New Holland 1990756C2 Expansion Valve Assembly

The 1990756C2 is a block-type thermal expansion valve (TXV) rated at 2 tons of refrigeration capacity, designed for R134a refrigerant systems. It features a #6 (3/8 inch) hose inlet fitting and a #10 (5/8 inch) evaporator outlet fitting with a factory superheat setting of 8 degrees Fahrenheit. The valve utilizes a flare (FL) port configuration and incorporates an O-ring seal design for reliable sealing under vibration. This component regulates refrigerant flow into the evaporator by sensing suction line temperature and pressure, maintaining optimal superheat for efficient cooling performance in cab air conditioning systems. The valve serves as a direct replacement for OEM part numbers 1990756C2, 87033212, AH122867, 7787-540021, 98370C3, 317725A1, 35-1627T91, 135777C2, 1990756C1, 386535A1, 840086N, 3501-10006, 6914411, 84015397, and 4379RD570150 across New Holland, Case IH, Ford/New Holland, John Deere, Freightliner, Mack, Volvo, JCB, Massey Ferguson, and Caterpillar equipment. It is compatible with the replacement evaporator core 1974632C4 which utilizes dual-size fittings. Installation requires proper O-ring lubrication and torque specification adherence to prevent seal damage and refrigerant leaks.