Steps-to-clean-the-filter :
Tap the sides of the filter element against a flat surface to remove most of the heavy dry sand
Dry air is blown in a direction opposite to the suction air with dry air of less than 0.28 MPa, and the nozzle is spaced apart from the folded paper by 25 mm and blows up and down along its length.
If there is grease on the filter element, it should be washed in warm water with no foaming detergent. In this warm water, at least the filter element should be immersed for 15 minutes, and washed with clean water in the hose. Do not use heating to accelerate it. One filter can be washed 5 times, then discarded and can no longer be used
Put a light in the filter to check. If it is found to be thin, the pinhole or the damaged part should be discarded.
