Different maintenance tasks should be conducted daily, weekly, and monthly, as well as by months/operating hours, whichever occurs first. Before each operation, you should look for oil leaks, check the lubricant levels, drain the receiver tank condensate, check for unusual noises or vibrations, ensure belt guards and covers are in place, check the engine for fuel and lubricant, clear the area around the compressor, and check the system oil pressure on pressure-lubricated models while the compressor is hot.