Truck Leaf Springs Suitable For VOLVO TRUCK 257931

Leaf springs are an integral component of a vehicle’s suspension system that helps to absorb shock and provide a smooth ride. They consist of several thin “leaf” or flat steel strips stacked atop one another and bolted together.

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Product Introduction

Company Profile

Qingdao everlasting auto parts co., ltd. Was founded in 2018.Our main products are automobile suspension leaf springs, guide arms, coil springs and sway bars etc.We are a direct suspension leaf springs, guide arms, coil springs and sway bars manufacturer.Suspension leaf springs for trucks, trailers and pickups.Guide arms for air suspension system.Coil springs for cars.Suspension sway bars kits for racing cars, street performance cars, utvs and evs etc.

Why Choose Us

Our factory
Qingdao everlasting auto parts co., ltd. Was founded in 2018.Our main products are automobile suspension leaf springs, guide arms, coil springs and sway bars etc.We are a direct suspension leaf springs, guide arms, coil springs and sway bars manufacturer.

Our product
Suspension leaf springs for trucks, trailers and pickups.Guide arms for air suspension system.Coil springs for cars.Suspension sway bars kits for racing cars, street performance cars, utvs and evs etc.

Production market
In our domestic market, we manufacture leaf springs for oem truck manufacturers such as sintotruk and t-king etc.In the international market, we export to usa, russia, south koera, vietnam and uae etc.

Our service
Since its establishment, our company has been committed to meeting customers' requirement.We set up the principles of "high quality, fast delivery, quality warranty".We offer 12 months guarantee for our parts.

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What is Truck Leaf Springs?

Leaf springs are an integral component of a vehicle's suspension system that helps to absorb shock and provide a smooth ride. They consist of several thin "leaf" or flat steel strips stacked atop one another and bolted together. Once bent into an arch shape, these metal strips are attached to one end of the truck frame and one axle end.When a truck is loaded with cargo, its weight pushes down on its leaf springs. This compression causes the arch of the spring to flatten out and store potential energy. As soon as movement occurs, that stored energy is released and the spring returns to its original shape, pushing down on the axle again while taking in road shocks.

Advantages of Truck Leaf Springs

Strength and durability

Leaf springs are made up of several thick metal leaves that are versatile and incredibly durable. They are designed to cope with heavy loads and can withstand harsh conditions, making them ideal for use in tough vehicles like trucks, suvs, and off-road vehicles.

Simple and easy to maintain

Leaf springs are simple in design and easy to maintain, requiring little to no maintenance. The simplicity of the design also means that they are easy to diagnose and repair if needed.

Cost-effective

Compared to other suspension systems, leaf springs are generally inexpensive to manufacture and install, making them a cost-effective solution for many vehicle applications.

Increased ground clearance

Leaf springs offer increased ground clearance, making them suitable for off-road vehicles that need to navigate rocky and uneven terrain without getting stuck.

Stability

Leaf springs provide excellent stability by minimizing the swaying and body roll that can occur when a vehicle is in motion. They also offer good support and control, ensuring a comfortable and safe ride.

Types of Truck Leaf Springs

Multi-leaf springs
Multi-leaf springs are the most commonly used type of leaf springs in various vehicles. They consist of multiple leaves of varying lengths, thicknesses, and shapes, stacked together and held in place by a center bolt. The leaves are progressively longer from the center to the outer edges, with the longest leaf known as the main leaf or master leaf. The additional leaves, known as helper leaves or secondary leaves, provide additional support and flexibility to the suspension system.

Multi-leaf springs offer better load-carrying capacity and improved ride quality compared to single-leaf springs. The number of leaves and their thicknesses can be adjusted to meet the specific requirements of different vehicles. Heavy-duty trucks and commercial vehicles often utilize multi-leaf springs due to their ability to handle significant loads. These springs can effectively distribute weight and provide stability, making them suitable for applications that involve hauling or towing heavy loads.

Parabolic springs
Parabolic springs feature a tapered design that provides a progressive spring rate, ensuring a smooth and comfortable ride. Widely used in commercial truck applications, they enhance handling and ride quality, making them ideal for long hauls where driver comfort is paramount.

