Radiator cap for Terex PT30

The 0304-458 radiator cap serves as a critical closure for the radiator and oil cooler assembly on the Terex PT30 compact track loader. This component is engineered to maintain a specific internal pressure of 16 PSI within the engine cooling system. By sealing the system, it prevents the loss of coolant through evaporation and raises the boiling point of the fluid, allowing the engine to operate at higher temperatures without boiling over.

This cap is compatible with the Terex PT30 model. It features an integrated pressure relief valve designed to vent excess pressure should the system exceed the 16 PSI threshold, thereby protecting hoses and other cooling components from rupture.

A radiator cap functions as a pressure-regulating device in liquid-cooled engines. By holding the system at a set pressure, it ensures the coolant remains in a liquid state even when the engine reaches its normal operating temperature. The relief valve mechanism also allows for the expansion and contraction of coolant as the engine cycles through heating and cooling phases, managing the fluid flow between the radiator and the overflow reservoir.