It is necessary to frequently check and change the recycling machine's:

The need to frequently check and change the oil and filter in a recycling machine is important for maintaining its operational efficiency and longevity. The oil lubricates the moving components of the machine, which helps prevent wear and tear over time. A clean filter is essential to ensure that any contaminants or impurities that might enter the system are removed, which further protects the integrity of the machine. Regular maintenance of these components ensures that the recycling machine can effectively compress, reclaim, and recycle refrigerants without issues caused by contamination or insufficient lubrication.

Other components such as the power supply, refrigerant levels, and outer casing may require attention, but they do not have the same critical impact on the day-to-day performance and reliability of the recycling machine as oil and filter maintenance does. The oil and filter directly affect the internal workings and overall efficiency, making their routine check and replacement vital.