Hypertherm HD4070 Rev.1 - Manual (Page 156)

OPERATION
HyPerformance HD4070 Instruction Manual 4-31
Inspect Consumables
Part Check for Action
Retaining cap
Nozzle
Swirl ring
Electrode
Center surface Wear
O-rings 1. Damage Replace electrode*
2. Lubricant Apply a thin film of silicone lubricant if dry
*Note: Always replace the nozzle and electrode as a set.
Damage Replace swirl ring
Dirt or debris Clean and check for damage, and replace swirl ring
if damaged
Gas holes Blocked holes Replace swirl ring
O-rings 1. Damage Replace swirl ring
2. Lubricant Apply a thin film of silicone lubricant if dry
Center hole 1. Must be round Replace nozzle if hole is no longer round*
2. Signs of arcing Replace nozzle*
O-rings 1. Damage Replace nozzle*
2. Lubricant Apply a thin film of silicone lubricant if dry
Erosion or missing material Replace nozzle*
Blocked gas holes Replace nozzle*
Erosion, missing material Replace cap
Cracks Replace cap
Burns Replace cap
See Inspect Electrode Pit Depth later
in this section