Thermo King 781668 V-Belt 3V Engine to Electric Motor Assembly

The Thermo King 781668 is a triple banded 3V section V-belt designed to transmit power from the diesel engine to the electric motor generator assembly on T-Series transport refrigeration units. It replaces part numbers 78-1668 and 781-668. The belt features heat and stretch resistant chloroprene compound construction with industrial cogged profile for high torque capacity and thermal stability across extreme operating temperatures. It corresponds to industry standard size 3-3VX800 (33VX800) indicating three bands, 3V cross-section, and 80 inch effective length. This component is critical for maintaining electrical power generation for refrigeration system control and compressor clutch engagement.