Frequently Asked Questions About Mack RD Truck Fuel Tank Brackets & Straps

What years and models of Mack RD trucks do these fuel tank brackets and straps fit?

Our fuel tank brackets and straps are designed to fit Mack RD series trucks from 1988 through 2007, including RD688, RD690, RD600, and RD800 models. However, fitment can vary based on your specific tank configuration and size. We recommend checking your existing bracket part numbers or contacting us with your VIN to ensure proper fitment, as some mid-year production changes may affect compatibility.

Are these brackets made from stainless steel or regular steel, and will they rust?

We carry both stainless steel and powder-coated steel options. Stainless steel brackets offer superior corrosion resistance and typically last 10-15 years even in harsh road salt conditions. Our powder-coated steel brackets feature a durable black finish that resists rust for 5-7 years under normal conditions. For trucks operating in northern climates or coastal areas, we strongly recommend stainless steel for maximum longevity.

Do I need special tools to install these brackets, and how long does installation typically take?

Installation requires basic hand tools including socket wrenches (typically 3/4" and 7/8"), a torque wrench, and potentially a floor jack to support the tank during bracket replacement. Most experienced mechanics can complete the job in 2-3 hours per side. The most challenging aspect is safely supporting the fuel tank weight while removing old brackets. We recommend having a helper or using a transmission jack for safety.

Can I use universal straps instead of Mack-specific ones, and what length do I need?

While universal straps may physically fit, Mack-specific straps are engineered with the correct length, width, and mounting hole spacing for proper tank support. Standard Mack RD tanks typically require 26-inch straps for 50-gallon tanks and 30-inch straps for 100-gallon tanks. Using incorrect strap lengths can cause tank shifting, premature wear, and potential DOT violations during inspections.

How do I know when my fuel tank brackets and straps need replacement?

Inspect your brackets and straps during every oil change. Replace immediately if you notice: visible cracks or stress fractures in brackets, stretched or frayed straps, excessive rust or corrosion penetrating beyond surface level, loose mounting bolts that won't stay tight, or any tank movement when full. DOT regulations require secure tank mounting, and worn brackets can result in failed inspections and costly roadside violations.