An apparatus for filtering a drilling fluid. The separator includes a coupler having a central axis and being configured to connect the drive shaft with the compressor shaft such that the rotation of the driver shaft rotates the coupler and connected compressor shaft. The main enlarged member is extended towards the camshaft for increasing volume of the reed valve chambers while avoiding the increase in size of the head cover. The application instructs the graphics module to populate the ranged surface by drawing into the ranged surface. faults, and provide the operator with onsite information as to the possible causes of, and potential solutions to, the unsatisfactory condition.