4-4
O
PERATION
Operator Manual
OPERATING TIPS
Changing Consumable Parts
Changing the consumable parts requires no tools:
1. Unscrew the retaining cap and the remaining parts will come apart easily. When you unscrew
the retaining cap, you will hear a click. This click is a microswitch (cap-on sensor switch) that
disables the power supply if it is plugged in.
2. Inspect the nozzle for damage or wear. If the hole is worn or oval-shaped, replace it.
3. Inspect the electrode. If the center has a pit more than 1/16 inch (1.6 mm) deep, replace it.
4. Inspect the swirl ring. It should be clean, and the holes along the side should not be plugged. If
it is damaged, replace it.
5. Inspect the O-ring on the torch. It should be lubricated and undamaged. If it is dry, lubricate it
with a thin film of the lubricant provided in the consumable parts kit. If it is damaged, replace it.
6. Replace the parts as shown in Fig. 4-3. Each part fits in only one direction, so you cannot put
the parts in backwards. Also, the torch will not fire if the parts are improperly installed.
7. When the nozzle, electrode and swirl ring are properly in place, replace the retaining cap.
When the retaining cap is tightened, the microswitch will click, indicating that the torch is again
ready for operation. Plug the power supply back in.
The consumable parts are found in a box, located in the left side of the power supply cover.
Swirl Ring
020239
Extended
Electrode
020382
Extended
Nozzle
120504
Retaining Cap
020218
Figure 4-3 Consumable Parts
WARNING
SHOCK HAZARD: Always turn off the power and unplug the cord before changing consum-
able parts. Do not rely on the cap-on sensor switch to remove power. It is provided strictly
for safety backup. In the U.S., use a "lock-out / tag-out" procedure until the service or mainte-
nance work is complete. In other countries, follow appropriate national or local safety proce-
dures.
