8. Check the fan motor and belt tension every two weeks.

9. Clean the jet pipes of the front and rear washing trays every 7 days to prevent clogging.

10. For heat-treated products that are oil quenched and subjected to low-temperature tempering, the tempering furnace must increase the furnace temperature to 400℃ every 15-20 days.

Burn off the residual smoke and soot inside the furnace.

11. The carburizing furnace operates with coal firing every 15-20 days, for a duration of no less than 8 hours.