Caterpillar 4W1584 Temperature Regulator Thermostat

Caterpillar 4W1584 Temperature Regulator Thermostat is Cat’s coolant-temperature regulator, a precision thermostat assembly that governs when coolant is allowed to flow through the engine cooling system to maintain the proper operating temperature across variable loads and ambient conditions. This part carries the 4W1584 (4W-1584) designation and is designed for durability in Caterpillar engines and cooling configurations, delivering reliable temperature control within CAT equipment that operates in demanding environments. By sensing coolant temperature and actuating the regulating valve, it helps prevent overheating during heavy use and minimizes overcooling during cold starts, contributing to consistent engine performance and protection of critical components. Typical applications include construction and mining machinery, as well as Caterpillar-powered power generation sets, where a robust thermostat is essential for maintaining stable operating conditions and efficient fuel use. In CAT parts catalogs and dealer networks, 4W1584 is the identified coolant-temperature regulator you would request for compatible Cat cooling-system configurations.