Komatsu Radiator Caps

The numbers refer to the pressure rating — 0.9 bar is approximately 13 psi, while 1.1 bar is approximately 16 psi. A 1.1 bar cap maintains higher system pressure, which raises the coolant's boiling point slightly and improves cooling efficiency. Using the wrong pressure rating can cause coolant loss, overheating, or radiator damage. Always match the cap rating to your specific Komatsu equipment's specification as listed in your operator's manual.

To find the correct Komatsu radiator cap, you need your equipment's model number and the radiator filler neck diameter. Check your Komatsu operator's manual or the existing cap for the pressure rating (e.g., 0.9 or 1.1 bar). Radiator Supply House specialists can also cross-reference your equipment model to identify the exact compatible cap.

Yes. A worn or incorrect radiator cap can fail to hold the required system pressure, causing coolant to boil at lower temperatures and escape through the overflow. This leads to reduced coolant levels and overheating. Replacing a damaged Komatsu radiator cap promptly is a low-cost way to prevent serious engine damage.

Yes. Radiator Supply House supplies ICEBOX Replacement parts that meet OEM-equivalent quality standards. These caps are engineered to match original Komatsu specifications for pressure rating, fitment, and materials, ensuring reliable performance and a proper seal in your equipment's cooling system.

The inventory covers a broad range of Komatsu machinery including wheel loaders such as the WA500-6, excavators, bulldozers, and other construction and mining equipment. Contact the Radiator Supply House team with your specific Komatsu model number and they will confirm compatibility and availability for the correct radiator cap.

Radiator Supply House supplies Komatsu radiator caps for multiple industries, including construction and mining (excavators, wheel loaders, bulldozers), power generation and industrial machinery, oil and gas field equipment, and fleet maintenance and repair shops servicing Komatsu heavy equipment cooling systems.

You can search for a radiator cap on the Radiator Supply House website and select the correct size and PSI for your equipment. You can also contact the team directly by phone at 1-877-615-3002, by email at info@RadiatorSupplyHouse.com, or by clicking the Talk to an Expert button below, available Monday through Friday, 7AM–5PM.