Kenworth W900A Leaf Springs, Hangers & Acc.

Frequently Asked Questions About Kenworth W900A Leaf Springs, Hangers & Acc.

What year models of Kenworth W900A are these leaf springs compatible with?

Our leaf springs and hangers are designed specifically for Kenworth W900A models manufactured from 1961 to 1985. The W900A features a unique suspension configuration that differs from later W900B and W900L models. Always verify your truck's VIN and model year before ordering, as suspension specifications can vary even within the same model year depending on factory options and axle configurations.

Are these leaf springs made from OEM-spec materials or aftermarket alternatives?

We carry both OEM-specification and heavy-duty aftermarket options. OEM-spec springs are manufactured using 5160 spring steel with proper heat treatment and shot peening for longevity. Our heavy-duty aftermarket options often feature additional leaves or upgraded steel alloys for increased load capacity. Each product listing specifies whether it meets OEM standards or offers enhanced specifications for severe-duty applications.

What tools and equipment do I need to replace leaf springs on my W900A?

Replacing leaf springs requires a floor jack rated for at least 20 tons, heavy-duty jack stands, a torque wrench capable of 450-500 ft-lbs, and spring compressors for multi-leaf packs. You'll also need a 3/4-inch drive socket set, penetrating oil for rusted U-bolts, and safety equipment including gloves and eye protection. Professional installation is recommended if you lack experience with heavy truck suspension work, as improper installation can lead to dangerous handling characteristics.

How do I determine if I need standard or heavy-duty leaf springs for my application?

Standard leaf springs are suitable for highway and general freight applications up to 80,000 lbs GVW. Heavy-duty springs are recommended for vocational trucks, off-road use, or consistent operation at maximum legal weight limits. Check your door jamb sticker for GAWR (Gross Axle Weight Rating) specifications. If you frequently haul near maximum capacity or operate on rough terrain, heavy-duty springs with additional leaves will provide better support and longevity.

Do your leaf spring hangers come with new bushings and mounting hardware?

Most of our replacement hangers include new rubber or polyurethane bushings pre-installed, but mounting bolts are typically sold separately due to varying frame configurations. We recommend replacing all bushings and hardware during spring replacement to ensure proper alignment and prevent premature wear. Complete hardware kits are available that include grade 8 bolts, lock washers, and U-bolts sized specifically for W900A applications.