Tweco 400 XT Ultra-Cut Plasma Cutting System - Manual (Page 105)

ULTRA-CUT 400 XT
Manual 0-5275 TORCH INFORMATION 7-5
CAUTION
The cartridge assembly must cover the O-Ring on the torch head.
Do not force the cartridge if it will not tighten fully. Remove the cartridge assembly and gently clean the
threads on the torch head with a wire brush. Apply oxygen-compatible lubricant (supplied with the torch)
to the threads.
Torch Head O-Ring
Torch Head
Art # A-07202
0.063 - 0.083"
(1.6 - 2.1 mm)
Protrusion
Installing Assembled Cartridge Onto Torch Head
3. Slide the ohmic clip over the shield cup if using ohmic torch height control sensing.
NOTE
Ohmic height sensing is not recommended with water shield. Water on the plate interferes electrically
with the ohmic sensing circuit.
Ohmic Clip
Art # A-03393_AB
�. Connect the wire lead from the height finder to the ohmic clip.