Fits For John Deere Excavator: 27ZTS 35C 50ZTS 35ZTS 27C. Add the refrigerant oil as required. Check the compressor connections and pipe joints for refrigerant leaks. Aaha-parts specializes in electrical parts which fit various heavy equipment. Electrical parts are used to drive the mechanical components to work properly. They are the drive control part of the heavy equipment. Aaha-parts is a professional store deeply rooted in off-highway vehicle parts. Providing premium-quality, well-fitted components to keep your equipment running at its best.