Mack RD Truck Fuel Tanks

Frequently Asked Questions About Mack RD Truck Fuel Tanks

What sizes and configurations are available for Mack RD fuel tanks?

Mack RD fuel tanks are typically available in a range of capacities, commonly from 50 to over 150 gallons, in both round and D-shaped (D-cell) styles. The right size and shape for your truck depends on your frame rail spacing, mounting bracket setup, and how much fuel capacity your application requires, so it's important to measure your existing tank or check your truck's specs before ordering.

What materials are these fuel tanks made from, and how do they hold up?

Fuel tanks for the Mack RD are generally offered in aluminum or steel construction. Aluminum tanks are lighter and naturally corrosion-resistant, making them a popular choice for reducing overall vehicle weight, while steel tanks tend to be more rugged and are often chosen for heavy-duty or vocational applications. Both materials can perform well long-term when properly maintained, but aluminum typically resists rust better in wet or salted-road environments.

Will a replacement fuel tank fit my Mack RD without modification?

Fit depends on matching the tank's diameter, length, strap/bracket spacing, and neck or sender location to your truck's original setup. Because the Mack RD was produced over many model years with different configurations, we recommend confirming measurements and mounting hardware compatibility against your existing tank before purchasing to avoid needing to modify brackets or straps.

Do these fuel tanks come with the necessary mounting hardware and accessories?

Some listings include mounting straps, brackets, or sending unit provisions, while others are sold as the bare tank only. Be sure to check the specific product description for what is included, and plan to reuse or separately source straps, hardware, fuel gauges, or sending units if they are not part of the package.

How do I properly maintain or troubleshoot issues with my fuel tank?

Routine maintenance includes periodically inspecting straps and mounting brackets for wear, checking for corrosion or fuel leaks around seams and fittings, and keeping the fuel cap and vent clear of debris. If you notice fuel odor, visible leaks, or rust-through, it's best to inspect the tank promptly and replace it if the integrity of the tank is compromised, since a damaged fuel tank can pose a safety risk.