Tapered springs
Tapered springs offer versatility with their progressive compression design. Leaves taper in thickness from the center to the ends, providing adjustable suspension stiffness. They find applications in trucks requiring fine-tuned suspension setups to accommodate varying loads and road conditions.

Composite springs
Composite leaf springs, constructed using advanced materials like fiberglass, offer a blend of strength and lightweight characteristics. They are increasingly adopted in specialized truck applications where weight reduction is critical. Additionally, composite springs provide durable and efficient suspension solutions for trailers, offering high strength and corrosion resistance.

Parts of Truck Leaf Springs

Add-a-leaf's
An add-a-leaf is an extra leaf added to a leaf spring pack. Added leaves are installed to increase vehicle carrying capacity or to reduce sway by creating a firmer ride. They can also be used to increase the ride height of your vehicle.

Centre pins
Effectively, the center bolt holds the leaves together and puts them in contact with the axle. The center bolt head connects to the axle, which gives the truck its rear suspension in combination with the leaf springs.

Degree shims
Steel shims to go between your leaf springs and your spring perch. These are used on leaf spring vehicles in order to adjust pinion angles and achieve proper driveline geometry.

Fitted leaf's
Fitted leafs are designed as an option exclusively for skyjacker(r), soft ride(r), and lifted leaf springs. These are used when the additional weight of aftermarket accessories is installed such as a heavy winch bumper, swing tire carrier, or all your extra gear.

Shackles
A shackle is an integral component of the suspension system that attaches between the leaf spring and the vehicle frame. It allows for the leaf spring to work through length changes during suspension articulation.

Spring eyebolt kits
It's a grade 10.9 hardened steel bolt that typically fits many standard truck and van springs.

Spring perches/mounts
Leaf spring perches are welded on top or below your axle tube. Your leaf springs rest on top of the spring perch. Stock perches can collapse or get bent out of shape over time and need to be replaced.

How to Install Truck Leaf Springs?

Preparation – Before you set about installing your leaf spring, you will need to prepare your old suspension. It's recommended that you begin this preparation at least 3 days before the old springs are due to be removed. Old leaves may be rusted on so you will need to make sure they are removed without damaging any of the other parts. To prepare the old suspension, soak all existing parts in oil to loosen them up (brackets, nuts and bolt). This will make it easier for you to remove them.

Raise vehicle – Once you have finished preparation, you will need to raise the rear end of the vehicle and remove the rear tyres. You can use a floor jack to do this until the tyres are at least 3 inches off the floor.Place a jack stand on either side of the vehicle approximately one foot in front of each rear tyre. Then lower the floor jack and use it to support the rear axle by placing it under the rear axle gear housing.

Remove springs – The next step involves removing the old leaf springs. Loosen the prepared nuts and bolts on the bracket u-bolts first, before removing the u-bolts themselves. After you have done this you can remove the leaf springs by removing the eyelet bolts from the bushes. The old leaf spring can now be lowered safely.

Attach u-bolts – Tighten all mounting bolts and place the u-bolt brackets around the leaf spring rear axle. Be sure to check that these are secured firmly in place and that all bolts have been tightened properly. It's recommended to check the tightness of these about a week after installation (assuming the vehicle has been driven), to make sure they haven't loosened in any way.

Lower vehicle – Remove the floor jacks and lower the vehicle to the ground slowly. Your job is now complete!

How to Choose Truck Leaf Springs

Determine your truck's weight capacity

Leaf springs come in different weight capacities, and it is essential to select the appropriate one for your truck. The capacity will depend on the weight of your truck, including cargo and passengers, and should be rated to handle the load.

Select the right length

Leaf springs come in different lengths, and your truck's size and type will determine the right length for your vehicle. It is best to choose springs that match the original length of your vehicle's springs.

Consider the type of driving you do

The type of driving you do on a regular basis will also impact the type of leaf spring you choose. If you regularly carry heavy loads or tow trailers, you should consider heavy-duty springs. If you use your truck for light-duty tasks, standard-duty springs will suffice.

Look for quality

Leaf springs are a crucial component of your truck's suspension system, and it is essential to invest in high-quality springs to ensure durability and reliability. Choose a reputable manufacturer and opt for springs made of high-quality materials to ensure longevity.

