Frequently Asked Questions About Kenworth W900A Steer Axle Springs & Hangers

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

Our steer axle springs and hangers are designed to fit Kenworth W900A models from 1961 through 1987. However, there were minor variations in mounting configurations during this production run. Models from 1961-1975 typically use a 44-inch spring length, while 1976-1987 models often require a 48-inch spring. Always verify your existing spring measurements and mounting bracket spacing before ordering to ensure proper fitment.

What weight capacity should I choose for my steer axle springs?

The correct spring capacity depends on your specific application and front axle weight rating. Most W900A models came with either 12,000 lb or 14,600 lb front axles. For standard highway applications, we recommend matching your original spring capacity. Heavy-haul operators often upgrade to springs rated 2,000-3,000 lbs higher than stock for improved stability. Check the stamped numbers on your existing springs or consult your door jamb sticker for the original front GAWR specification.

Can I install these springs and hangers myself, or do I need special tools?

While experienced mechanics can perform this installation, it requires heavy-duty equipment and safety precautions. You'll need a minimum 20-ton hydraulic jack, heavy-duty jack stands rated for commercial trucks, a 3/4-inch drive socket set, and spring compressors. The job typically takes 4-6 hours per side. Critical torque specifications include 450-500 ft-lbs for spring pin bolts and 175-200 ft-lbs for hanger bolts. Due to safety concerns when working with compressed springs, many operators prefer professional installation.

What's the difference between OEM-style and heavy-duty aftermarket hangers?

OEM-style hangers match the original 3/8-inch steel plate construction and work well for standard applications. Heavy-duty aftermarket hangers feature 1/2-inch to 5/8-inch reinforced steel construction, greaseable pins, and improved bushing materials like polyurethane or bronze. These upgraded hangers typically last 2-3 times longer than OEM units and better resist stress cracking at the spring eye contact points, especially important for vocational trucks or those running heavy front ends.

How do I know when my springs and hangers need replacement?

Key indicators include visible cracks in spring leaves, especially near the center bolt area, sagging that causes your truck to lean or sit lower on one side, excessive play or clunking sounds when turning, worn or oval-shaped spring eye bushings, and rust penetration beyond surface level. Measure your front ride height from the frame rail to ground on level surface - a difference of more than 1 inch side-to-side indicates spring fatigue. Hangers showing cracks at weld points or elongated bolt holes require immediate replacement for safety.