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Freightliner SD 108-122 Air Tanks, Wraps-Mounting
Frequently Asked Questions About Freightliner SD 108-122 Air Tanks, Wraps & Mounting
What specific Freightliner models and years are compatible with these SD 108-122 air tanks?
These air tanks are designed specifically for Freightliner SD models including the 108SD, 114SD, and 122SD trucks manufactured from 2012 to present. They are engineered to fit the factory mounting points on these severe duty models. Always verify your truck's VIN and model year before ordering, as slight variations may exist between early and late production years.
Are these air tanks made from steel or aluminum, and how does this affect longevity?
Most SD 108-122 air tanks are constructed from heavy-duty steel with anti-corrosion coating, though some aluminum options are available. Steel tanks typically offer 10-15 years of service life with proper maintenance, while aluminum tanks can last 15-20 years but cost approximately 30-40% more. Steel tanks are more impact-resistant for severe duty applications, while aluminum reduces weight by about 40 pounds per tank.
What mounting hardware is included, and what additional parts might I need for installation?
Standard air tank packages include the tank, mounting brackets, and grade 8 bolts. However, you will need to purchase separately: air line fittings (typically 1/2" NPT), drain valves, pressure protection valves, and new air lines if replacing old tanks. Tank wraps and straps are also sold separately. Budget an additional $75-150 for these components per tank.
Can I install these air tanks myself, or do I need professional installation?
While experienced mechanics can complete the installation in 2-3 hours per tank, we recommend professional installation for safety reasons. The process requires proper torque specifications (typically 85-95 ft-lbs for mounting bolts), air system knowledge for proper plumbing, and DOT compliance verification. Improper installation can lead to air leaks, tank failure, or brake system issues.
What size air tanks should I choose for my application - 20, 23, or 25 gallon?
Tank size depends on your truck's configuration and usage. Standard dump trucks typically use 20-gallon tanks, while heavy haul or vocational trucks with multiple trailers benefit from 23 or 25-gallon tanks. The larger tanks provide more air reserve for frequent brake applications. Check your current tank size stamped on the tank head - most SD models come factory-equipped with 20-gallon tanks, but upgrading is possible if you have adequate frame space.