The Caterpillar CAP AS-RAD (1843949) is a radiator cap that plays a crucial role in maintaining the proper functioning of your engine coolant system. Engine coolant leaks can occur from a faulty radiator cap, but with the dual action relief mechanism of this cap, you can rest assured that your radiator tank will be protected.

When the pressure in the radiator exceeds 88 kPa (12.7 psi), the secondary relief action activates to prevent any damage. In case of coolant leakage from the cap, it is important to check the tension of the fan belt or clean the radiator core to ensure proper flow. The coolant usually flows into the coolant overflow reservoir when the pressure exceeds the relief setting and returns to the radiator once the system pressure is restored to normal.

If you notice engine coolant leaks from the cap, it is recommended to check the spring for the gasket of the secondary relief action. The secondary relief action can be triggered by a downward press on the cap. Before reinstalling the cap, make sure to clean any debris from it. If the spring for the gasket of the secondary relief action has failed, it is advisable to replace the cap with a new 184-3949 Radiator Cap As.

This Caterpillar CAP AS-RAD (1843949) fits various models including 320C, 320C L, 320C U, 320C LU, 320C LRR, 320C FMST, 320C FMHW, 321C CR, 321C, 322C, 322C L, 325C, 325C L, and 325C CR. Please ensure compatibility with your specific model before making a purchase.

Product Specifications:

• Weight: 0.2 lbs
• Length: 7.5 cm
• Width: 4.3 cm
• Depth: 7.7 cm