Aftermarket Parts Specialist certified

Aftermarket Parts Specialist

OEM-Equivalent Quality Assurance certified

OEM-Equivalent Quality Assurance

Heavy Duty Radiator Caps

Heavy duty radiator caps for construction equipment, commercial trucks, and industrial machinery from top brands like Caterpillar, Komatsu, John Deere, and Freightliner. Engineered to maintain precise cooling system pressure, prevent coolant loss, and ensure reliable engine performance in demanding environments.

Heavy Duty Radiator Caps

Our Range of Products

Frequently Asked Questions

What is the best radiator cap to use?

The best radiator cap depends on your equipment's specified pressure rating and cooling system design. For heavy duty machinery like Caterpillar, Komatsu, or John Deere equipment, always use a cap rated to the OEM pressure specification. Using an incorrect pressure rating can cause coolant loss, overheating, or system damage. Radiator Supply House stocks OEM-equivalent caps matched to specific makes and models.

What heavy equipment brands do your radiator caps fit?

Can I use these radiator caps on GenSet and industrial power equipment?

Are your radiator caps OEM-equivalent quality?

How do I find the correct radiator cap for my equipment model?

Do you supply cooling accessories beyond radiator caps?

Do you ship radiator caps internationally or only within the USA?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Construction & Mining

Construction & Mining

Radiator caps for Caterpillar, Komatsu, and John Deere excavators, dozers, and loaders used on demanding job sites.

Commercial Trucking & Freight

Commercial Trucking & Freight

Cooling system caps for Peterbilt, Freightliner, and KW long-haul and vocational trucks in fleet operations.

Power Generation & Industrial

Power Generation & Industrial

Radiator caps for GenSet and MTU-powered industrial generators used in continuous-duty power generation facilities.

Oil & Gas Equipment

Oil & Gas Equipment

Cooling components for MTU fracking and high-temperature industrial equipment used in oil and gas operations.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

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Why Construction & Fleet Operators Choose Radiator Supply House

300+ Manufacturer Coverage

We stock cooling components for over 300 equipment brands including Caterpillar, Komatsu, John Deere, Freightliner, and Peterbilt — all in one place.

Hard-to-Find Parts, In Stock

Access radiator caps and cooling accessories for specialized configurations including GenSet, desert-upgrade, and fracking equipment that most suppliers don't carry.

Complete Cooling System Solutions

From radiator caps and drain plugs to full cooling packages, Radiator Supply House is your single source for every cooling system need.

Need the Right Radiator Cap? Let Us Help.

Submit your equipment details and our cooling system specialists will confirm compatibility and availability fast.

Contact Us Today

For immediate assistance, feel free to give us a direct call at +1 877-615-3002.