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Freightliner FLD SBA Steer Axle Springs & Hangers
Frequently Asked Questions About Freightliner FLD SBA Steer Axle Springs & Hangers
What years and models of Freightliner FLD trucks are compatible with these SBA steer axle springs and hangers?
These SBA (Set Back Axle) springs and hangers are designed specifically for Freightliner FLD 112 and FLD 120 models manufactured from 1989 through 2001. The SBA configuration is distinguished by having the front axle positioned further back from the bumper compared to standard FLD models. Before ordering, verify your truck has the set back axle configuration by checking if your front axle sits approximately 18-24 inches behind the bumper.
What weight capacity should I choose for my steer axle springs?
Most Freightliner FLD SBA applications require springs rated between 12,000 to 14,600 pounds per axle. The correct capacity depends on your specific application - standard highway trucks typically use 12,000-13,200 lb springs, while heavy-haul or vocational trucks often require 14,000-14,600 lb ratings. Check the door jamb sticker or original equipment specifications to confirm your front GAWR (Gross Axle Weight Rating) before selecting springs.
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 including a minimum 20-ton hydraulic jack, heavy-duty jack stands rated for commercial trucks, and proper spring compressors. The job typically takes 4-6 hours per side. Critical safety note: the front springs are under extreme tension and improper removal can cause serious injury. We recommend professional installation unless you have commercial truck suspension experience and proper equipment.
What's the difference between OEM and aftermarket springs for my FLD?
OEM springs are manufactured to original Freightliner specifications using specific steel alloys and heat treatment processes. Quality aftermarket options from manufacturers like Dayton Parts and Triangle Suspension use similar materials and often meet or exceed OEM specifications at a lower price point. The main differences are typically the warranty period (OEM usually offers longer coverage) and the finish - OEM springs often have a black e-coat finish while aftermarket may use paint or powder coating.
How do I know when my steer axle springs and hangers need replacement?
Key indicators include: visible cracks in the spring leaves (especially near the eyes), uneven tire wear on the steer tires, truck pulling to one side, a sagging front end (measure ride height from frame to ground - should be equal on both sides), excessive bounce or harsh ride quality, and rust-through or elongated bolt holes in the hangers. Additionally, if you notice shiny wear marks between spring leaves or broken center bolts, replacement is necessary for safety. Most springs last 500,000-700,000 miles under normal highway use.