Consult with a professional

If you are unsure about which leaf spring to select for your truck, it is best to consult with a professional mechanic or suspension specialist who can recommend the appropriate spring for your vehicle.

Precautions for Maintenance of the Truck Leaf Springs

Driver in the course of the use of vehicles, may be damaged leaf spring break the emergence of course, because the use of leaf springs for a long time, there is the phenomenon of fracture this is normal, but if it is early damage from the root should be due to abnormal use and maintenance caused. In the following for a driver summed up a few leaf spring in the use of precautions.

1. Truck drivers in the usual should pay more attention to leaf spring maintenance, lubrication should be carried out regularly to prevent the lack of lubrication caused by shock absorber failure.

2. In the usual maintenance process should also pay attention to horse bolts, center bolts fastened to prevent the damage caused by the steel plate spring bolt loosening.

3. The number of leaf spring is closely related to the rated load of the vehicle. When the vehicle is often under overload or partial load, the fatigue strength of the leaf spring will be reduced and the service life of leaf spring will be reduced.

4. In order to extend the life of the leaf spring, should avoid running too fast, especially in the rugged road driving, the speed will lead to excessive acceleration of steel leaf spring fatigue and damage.

6.When driving to minimize the emergency brake, otherwise it will let the leaf spring to withstand greater bending stress and tensile stress; in addition, when turning, the speed is too fast, will increase the outer truck leaf spring load, speed up damage to leaf spring.

Tips for Leaf Spring Maintenance on Your Trailer

Regular inspection

Perform visual inspections of the leaf springs regularly. Look for signs of wear, damage, or corrosion. Pay attention to any cracks, rust, or deformation in the springs, shackles, and mounting hardware.

Cleanliness

Keep the leaf springs clean and free of debris, mud, and road salt. Dirt and debris can accelerate corrosion and contribute to premature wear. Regularly wash the underside of the trailer, including the leaf springs, with soap and water.

Lubrication

Lubricate the leaf springs and associated components to reduce friction and prevent corrosion. Apply a high-quality grease or lubricant to the spring surfaces, shackles, and bushings. Lubrication helps maintain flexibility and prevents squeaking.

Tighten loose fasteners

Check for loose nuts, bolts, and u-bolts securing the leaf springs to the axle and trailer frame. Tighten any loose fasteners to the manufacturer's specifications. Loose hardware can cause the leaf springs to shift or become misaligned, leading to uneven wear and reduced performance.

Replace damaged parts

If you notice any signs of damage, such as cracks, bends, or severe corrosion, replace the affected leaf springs or components immediately. Damaged leaf springs compromise the trailer's stability and safety.

Adjust alignment

Ensure that the leaf springs are properly aligned and positioned symmetrically on both sides of the trailer. Misaligned leaf springs can cause uneven weight distribution and handling issues.

Check load capacity

Verify that the leaf springs are suitable for the trailer's weight and load capacity. Overloading the trailer can cause excessive stress on the leaf springs, leading to premature failure. Follow the manufacturer's recommendations for load limits.

Inspect suspension components

In addition to the leaf springs, inspect other suspension components such as shock absorbers, bushings, and hangers. Replace any worn or damaged parts to maintain the integrity of the suspension system.

FAQ

Q: What do leaf springs do on a truck?

A: Leaf springs center the rear axle under the chassis both side-to-side and front-to-back; they also support the weight of your vehicle and its cargo. Additionally, these spring packs provide movement to the rear suspension, compressing and expanding to allow the rear axle to articulate for a smooth and capable ride.

Q: Do trucks still use leaf springs?

A: A number of heavy-duty trucks and commercial vehicles continue to use leaf springs, thanks to their affordability, reliability, and ruggedness. They're available as a weight-saving option on the mercedes sprinter van, for instance.

Q: How do I know if my truck leaf springs are bad?

A: A telltale sign of worn-out leaf springs is a sagging rear end. This uneven stance, where the rear of the vehicle appears lower than the front, indicates a loss of tension and strength in the springs.

Q: How long do truck leaf springs last?

