International PayStar 5000 Leaf Springs-Hanger-Acc

Frequently Asked Questions About International PayStar 5000 Leaf Springs, Hangers & Accessories

What years and models of International PayStar 5000 are these leaf springs compatible with?

Our leaf springs are designed to fit International PayStar 5000 models from 2003-2017. However, compatibility can vary based on your truck's specific configuration, including GVWR rating and axle capacity. We recommend checking your VIN or contacting our technical support team with your truck's build sheet to ensure proper fitment. Keep in mind that trucks with custom suspensions or aftermarket modifications may require different specifications.

What's the weight capacity and how do I choose the right spring pack for my application?

Leaf spring capacity ranges from 12,000 to 23,000 pounds per axle, depending on the spring pack configuration. To select the right springs, you'll need to know your truck's front axle weight rating (FAWR) or rear axle weight rating (RAWR), which can be found on your door jamb sticker. For heavy-duty vocational applications like dump trucks or mixers, we typically recommend upgrading to progressive-rate spring packs that provide better load handling. Standard flat-rate springs work well for highway and general freight applications.

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

While experienced mechanics can install leaf springs with proper equipment, this job requires heavy-duty tools including a floor jack rated for commercial trucks, jack stands rated for at least 25,000 pounds, spring compressors, and torque wrenches capable of 450-500 ft-lbs. The process typically takes 4-6 hours per axle. Many customers find it more cost-effective to have a commercial truck shop handle installation, as improper installation can lead to premature wear or safety issues. Always replace U-bolts and bushings during installation.

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

OEM-style springs match factory specifications and ride characteristics, making them ideal for trucks maintaining original weight ratings. Heavy-duty aftermarket springs typically feature additional leaves, shot-peened construction for fatigue resistance, and military-wrapped eyes for increased durability. Aftermarket options often provide 15-20% more capacity but may result in a stiffer ride when unloaded. For severe-service applications, aftermarket springs generally offer better value with 2-3 times the service life of standard OEM replacements.

How can I tell if my leaf springs need replacement, and what about the hangers and shackles?

Signs of worn leaf springs include visible cracks, separated leaves, sagging ride height (more than 2 inches from spec), and excessive bouncing or swaying. Check for broken center bolts and worn spring eyes. Hangers and shackles should be inspected for cracks, elongated mounting holes, and excessive play - more than 1/8 inch movement indicates replacement is needed. When replacing springs, we strongly recommend replacing hangers, shackles, and bushings as a complete system to ensure proper alignment and prevent premature wear.