
Lower End Fitting
Start Cartridge
Art # A-03621
CAUTION
The start cartridge supplied with this torch cannot
be used with any other 1Torch or on any other power
supply except Lincoln Pro-Cut 55.
5. Check the end of the electrode for excessive wear.
Worn Electrode
New Electrode
Art # A-03284
6 . Reinstall the Electrode by pushing it straight into the
torch head until it clicks.
WARNINGS
Refer to the consumables selection charts for the
proper combination of torch parts, including shield
cups and shield caps.
The use of any consumable parts other than
those specified by the Manufacturer may cause
irreparable damage to the torch head.
7. Reinstall the start cartridge and tip into the torch head.
A-03645
Electrode
Start Cartridge
Tip
Shield Cup
Torch Head
8. Hand tighten the shield cup until it is seated on the
torch head. If resistance is felt when installing the cup,
check the threads before proceeding.
NOTE
When operating the torch in a normal condition, a
small amount of gas vents through the gap between
the shield cup and the torch handle. Do not attempt
to overtighten the shield cup as irreparable damage
to internal components may result.