158
4. Unscrew nozzle retainer and pull nozzle straight out of torch body. Inspect insulator portion of the nozzle
retainer for cracks or chipping. Replace if damaged.
Inspect nozzle for:
melting or excessive current trans-•
fer.
gouges from internal arcing. •
nicks or deep scratches on the O-ring •
seating surfaces.
O-ring cuts, nicks, or wear. •
Remove tungsten particles (from the •
nozzle) with steel wool.
Replace if any damage is found.
NOTE:
Discoloration of internal surfaces and small black starting marks are normal and do not eect cutting
performance.
If the holder was tightened suciently, the electrode may unscrew without being attached to the electrode
holder. When installing the electrode, use only sucient force to adequately secure the electrode.
5. Remove electrode using electrode removal tool.
6. Disassemble electrode from electrode holder. Insert ats on the holder into a 5/16" wrench. Using the elec-
trode tool, rotate electrode counter-clockwise to remove. Replace electrode if center is pitted more than
0.06" (1/16") or if the at has become irregular in shape or is worn to a larger diameter.
Torch Body
Electrode Removal Tool
Electrode
SECTION 5 MAINTENANCE
Electrode, Tungsten
Electrode/Collet Holder
Collet Body
Nozzle
Nozzle Retaining Cup
Torch Body
Note:
The electrode has two usable ends. When
one end is worn, ip electrode to other end
for continued use.