Description
When your cab A/C starts acting up—maybe it’s freezing one minute and barely cooling the next, or the evaporator’s icing up and blocking all the airflow—there’s a good chance your expansion valve has gone bad. This little component is the throttle for your entire A/C system, controlling exactly how much refrigerant flows to the evaporator. When it’s working right, you get consistent cooling all day long. When it’s not, well, that’s when those long summer days in the field become downright miserable.
What You’re Getting
- Bulb-type thermostatic expansion valve that responds to evaporator temperature for precise control
- Externally equalized design provides accurate pressure sensing for optimal performance
- 19-inch capillary tube allows flexible installation while maintaining proper sensing
- Flare connections ensure leak-free installation with standard A/C fittings
- Compatible with both R12 and R134a refrigerants for older and newer systems
Built for Real Farm Work
This expansion valve fits a wide range of International Harvester equipment that’s still earning its keep on farms today. It works on workhorse tractors from the 786 through the big 1586, including the Hydro 186 that’s still popular for its smooth operation. You’ll also find it on combines like the 1440 through 1480 series that handle serious grain harvesting, plus windrowers from the 6000 series up through the 8840 that keep hay operations running smoothly.
Made to Last
TISCO builds this valve to handle the vibration, temperature swings, and demanding conditions that farm equipment faces every day. The thermostatic bulb responds accurately to evaporator temperature changes, while the external equalization ensures the valve gets proper pressure feedback for consistent operation. It’s designed to work reliably whether you’re running old-school R12 or have converted to the newer R134a refrigerant.
Installation Notes
This is a direct replacement that uses standard flare fittings, so installation should be straightforward for anyone familiar with A/C work. Make sure the thermostatic bulb is properly secured to the evaporator outlet and well-insulated. The 19-inch capillary tube gives you plenty of length to route it properly without kinking. Always evacuate and recharge the system after installation, and double-check that you’re using the right refrigerant type for your particular machine.
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