A: In an older, heavily driven automobile, the leaf springs may not last as long. In contrast, a well-maintained vehicle's leaf springs can last well over 100,000 miles. On average, a set of leaf springs might last about 200,000 miles.

Q: Why do truck leaf springs break?

A: Road salt is used to melt ice and snow on roads, but it can also cause corrosion on vehicle components, including springs. Over time, the corrosion can weaken the springs and cause them to break. Another common cause of spring breakage is damage from impact.

Q: What is better than leaf springs?

A: Coil springs allow the suspension system to flex much more than a leaf spring system does. This means that many high-performance trucks go for the coil spring suspension system rather than leaf spring. A coil system allows more movement in the suspension system, making them a better choice for difficult terrain.

Q: When did they stop using leaf springs?

A: Leaf springs were very common on automobiles until the 1970s when automobile manufacturers shifted primarily to front-wheel drive, and more sophisticated suspension designs were developed using coil springs instead.

Q: Can I lift a truck with leaf springs?

A: When you want to raise your truck or improve your vehicle's suspension, you're likely going to see lift blocks and leaf springs in your search. These parts can be used together to raise the height of your truck and improve its carrying capacity.

Q: Do leaf springs sag over time?

A: All springs sag with age. The constant load they bear leads to creep within the molecular structure of the metal. Over time, the spring weakens and begins to lose height (coil spring) or arch (leaf spring).

Q: Are leaf springs hard to change?

A: Leaf springs are heavy and can be difficult to remove and install, resulting in unexpected parts being damaged or broken, including parts that are attached to the technician. Safe handling procedures such as using heavy lifting equipment, wearing gloves and eye protection are always recommended.

Q: Why do pickup trucks still use leaf springs?

A: What is the main reason for using them? Using a leaf spring in a truck is a much more cost effective and economical alternative to spring absorbers. Due to the size of the load they typically carry lcvs and hgvs usually need the springs replacing more often.

Q: How much does it cost to replace leaf springs on a truck?

A: The average cost to replace leaf springs ranges from $450 to $790 if you hire a professional. These estimates include the cost of labor in addition to the springs and parts. The cost of the installation alone could range from $95 to $170 depending on where you go.

Q: Do leaf springs need maintenance?

A: Leaf spring maintenance on your trailer is essential for ensuring longevity and optimal performance. Leaf springs play a crucial role in supporting the weight of the trailer and providing stability while towing.

Q: Are leaf springs obsolete?

A: Coil springs are an obvious choice for many situations, but leaf springs still have an edge. Leaf springs are treated like archaic tech, as they aren't found under any of the latest industry-leading performance cars, and are often used as a point of reference that shows how "dated" a particular design is.

Q: Are leaf springs ok for off road?

A: If you drive with them on rugged dirt roads, you will bounce around quite a bit and increase the risk of damaging the leaf springs or worse still, snapping your axles. As such, you're very limited as to where you can take a caravan with leaf springs.

Q: Does ford use leaf springs?

A: Your leaf springs are not especially prone to failure, but excessive rust can make them more prone to failure. Contact your local ford service department to have the suspension system in your ford evaluated and have the leaf springs replaced if necessary.

Q: Can I add 2 leaf springs to my truck?

A: When a vehicle is slumping at the back while loaded, it's an obvious sign the vehicle is not living up to its carrying its load. With the addition of an extra leaf into each rear leaf spring, inches of lift can be added to the back that will keep the vehicle horizontal, even when the back is full.

Q: Why do some trucks have leaf springs?

A: Leaf springs allow trucks and vans to carry large loads while protecting the vehicles from damage caused by uneven roads. Without this suspension system, some heavy haulage would not be as efficient.

Q: Can I lower my truck with leaf springs?

A: Blocks have been one of most popular ways to lower the rear of pickup trucks anywhere from one to three inches. Many lowering kits include leaf spring blocks inserted between the axle and the leaf spring. The absolute best blocks to use are steel units with a built-in pinion angle correction.

Q: Do truck leaf springs wear out?

A: Your factory-installed metal leaf springs are made to last for a general period of time before eventually wearing down and requiring replacement. If you're in tune with the way your vehicle handles and performs, you're sure to notice signs of worn-out leaf springs.

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