1.013.9028 is an air filter element for the CYTJ45(A) mining hydraulic drilling rig, where it is listed as the "air main filter element". The CYTC115(A) is a hydraulic mining drilling rig equipped with an on-board JN5.5 air compressor producing 0.75 m³/min at 6–8 bar . The rig's air intake system requires filtration to protect the compressor and downstream pneumatic components from dust and particulate contamination.
