Hypertherm HD3070 Plasma Arc Cutting System w/ Automatic Gas Console - Manual (Page 102)

HD3070 with Automatic Gas Console Instruction Manual 4-13
16
OPERATION
4. Remove the electrode using the removal tool. The electrode should be inspected and replaced if there is a pit
0.040 inch (1 mm) deep. See Figure 4-8 in order to check the pit depth. Check the O-ring for wear and damage.
5. Remove the swirl ring using the removal tool. Insert the tool into the swirl ring until it catches on the lip and then
pull back to remove the swirl ring. Inspect the swirl ring for plugged holes or damage. Check O-rings for wear
and damage.
Replacement
Do not use an excessive amount of silicone grease when applying to any of the consumable O-rings.
Excess grease can easily plug ports and holes, causing improper gas flow during operation. Only apply a
light coat of silicone grease.
Avoid touching the tip of the electrode during installation as grease or dirt may affect starting reliability.
Check the electrode tip and wipe clean if necessary.
1. Apply silicone to the electrode O-ring and then to both O-rings on the swirl ring.
2. Insert the electrode into the small diameter end of the swirl ring, then insert the swirl ring (large diameter end)
into the nozzle. Apply silicone to the nozzle O-rings, then insert the nozzle into the torch and push it into place.
3. Inspect the threads on the torch main body, and clean threads if necessary. Apply silicone to the O-rings on the
torch main body.
4. Install the inner cap on to the torch main body. Hand tighten the inner cap snugly to ensure good electrical
contact. Do not overtighten.
5. Install the shield cap with the shield in place on to the torch main body. If the shield is not in place, apply silicone
to the O-ring and insert the shield into the shield cap and push into place. Hand tighten the shield cap snugly.
Failure to tighten the shield cap snugly could result in poor electrical contact and water and gas leaks
which will impair cut quality.