Maintenance for the cartridge
Do the recommended steps to help keep a cartridge operating correctly.
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Carefully remove molten metal that collects in the castellations of the
drag-cutting cartridges.
Do not push the unwanted material inside the nozzle or shield.
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Examine the O-ring on the torch body.
Option Description If the O-ring is cracked or worn Replace the O-ring. If the O-ring is dry, or if it is not easy to install the cartridge Apply a thin layer of silicone lubricant on the O-ring and the threads. Make sure that the O-ring is shiny, but do not apply too much lubricant. Figure 1. Components to examine 
1 O-ring 2 Holes for airflow 3 Nozzle 4 Castellations 5 Shield