OPERATION
HPR400XD Manual Gas Instruction Manual 4-11
Inspect consumables
Inspect Look for Action
Shield cap
Erosion, missing material
Cracks
Burned surface
Replace shield cap
Replace shield cap
Replace shield cap
Shield
General:
Erosion or missing material
Molten material attached
Blocked gas holes
Center hole:
Must be round
O-rings:
Damage
Lubricant
Replace shield
Replace shield
Replace shield
Replace the shield when the hole is no longer round
Replace shield
Apply a thin film of silicone lubricant if the o-rings are dry
Nozzle
retaining cap
General:
Damage to insulating ring
Poor cut quality after
replacing other consumables
Replace nozzle retaining cap
Replace nozzle retaining cap
Nozzle
Always replace the nozzle and
electrode as a set.
General:
Erosion or missing material
Blocked gas holes
Center hole:
Must be round
Signs of arcing
O-rings:
Damage
Lubricant
Replace nozzle
Replace nozzle
Replace the nozzle when the hole is no longer round
Replace nozzle
Replace nozzle
Apply a thin film of silicone lubricant if the o-rings are dry
Swirl ring
General:
Chips or cracks
Blocked gas holes
Dirt or debris
O-rings:
Damage
Lubricant
Replace swirl ring
Replace swirl ring
Clean and check for damage; replace when damaged
Replace swirl ring
Apply a thin film of silicone lubricant if the o-rings are dry
Electrode
Always replace the nozzle and
electrode as a set.
Center surface:
Emitter wear - a pit forms as
the emitter wears.
O-rings:
Damage
Lubricant
In general, replace the electrode when the pit depth is
0.04 inches or greater. For the 400 amp mild steel
electrode and all SilverPlus electrodes, replace the
electrode when the pit depth is 0.06 inches or greater.
Replace electrode
Apply a thin film of silicone lubricant if the o-rings are dry
Insulating ring
Emitter
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